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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2189. Отображено 100.
15-03-2012 дата публикации

Method for separating off nitrogen and hydrogen from natural gas

Номер: US20120060554A1
Автор: Hans Schmidt
Принадлежит: Linde GmbH

The invention relates to a method for separating off nitrogen and lighter components, in particular hydrogen, carbon monoxide, neon and argon, from a feed fraction (e.g., natural gas) that is to be liquefied containing at least methane, nitrogen and hydrogen. The cooling and liquefaction of the feed fraction proceeds against the refrigerant or mixed refrigerant of at least one refrigeration cycle. In the inventive method, the feed fraction ( 1 ) is partially condensed (E 1 ), and separated in at least one rectification column (T) into a methane-rich fraction ( 6 ) and a fraction ( 4 ) containing nitrogen and lighter components. The methane-rich fraction ( 6 ) is subcooled. Additionally, cooling of the top condenser (E 2 ) of the rectification column (T) proceeds via a refrigerant or mixed refrigerant or a substream of the refrigerant or mixed refrigerant of at least one, refrigeration cycle ( 20 - 24 ).

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Номер записи: 1
05-04-2012 дата публикации

Removal of hydrogen

Номер: US20120079849A1
Автор: Hans Schmidt
Принадлежит: Linde GmbH

The invention relates to a method for liquefying a hydrocarbon-rich fraction ( 1, 1′ ) which contains substantially methane, hydrogen and nitrogen. In the inventive method, before the liquefaction (V) of the hydrocarbon-rich fraction ( 1, 1′ ), the hydrogen ( 2 ) is removed (M) by permeation. This removal (M) of the hydrogen ( 2 ) by permeation is effected in a single-stage or multistage removal process.

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Номер записи: 2
26-04-2012 дата публикации

Process for separating and recovering NGLs from hydrocarbon streams

Номер: US20120096895A1
Автор: Kirtikumar Natubhai Patel, Rohit N. Patel
Принадлежит: Individual

This process comprises using unconventional processing of hydrocarbons, e.g. natural gas, for recovering C2+ and NGL hydrocarbons that meet pipeline specifications, without the core high capital cost requirement of a demethanizer column, which is central to and required by almost 100% of the world's current NGL recovery technologies. It can operate in Ethane Extraction or Ethane Rejection modes. The process uses only heat exchangers, compression and simple separation vessels to achieve specification ready NGL. The process utilizes cooling the natural gas, expansion cooling, separating the gas and liquid streams, recycling the cooled streams to exchange heat and recycling selective composition bearing streams to achieve selective extraction of hydrocarbons, in this instance being NGLs. The compactness and utility of this process makes it feasible in offshore applications as well as to implementation to retrofit/revamp or unload existing NGL facilities. Many disparate processes and derivatives are anticipated for its use.

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Номер записи: 3
17-05-2012 дата публикации

Process For The Production Of Hydrogen And Carbon Dioxide

Номер: US20120118011A1
Автор: Arthur Darde, Bhadra S. Grover, Dennis A. Vauk, Paul TERRIEN, Purushottam V. Shanbhag, Trapti Chaubey
Принадлежит: Air Liquide Large Industries US LP, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

The present invention provides a method to more efficiently recover hydrogen and carbon dioxide as well as a design for carbon dioxide capture from syngas that allows for the simultaneous production of medium to high amounts of hydrogen and the capture of at least 90% of the carbon dioxide in the syngas as a part of the production of hydrogen in a hydrogen generation plant. Through the use of a combination of hydrogen selective membranes and carbon dioxide selective membranes together with a carbon dioxide separation unit it is possible to increase recovery of hydrogen and carbon dioxide and improved process efficiency of the hydrogen generation plant.

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Номер записи: 4
16-08-2012 дата публикации

Cryogenic system for removing acid gases from a hydrocarbon gas stream, with removal of hydrogen sulfide

Номер: US20120204599A1
Автор: Bruce T. Kelley, Charles J. Mart, Paul Scott Northrop
Принадлежит: Individual

A system for removing acid gases from a raw gas stream includes an acid gas removal system (AGRS) and a sulfurous components removal system (SCRS). The acid gas removal system receives a sour gas stream and separates it into an overhead gas stream comprised primarily of methane, and a bottom acid gas stream comprised primarily of carbon dioxide. The sulfurous components removal system is placed either upstream or downstream of the acid gas removal system. The SCRS receives a gas stream and generally separates the gas stream into a first fluid stream comprising hydrogen sulfide, and a second fluid stream comprising carbon dioxide. Where the SCRS is upstream of the AGRS, the second fluid stream also includes primarily methane. Where the SCRS is downstream of the AGRS, the second fluid stream is principally carbon dioxide. Various types of sulfurous components removal systems may be utilized.

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Номер записи: 5
27-09-2012 дата публикации

Methanol to olefins process

Номер: US20120240615A1
Автор: Stephen De Haan
Принадлежит: Lummus Technology Inc

A process for chilling ethylene to required storage temperatures is disclosed, the process including: cooling an ethylene product from at least one of an ethylene production process and an ethylene recovery process via indirect heat exchange with a coolant at a temperature less than about −100° C. to decrease the temperature of the ethylene product; mixing a portion of the cooled ethylene product with methane to form the coolant; expanding at least one of the coolant, the methane, and the portion of the cooled ethylene to reduce a temperature of the coolant to less than −100° C. prior to the cooling; and feeding the heat exchanged coolant to at least one of the ethylene production process, the ethylene recovery process, and an open-loop refrigeration system.

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Номер записи: 6
09-05-2013 дата публикации

Carbon Dioxide Purification

Номер: US20130111949A1
Автор: David R. Koch, Loren E. Gearhart, Sanjiv N. Patel
Принадлежит: Lummus Technology Inc

A process for the recovery of carbon dioxide from a gas mixture that includes pretreating a gas mixture comprising carbon dioxide, water vapor, and one or more light gases in a pretreating system to form a cooled gas mixture, fractionating the cooled gas mixture to recover a bottoms fraction comprising carbon dioxide and an overheads fraction comprising carbon dioxide and the light gases, passing the overheads fraction over a membrane selective to carbon dioxide to separate a carbon dioxide permeate from a residue gas comprising the light gases, recycling the carbon dioxide permeate to the pretreating system, and recovering at least a portion of the bottoms fraction as a purified carbon dioxide product stream is described.

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Номер записи: 7
30-05-2013 дата публикации

Apparatus and process for separating air by cryogenic distillation

Номер: US20130133364A1
Автор: Benoit Davidian
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

In a process for delivering pressurized gas from an apparatus for separating air by cryogenic distillation, a stream of oxygen-rich liquid or gas having a nominal flow rate is withdrawn from a low-pressure column, an oxygen-rich liquid purge stream is withdrawn as bottoms from the low-pressure column and the oxygen-rich liquid purge stream is sent to a storage tank, in the event of a reduction in the production by the column system or an increase in the demand by a customer, a back-up stream is withdrawn from the storage tank and vaporized in a back-up reboiler and only if the liquid level in the storage tank exceeds a given threshold, a liquid stream is withdrawn from the storage tank constituting at most 2% of the nominal production output of the oxygen-rich stream and is sent to the back-up reboiler.

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Номер записи: 8
20-06-2013 дата публикации

Method To Produce Liquefied Natural Gas (LNG) At Midstream Natural Gas Liquids (NGLs) Recovery Plants

Номер: US20130152627A1
Автор: Jose Lourenco, Mackenzie Millar
Принадлежит: Jose Lourenco, Mackenzie Millar

A method to recover natural gas liquids (NGLs) from natural gas streams at NGL recovery plants. The present disclosure relates to methods using liquid natural gas (LNG) as an external source of stored cold energy to reduce the energy and improve the operation of NGL distillation columns. More particularly, the present disclosure provides methods to efficiently and economically achieve higher recoveries of natural gas liquids at NGL recovery plants.

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Номер записи: 9
19-12-2013 дата публикации

Natural Gas Liquefaction Process to Extend Lifetime of Gas Wells

Номер: US20130333415A1
Автор: Hans E. Kimmel
Принадлежит: Ebara International Corp

A variable speed liquid LNG expander (X1) and a variable speed two-phase LNG expander (X2) in line, downstream from X1. The rotational speed of both expanders can be controlled and changed independent from each other. The speed of expander X1 and expander X2 is determined in such way that the amount of liquid LNG downstream from the PHS compared to the feed gas supply is maximized and the amount of vapor and boil-off downstream of X2 is minimized.

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Номер записи: 10
27-02-2014 дата публикации

System for supplying fuel to high-pressure natural gas injection engine having excess evaporation gas consumption means

Номер: US20140053600A1
Автор: Dong Kyu Choi, Hyun Jun Shin, Je Heon Jung, Jung Han Lee, Seung Kyo Jung, Sung Jun Lee
Принадлежит: Daewoo Shipbuilding and Marine Engineering Co Ltd

Provided is a fuel supply system for a high-pressure natural gas injection engine. The fuel supply system includes: a BOG compression unit configured to receive BOG, which is generated in a storage tank, from the storage tank and compress the received BOG to a pressure of 12 to 45 bara; a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit; a high-pressure pump configured to compress the BOG liquefied by the reliquefaction apparatus; a high-pressure gasifier configured to gasify the BOG compressed by the high-pressure pump and supply the gasified BOG to the high-pressure natural gas injection engine; and an excess BOG consumption unit configured to consume excess BOG corresponding to a difference between an amount of BOG generated in the storage tank and an amount of BOG required as fuel for the high-pressure natural gas injection engine.

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Номер записи: 11
14-01-2016 дата публикации

Methanol to olefins process

Номер: US20160009609A1
Автор: Stephen De Haan
Принадлежит: Lummus Technology Inc

A process for chilling ethylene to required storage temperatures is disclosed, the process including: cooling an ethylene product from at least one of an ethylene production process and an ethylene recovery process via indirect heat exchange with a coolant at a temperature less than about −100° C. to decrease the temperature of the ethylene product; mixing a portion of the cooled ethylene product with methane to form the coolant; expanding at least one of the coolant, the methane, and the portion of the cooled ethylene to reduce a temperature of the coolant to less than −100° C. prior to the cooling; and feeding the heat exchanged coolant to at least one of the ethylene production process, the ethylene recovery process, and an open-loop refrigeration system.

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Номер записи: 12
19-01-2017 дата публикации

Liquefied Natural Gas Production System and Method With Greenhouse Gas Removal

Номер: US20170016667A1
Автор: Fritz Pierre, Jr., Parag A. GUPTE, Richard A. Huntington, Robert D. Denton
Принадлежит: Individual

Described herein are systems and processes to produce liquefied natural gas (LNG) using liquefied nitrogen (LIN) as the refrigerant. Greenhouse gas contaminants are removed from the LIN using a greenhouse gas removal unit.

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Номер записи: 13
18-01-2018 дата публикации

METHOD AND APPARATUS FOR PRODUCING COMPRESSED NITROGEN AND LIQUID NITROGEN BY CRYOGENIC SEPARATION OF AIR

Номер: US20180017322A1
Автор: Golubev Dimitri
Принадлежит:

A method and apparatus for producing compressed nitrogen and liquid nitrogen. A separation system has a high-pressure column, a low-pressure column with a top condenser and a main condenser. Air is compressed in an air compressor, purified, cooled in a heat exchanger and introduced into the high-pressure column. A first part of the gaseous top nitrogen from the low-pressure column becomes compressed nitrogen product. A second part of the gaseous top nitrogen is condensed in the condensing space of the top condenser and vapour is drawn off as a residual gas stream. The vapor is expanded in a first expansion machine. A second compressed nitrogen stream from the top of the high-pressure column is expanded in a second expansion machine and then drawn off as compressed nitrogen product. A part of the nitrogen condensed in the top condenser is drawn off as liquid nitrogen product. 1. Method for producing compressed nitrogen and liquid nitrogen by cryogenic separation of air in a distillation column system having a high-pressure column and a low-pressure column and also a main condenser and a low-pressure column top condenser which are both designed as condenser evaporators , wherea feed air stream is compressed in a main air compressor, is purified, cooled in a main heat exchanger and introduced into the high-pressure columna first part of the gaseous top nitrogen from the low-pressure column is drawn off as a first nitrogen stream, is heated in the main heat exchanger and is drawn off as a first compressed nitrogen product,a second part of the gaseous top nitrogen of the low-pressure column is at least partially condensed in the condensing space of the low-pressure-column top condenser,a liquid coolant stream is at least partially evaporated in the evaporating space of the low-pressure-column top condenser,the vapour produced in the evaporating space of the low-pressure-column top condenser is drawn off as a residual gas stream and is heated in the main heat exchanger to ...

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Номер записи: 14
16-01-2020 дата публикации

Method for separating components of a gas

Номер: US20200018546A1
Автор: Chris Hoeger, Jacom Chamberlain, Kyler Stitt, Larry Baxter
Принадлежит: Newvistas Capital LLC

A method is disclosed for separating components of a gas. A feed gas stream is cooled in the first vessel. The feed gas stream comprises methane, carbon dioxide, and a secondary component. A first portion of the secondary component condenses, desublimates, or a combination thereof to form a primary stream, resulting in a first depleted gas stream. The first depleted gas stream is cooled in a condensing exchanger such that a first portion of the methane condenses as a first liquid methane stream, resulting in a second depleted gas stream. The second depleted gas stream is cooled in the second vessel such that a first portion of the carbon dioxide desublimates to form a solid product stream, resulting in a third depleted gas stream.

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Номер записи: 15
16-01-2020 дата публикации

Method of separating components of a gas

Номер: US20200018547A1
Автор: Chris Hoeger, Jacom Chamberlain, Kyler Stitt, Larry Baxter
Принадлежит: Newvistas Capital LLC

A method is disclosed for separating components of a gas. A feed gas stream is passed into a vessel. The feed gas stream includes methane, carbon dioxide, and water. The feed gas stream is cooled in the vessel such that a portion of the methane and a portion of the carbon dioxide condense and a portion of the water desublimates, resulting in a product stream and a depleted gas stream exiting the vessel.

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Номер записи: 16
25-01-2018 дата публикации

METHOD FOR RECOVERING HELIUM

Номер: US20180023888A1
Автор: BAUER Heinz, BUB Andreas, Gwinner Martin, HERTEL Christoph
Принадлежит:

A method for recovering a helium product fraction () from a nitrogen- and helium-containing feed fraction () is described, wherein the nitrogen- and helium-containing feed fraction () is partially condensed (E), separated into a first helium-enriched fraction () and a first nitrogen-enriched fraction () and the former is cleaned again in an adsorptive manner. 2. The method according to claim 1 , characterized in that the third nitrogen-enriched fraction is at least partially work-performing expanded.3. The method according to claim 1 , characterized in that the separation column is operated under a pressure of 7 to 20 bar.4. The method according to claim 1 , characterized in that the third nitrogen-enriched fraction contains at least 50% of the nitrogen contained in the first nitrogen-enriched fraction.5. The method according to claim 1 , characterized in that at least a sub-flow of the second nitrogen-enriched fraction is evaporated against the nitrogen- and helium-containing feed fraction to be partially condensed under a pressure of less than 3 bar.6. The method according to claim 1 , characterized in that the adsorptive cleaning process is a (V)PSA and/or TSA process.7. The method according to claim 3 , characterized in that the separation column is operated under a pressure of 10 to 15 bar. The invention relates to a method for recovering a helium product fraction from a nitrogen- and helium-containing feed fraction, whereinThe term “helium product fraction” be comprised of highly purified helium, the concentration and contamination of which do not exceed a value of 100 vppm, preferably of 10 vppm.The term “nitrogen- and helium-containing feed fraction” be understood as a fraction, which contains 1 to 20 mol-% helium and 80 to 99 mol-% nitrogen. Further, this feed fraction can contain 0.1 to 2 mol-% methane and traces of hydrogen, argon and/or other noble gases.Currently, helium is obtained almost exclusively from a mixture of volatile natural gas components, ...

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Номер записи: 17
25-01-2018 дата публикации

Heavy Hydrocarbon Removal System for Lean Natural Gas Liquefaction

Номер: US20180023889A1
Автор: Annemarie Ott Weist, Christopher Michael Ott, Fei Chen, Mark Julian Roberts
Принадлежит: Air Products and Chemicals Inc

A system and method for integrated heavy hydrocarbon removal in a liquefaction system having a lean natural gas source. An economizer located between a main cryogenic heat exchanger and a reflux drum is provided to cool an overhead vapor stream against a partially condensed stream. In addition, pressure of the natural gas feed stream is maintained into a scrub column. A pressure drop is provided by a valve located between the economizer and the reflux drum on a partially condensed stream withdrawn from the cold end of the warm section of the main cryogenic heat exchanger.

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Номер записи: 18
25-01-2018 дата публикации

METHODS AND APPARATUS FOR MECHANICAL SEPARATION OF CO2

Номер: US20180023891A1
Автор: ABDULLAH Mohd Adlan B, AHMAD SALAM Safwan Bin, MOHD Mastura Bt, MOHD SHUKOR Mohd Syazwan Bin, RAHMAN Fadhli Hadana B, SULAIMAN Rahmah Bt
Принадлежит: Petroliam Nasional Berhad (Petronas)

A method for the separation of liquid COfrom a 2 phase feed stream, the process comprising the steps of: cooling the feed stream to a cryogenic temperature; expanding the cooled stream so as to further lower the temperature of the feed through expansion; mechanically separating the expanded stream, using a mechanical separator, into a gas phase and a liquid COphase, and; venting the gas phase and outflowing the liquid CO. 1. A method for the separation of liquid COfrom a 2 phase feed stream , the process comprising the steps of:cooling the feed stream to a cryogenic temperature;expanding the cooled stream so as to further lower the temperature of the feed through expansion;{'sub': '2', 'mechanically separating the expanded stream, using a mechanical separator, into a gas phase and a liquid COphase; and'}{'sub': '2', 'venting the gas phase and outflowing the liquid CO.'}2. The method of claim 1 , further including a separator intermediate the expanding step and the mechanical separating step;said separating step including venting a gas stream from the separator and outflowing a liquid stream to the mechanical separator.3. The method according to claim 1 , further including a re-cooling step simultaneously with the mechanical separating step claim 1 , wherein the re-cooling step includes passing an outflow of liquid CO2 from the mechanical separator through a re-cooling stage and inflowing the re-cooled liquid phase back through mechanical separator.4. The method according to claim 2 , wherein venting of the gas stream from the separator is to a first mechanical separator and outflowing of the liquid stream is to a second mechanical separator.5. The method according to claim 4 , including the steps of the first mechanical separator venting a gas stream claim 4 , and outflowing a liquid stream to the second mechanical separator.6. The method according to claim 4 , including the steps of the second mechanical separator outflowing a liquid CO2 stream claim 4 , and ...

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Номер записи: 19
05-02-2015 дата публикации

Process for liquefaction of natural gas

Номер: US20150033793A1
Автор: John L. Griffiths
Принадлежит: UOP LLC

A process and system for production of liquefied natural gas (LNG) from natural gas. The natural gas is first partially purified by removal of water and other contaminants, followed by partial chilling to freeze some contaminants and to allow for production of a purge stream to remove other contaminants. These contaminants may be removed from the stream. The process has advantages of low cost and improved removal of contaminants.

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Номер записи: 20
30-01-2020 дата публикации

PROCESS AND APPARATUS FOR THE CRYOGENIC SEPARATION OF A MIXTURE OF CARBON MONOXIDE, HYDROGEN AND METHANE FOR THE PRODUCTION OF CH4

Номер: US20200033055A1
Автор: CORTALE Manon, Demolliens Bertrand, Hernandez Antoine, TEIXEIRA Guillaume
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

In a process of the separation of a mixture of carbon monoxide, hydrogen and methane, the mixture is sent to a scrubbing column, a bottom liquid withdrawn at the bottom of the scrubbing column is depleted in hydrogen with respect to the mixture and is sent to a stripping column, a bottom liquid from the stripping column is sent to a separation column and a liquid enriched in methane withdrawn from the bottom of the separation column is vaporized in order to form a final product. 1. A process for the separation of a mixture of carbon monoxide , hydrogen and methane , the process comprising the steps of:i) sending the mixture or a fluid derived from this mixture, after cooling to a cryogenic temperature in a heat exchanger, to a scrubbing column fed at the top with a liquid containing at least 80 mol % of carbon monoxide or to at least one phase separator;ii) withdrawing a bottom liquid at the bottom of the scrubbing column or of the phase separator or of one of the phase separators is depleted in hydrogen with respect to the mixture and is sent to a stripping column;iii) withdrawing a gas at the top of the stripping column;iv) sending a bottom liquid from the stripping column to a separation column; andv) withdrawing a liquid enriched in methane from the bottom of the separation column and vaporized in the heat exchanger in order to form a final product,wherein the vaporized liquid enriched in methane is compressed in a compressor and a part of the compressed gas is returned at the bottom of the separation column for separation therein.2. The process according to claim 1 , in which the part of the compressed gas is at a lower pressure than that of the compressed final product.3. The process according to claim 1 , in which the scrubbing column is fed at the top with a liquid originating from a condenser where at least a part of the gas from the top of the scrubbing column or originating from the top of the separation column or originating from a cycle for ...

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Номер записи: 21
08-02-2018 дата публикации

PROCESS INTEGRATION OF A GAS PROCESSING UNIT WITH LIQUEFACTION UNIT

Номер: US20180038642A1
Автор: Guillard Alain, Roesch Alexander, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

It is proposed to integrate a gas processing unit with a liquefaction unit. The industrial gas stream may be but is not limited to air gases of oxygen, nitrogen argon, hydrocarbon, LNG, syngas or its components, CO, or any other molecule or combination of molecules. It is proposed to integrate the underutilized process inefficiencies of a gas processing unit into the liquefaction unit to produce a liquid at a reduced operating cost. The gas processing unit may be any system or apparatus which alters the composition of a feed gas. Examples could be, but are not limited to, a methanol plant, steam methane reformer, cogeneration plant, and partial oxidation unit. 1. A process for the production of a liquid by integration of a gas processing unit and a liquefaction unit , the process comprising the steps of:a) providing a gas processing unit;b) providing a liquefaction unit, wherein the liquefaction unit is in fluid communication with the gas processing unit, such that the liquefaction unit and the gas processing unit are configured to send and receive fluids from each other;c) extracting a letdown energy from a high pressure gas to produce refrigeration to be used within the liquefaction unit, thereby producing a low pressure gas, wherein the low pressure gas is then used by the gas processing unit as a low pressure feedstream;d) liquefying an industrial gas within the liquefaction unit using refrigeration produced in step c).2. The process as claimed in claim 1 , wherein the gas processing unit is selected from the group consisting of a methanol plant claim 1 , a steam methane reformer claim 1 , a cogeneration plant claim 1 , a partial oxidation unit claim 1 , an autothermal reforming unit claim 1 , and combinations thereof.3. The process as claimed in claim 1 , wherein the industrial gas is selected from the group consisting of an air gas claim 1 , a hydrocarbon claim 1 , syngas claim 1 , carbon dioxide claim 1 , hydrogen claim 1 , carbon monoxide claim 1 , and ...

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Номер записи: 22
07-02-2019 дата публикации

Recovery Of Helium From Nitrogen-Rich Streams

Номер: US20190041128A1
Автор: Berger Alan, Higginbotham Paul, Palamara John Eugene, White Vincent
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

Overall power consumption in a cryogenic distillation process for recovering helium from nitrogen-rich gases comprising helium may be reduced if the feed to the distillation column system is at least substantially condensed by indirect heat exchange against a first bottoms liquid at first pressure, and a second bottoms liquid at a second pressure that is different from the first pressure. 1. Apparatus for recovering helium from a nitrogen-rich feed gas comprising helium , said apparatus comprising:a distillation column system for operation at an elevated operating pressure to separate at least partially condensed feed gas into helium-enriched overhead vapor and nitrogen-enriched bottoms liquid(s);an overhead condenser for partially condensing helium-enriched overhead vapor by indirect heat exchange to produce helium-enriched vapor as product and liquid for reflux in the column system;a first heat exchange system for cooling feed gas by indirect heat exchange with a first nitrogen-enriched bottoms liquid to produce cooled feed gas and vapor for the column system;a first pressure reduction device for reducing the pressure of a second nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid;a second heat exchange system for cooling said cooled feed gas by indirect heat exchange against said reduced pressure bottoms liquid to produce at least partially condensed feed gas and vaporized bottoms liquid; anda second pressure reduction device for reducing the pressure of said at least partially condensed feed gas to produce at least partially condensed feed gas at reduced pressure for use as said feed to the distillation column system.2. The apparatus of comprising a third pressure reduction device for reducing the pressure of a third nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid for vaporization by indirect heat exchange in said overhead condenser to produce nitrogen-enriched vapor.3. The apparatus of comprising an expander ...

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Номер записи: 23
16-02-2017 дата публикации

Method for purifying, cooling and separating a gaseous mixture and associated apparatus

Номер: US20170045291A1
Автор: Antony CORREIA ANACLETO, Benoit Davidian, Bernard Saulnier, Clement Lix, Erwan LE GULUDEC, Guillaume Cardon, Quentin Saniez
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

The invention relates to a method for cooling, purifying and separating a gaseous mixture containing at least one impurity, in which the gaseous mixture is cooled to a temperature no higher than the temperature at which the at least one impurity solidifies in a heat exchanger having cooling passages, the cooling passages being at least partially covered with a coating and/or physically treated and/or chemically treated, the coating and/or the treatment serving to limit or even prevent the solidified impurity from forming and/or adhering to a surface of the passages; at least one portion of the solidified impurity exiting the cooling passages of the heat exchanger is collected; and the gaseous mixture is withdrawn from the heat exchanger.

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Номер записи: 24
15-02-2018 дата публикации

SYSTEMS AND METHODS FOR CAPTURING NATURAL GAS LIQUIDS FROM OIL TANK VAPORS

Номер: US20180045460A1
Автор: Hotton Kevin, LEWIS Matthew, Sargsyan Gevorg, Young Andrew C., Zubrin Robert M.
Принадлежит:

A hydrocarbon vapor capture and processing system is disclosed to reduce both carbon emissions and conventional pollution, while producing financial returns by turning waste vapors into high quality NGLs. In one embodiment, the hydrocarbon vapor is sent to a compressor for compression. Compressed vapor is then cooled via an air cooler, before being condensed by a refrigerator to form a liquid. The resulting two-phase flow is then separated into a dry gas stream and a liquid stream using a cyclonic separator. The dry gas stream may be transmitted as a light gas to sales line. The resulting liquid stream is passed to a stripping column to produce NGLs. The system offers great benefits to the environment and public health, by providing a technology that drastically cuts carbon emissions and noxious pollution, while incentivizing drillers to implement such measures through its ability to produce revenue. 1. An apparatus to capture natural gas liquids (NGLs) from oil tanks , comprising:a compressor to withdraw hydrocarbon vapors from the oil tanks; anda cooling system to condense liquids from said hydrocarbon vapors resulting in a natural gas liquids (NGLs) stream and a light gas stream.2. The apparatus of claim 1 , wherein the compressor is connected to a refrigerated evaporator to condense liquid components of the hydrocarbon vapors.3. The apparatus of claim 2 , wherein the refrigerated evaporator is connected to a cyclonic separator.4. The apparatus of claim 3 , wherein liquid product from the cyclonic separator connects into a stripping column warmed from below by a reboiler.5. The apparatus of claim 4 , wherein the stripping column and the reboiler remove dissolved air claim 4 , methane claim 4 , and excess ethane from the hydrocarbon vapors.6. The apparatus of claim 5 , wherein the cyclonic separator claim 5 , the stripping column and the reboiler are integrated into a single unit.7. The apparatus of claim 6 , wherein the compressor is powered by the light gas ...

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Номер записи: 25
14-02-2019 дата публикации

METHODS FOR PROVIDING REFRIGERATION IN NATURAL GAS LIQUIDS RECOVERY PLANTS

Номер: US20190049176A1
Автор: MCCOOL Grant L., PUIGBO Arturo, WALTER Thomas
Принадлежит: Linde Engineering North America Inc.

A process and plant for natural gas liquids (NGL) recovery includes a main heat exchanger, a cold gas/liquid separator, a separation or distillation column, and an overhead gas heat exchanger. A pressurized residue gas generated from an overhead gas stream removed the top of the separation or distillation column is expanded and used as a cooling medium in the overhead gas heat exchanger and the main heat exchanger. The expanded residue gas, used as a cooling medium, is then compressed up to a pressure to be combined with the overhead stream from the separation or distillation column. 1. A process for natural gas liquids (NGL) recovery comprising:introducing a natural gas feed stream into a main heat exchanger wherein the feed stream is cooled and partially condensed,introducing the partially condensed feed stream into a cold gas/liquid separator wherein the partially condensed feed stream is separated into a liquid fraction and a gaseous fraction,introducing the liquid fraction into a separation or distillation column,separating the gaseous fraction into a first portion and a second portion,cooling the first portion of the gaseous fraction in an overhead heat exchanger by indirect heat exchange with an overhead gaseous stream removed from the top of the separation or distillation column, and introducing the cooled and partially condensed first portion of the gaseous fraction into the separation or distillation column at a point above the introduction point of the liquid fraction into the separation or distillation column,expanding the second portion of the gaseous fraction and introducing the expanded second portion of the gaseous fraction into the separation or distillation column at a point above the introduction point of the liquid fraction into the separation or distillation column,removing a C2+ or C3+ liquid product stream (NGL) from the bottom of the separation or distillation column,removing the overhead gaseous stream from the top of the separation or ...

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Номер записи: 26
01-03-2018 дата публикации

METHODS AND CONFIGURATIONS FOR LNG LIQUEFACTION

Номер: US20180058753A1
Автор: Borsos Steven, Mak John, Patel Dhirav, THOMAS Jacob
Принадлежит:

Embodiments relate generally to systems and methods for pre-cooling a natural gas stream to a liquefaction plant. A system may comprise a compressor configured to receive a first natural gas stream at a first pressure and produce a second natural gas stream at a second pressure; an exchanger, wherein the exchanger is configured to receive the second natural gas stream as the second pressure and cool the second natural gas stream to produce a cooled natural gas stream; and an expander, wherein the expander is configured to receive the cooled natural gas stream and expand the cooled natural gas stream from the second pressure to a third pressure. 1. A system for pre-cooling a natural gas stream to a liquefaction plant , the system comprising:a compressor configured to receive a first natural gas stream at a first pressure and produce a second natural gas stream at a second pressure;an exchanger, wherein the exchanger is configured to receive the second natural gas stream at the second pressure and cool the second natural gas stream to produce a cooled natural gas stream; andan expander, wherein the expander is configured to receive the cooled natural gas stream and expand the cooled natural gas stream from the second pressure to a third pressure.2. The system of claim 1 , wherein the exchanger is an ambient air exchanger configured to exchange heat between the second natural gas stream at the second pressure and an ambient air stream.3. The system of claim 1 , further comprising:a second compressor configured to receive a natural gas feed stream at a fourth pressure and produce a fourth natural gas stream at the first pressure, wherein the first pressure is higher than the fourth pressure; anda second exchanger, wherein the second exchanger is configured to receive the fourth natural gas stream at the first pressure and cool the natural gas stream to produce the first natural gas stream.4. The system of claim 3 , wherein the natural gas stream at the third pressure is ...

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Номер записи: 27
04-03-2021 дата публикации

Liquefaction of Production Gas

Номер: US20210063083A1
Автор: Kaminsky Robert D., Staedter Marcel
Принадлежит: EXXONMOBIL UPSTREAM RESEARCH COMPANY

A method and apparatus for liquefying a feed gas stream comprising natural gas and carbon dioxide. A method includes compressing an input fluid stream to generate a first intermediary fluid stream; cooling the first intermediary fluid stream with a first heat exchanger to generate a second intermediary fluid stream, wherein a temperature of the second intermediary fluid stream is higher than a carbon dioxide-freezing temperature for the second intermediary fluid stream; expanding the second intermediary fluid stream to generate a third intermediary fluid stream, wherein the third intermediary fluid stream comprises solid carbon dioxide; separating the third intermediary fluid stream into a fourth intermediary fluid stream and an output fluid stream, wherein the output fluid stream comprises a liquefied natural gas (LNG) liquid; and utilizing the fourth intermediary fluid stream as a cooling fluid stream for the first heat exchanger. 1. A method , comprising:compressing an input fluid stream to generate a first intermediary fluid stream;cooling the first intermediary fluid stream with a first heat exchanger to generate a second intermediary fluid stream, wherein a temperature of the second intermediary fluid stream is higher than a carbon-dioxide-freezing temperature for the second intermediary fluid stream;expanding the second intermediary fluid stream to generate a third intermediary fluid stream, wherein the third intermediary fluid stream comprises solid carbon dioxide;separating the third intermediary fluid stream into a fourth intermediary fluid stream and an output fluid stream, wherein the output fluid stream comprises a liquefied natural gas (LNG) liquid; andutilizing the fourth intermediary fluid stream as a first cooling fluid stream for the first heat exchanger.2. The method of claim 1 , further comprising claim 1 , after utilizing the fourth intermediary fluid stream as the cooling fluid stream claim 1 , burning the fourth intermediary fluid stream.3. ...

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Номер записи: 28
11-03-2021 дата публикации

SYSTEM AND METHOD OF RECOVERING CARBON DIOXIDE FROM AN EXHAUST GAS STREAM

Номер: US20210069632A1
Автор: DiPietro Joseph Philip, Hofer Douglas Carl
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A carbon dioxide capture system includes a first heat exchanger configured to exchange heat between an exhaust stream and a lean carbon dioxide effluent stream. The carbon dioxide capture system also includes a first turboexpander including a first compressor driven by a first turbine. The first compressor is coupled in flow communication with the first heat exchanger. The first turbine is coupled in flow communication with the first heat exchanger and configured to expand the lean carbon dioxide effluent stream. The carbon dioxide capture system further includes a carbon dioxide membrane unit coupled in flow communication with the first compressor. The carbon dioxide membrane unit is configured to separate the exhaust stream into the lean carbon dioxide effluent stream and a rich carbon dioxide effluent stream. The carbon dioxide membrane unit is further configured to channel the lean carbon dioxide effluent stream to the first heat exchanger. 1. A carbon dioxide capture system comprising:a first heat exchanger configured to exchange heat between an exhaust stream and a lean carbon dioxide effluent stream; a compressor coupled in flow communication with said first heat exchanger and configured to compress the exhaust stream; and', 'a turbine coupled in flow communication with said first heat exchanger, said compressor driven by said turbine, said turbine configured to expand the lean carbon dioxide effluent stream; and, 'at least one turboexpander comprisinga carbon dioxide membrane unit coupled in flow communication with said compressor, said carbon dioxide membrane unit configured to separate the exhaust stream into the lean carbon dioxide effluent stream and a rich carbon dioxide effluent stream, said carbon dioxide membrane unit further configured to channel the lean carbon dioxide effluent stream to said first heat exchanger.2. The carbon dioxide capture system in accordance with claim 1 , further comprising a cryogenic separation unit coupled in flow ...

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Номер записи: 29
08-03-2018 дата публикации

PRETREATMENT OF NATURAL GAS PRIOR TO LIQUEFACTION

Номер: US20180066889A1
Автор: Gaskin Thomas K., Guvelioglu Galip H., Palacios Vanessa M., Yamin Fereidoun
Принадлежит:

Method and system for removing high freeze point components from natural gas. Feed gas is cooled in a heat exchanger and separated into a first vapor portion and a first liquid portion. The first liquid portion is reheated using the heat exchanger and separated into a high freeze point components stream and a non-freezing components stream. A portion of the non-freezing components stream may be at least partially liquefied and received by an absorber tower. The first vapor portion may be cooled and received by the absorber tower. An overhead vapor product which is substantially free of high freeze point freeze components and a bottoms product liquid stream including freeze components and non-freeze components are produced using the absorber tower. 1. A method for removing high freeze point components from natural gas , comprising:cooling a feed gas in a heat exchanger;separating the feed gas into a first vapor portion and a first liquid portion in a separation vessel;reheating the first liquid portion using the heat exchanger;separating the reheated first liquid portion into a high freeze point components stream and a non-freezing components stream;at least partially liquefying the non-freezing components stream;receiving, at an upper feed point of an absorber tower, the at least partially liquefied non-freezing component stream;receiving, at a lower feed point of the absorber tower, the first vapor portion of the separated feed gas that has been cooled;producing, using the absorber tower, an overhead vapor product which is substantially free of high freeze point freeze components and a bottoms product liquid stream including freeze components and non-freeze components; andreheating the overhead vapor product from the absorber tower using the heat exchanger.2. The method of claim 1 , wherein the absorber tower includes one or more mass transfer stages.3. The method of claim 1 , further comprising compressing the reheated overhead vapor product using an expander- ...

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Номер записи: 30
07-03-2019 дата публикации

System and method for recovery of non-condensable gases such as neon, helium, xenon, and krypton from an air separation unit

Номер: US20190072326A1
Автор: Hanfei Tuo, James R. Dray, Maulik R. Shelat, Nick J. Degenstein, Vijayaraghavan S. Chakravarthy
Принадлежит: Praxair Technology Inc

A system and method for recovery of rare gases such as neon, helium, xenon, and krypton in an air separation unit is provided. The rare gas recovery system comprises a non-condensable stripping column linked in a heat transfer relationship with a xenon-krypton column via an auxiliary condenser-reboiler. The non-condensable stripping column produces a rare gas containing overhead that is directed to the auxiliary condenser-reboiler where most of the neon is captured in a non-condensable vent stream that is further processed to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. The xenon-krypton column further receives two streams of liquid oxygen from the lower pressure column and the rare gas containing overhead from the non-condensable stripping column and produces a crude xenon and krypton liquid stream and an oxygen-rich overhead.

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Номер записи: 31
16-03-2017 дата публикации

Method and system to control the methane mass flow rate for the production of liquefied methane gas (lmg)

Номер: US20170074583A1
Автор: Alain Roy, Charles Tremblay, Simon Jasmin
Принадлежит: RTJ TECHNOLOGIES Inc

The system is provided for generating a mixed methane gas feed stream using at least one source of biogas and an alternate source of methane gas. The system includes a biogas subsystem, a control device for the methane gas from the at least one alternate source of methane gas, and a vertically-extending gas mixing vessel. A method of controlling a methane gas mass flow rate of a mixed methane gas feed stream is also disclosed. The proposed concept is particularly well adapted for situations where an uninterrupted and relatively constant input of methane gas is required to ensure an optimum operation of, for instance, a LMG production plant.

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Номер записи: 32
05-03-2020 дата публикации

System and Method for Separating Natural Gas Liquid and Nitrogen from Natural Gas Streams

Номер: US20200072547A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for removing nitrogen and producing a high pressure methane product stream and an NGL product stream from natural gas feed streams where at least 90%, and preferably at least 95%, of the ethane in the feed stream is recovered in the NGL product stream. The system and method of the invention are particularly suitable for use with feed streams in excess of 5 MMSCFD and up to 300 MMSCFD and containing around 5% to 80% nitrogen. The system and method preferably combine use of strategic heat exchange between various process streams with a high pressure rectifier tower and the ability to divert all or a portion of a nitrogen rejection unit feed stream to optionally bypass a nitrogen fractionation column to reduce capital costs and operating expenses. 1. A system for removing nitrogen from a feed stream comprising nitrogen , methane , ethane , and other components to produce a methane product stream , an NGL product stream , and a nitrogen vent stream the system comprising:a first separator wherein the feed stream is separated into a first overhead stream and a first bottoms stream;a first fractionating column wherein the first overhead stream is separated into a second overhead stream and a second bottoms stream;an expander for expanding the first overhead stream prior to the first fractionating column;a second fractionating column wherein the first bottoms stream and second bottoms stream are separated into a third overhead stream and a third bottoms stream;a third fractionating column wherein at least a first NRU feed stream separated into a fourth overhead stream and a fourth bottoms stream;a first heat exchanger for cooling a first portion of the feed stream prior to the first separator and cooling a first portion of the second overhead stream prior to the third fractionating column through heat exchange with the fourth bottoms stream and a recycle refrigerant stream;a second heat exchanger for cooling the first portion of the second overhead ...

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Номер записи: 33
22-03-2018 дата публикации

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20180080708A1
Автор: Howard Henry E.
Принадлежит:

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A method for purifying a hydrogen , nitrogen , methane and argon containing feed stream to produce a hydrogen and nitrogen containing synthesis gas and a methane fuel gas , the method comprising the steps of:conditioning the feed stream to a temperature near saturation at a pressure greater than about 300 psia;directing the conditioned feed stream to a synthesis gas rectification column configured to produce an hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;directing the methane-rich condensed phase stream to a hydrogen stripping column configured to strip hydrogen from the methane-rich condensed phase stream and produce a hydrogen free methane bottom stream and a hydrogen enriched gaseous overhead;vaporizing the hydrogen free methane bottom stream to produce a vaporized or partially vaporized hydrogen free methane-rich stream;warming the hydrogen and nitrogen enriched overhead vapor stream via indirect heat exchange with the feed stream to produce the hydrogen and nitrogen containing synthesis gas; andwarming the vaporized or partially vaporized hydrogen free methane-rich stream via indirect heat exchange with the feed stream to produce the methane fuel gas.2. The method of claim 1 , ...

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Номер записи: 34
22-03-2018 дата публикации

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20180080709A1
Автор: Howard Henry E.
Принадлежит:

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A method for purifying a stream comprising hydrogen , nitrogen , methane and argon to produce a hydrogen and nitrogen containing synthesis gas , a methane rich fuel gas , and at least one nitrogen product , the method comprising the steps of:conditioning the pre-purified feed stream to a temperature near saturation at a pressure greater than about 300 psia;directing the conditioned feed stream to a synthesis gas rectification column configured to produce an hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;vaporizing the methane-rich condensed phase stream to produce a vaporized or partially vaporized methane-rich stream;directing the vaporized or partially vaporized methane-rich stream and a nitrogen reflux stream to a nitrogen rectification column configured to produce a nitrogen containing overhead vapor stream substantially free of methane, and a methane enriched liquid bottoms stream;warming at least a portion of the nitrogen containing overhead vapor stream via indirect heat exchange with the feed stream to produce a warm gaseous nitrogen stream and directing the warm gaseous nitrogen stream to a nitrogen recovery system to produce the at least one nitrogen product;warming the ...

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Номер записи: 35
22-03-2018 дата публикации

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20180080710A1
Автор: Howard Henry E.
Принадлежит:

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A cryogenic purification system configured for purifying a hydrogen , nitrogen , methane and argon containing feed stream , the system comprising:a synthesis gas rectification column configured to receive the feed stream and produce a hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;a hydrogen stripping column configured to receive the methane-rich condensed phase stream from the synthesis gas rectification column, strip hydrogen from the methane-rich condensed phase stream and produce a hydrogen free methane bottom stream and a hydrogen enriched gaseous overhead;a condenser configured to receive the hydrogen free methane bottom stream and a working fluid and to produce a vaporized or partially vaporized hydrogen free methane-rich stream; anda heat exchanger configured to (a) warm the hydrogen and nitrogen enriched overhead vapor stream via indirect heat exchange with the feed stream to produce a hydrogen and nitrogen containing synthesis gas; and (b) to warm the vaporized or partially vaporized hydrogen free methane-rich stream via indirect heat exchange with the feed stream to produce a methane fuel gas.2. The system of claim 1 , further comprising a compressor disposed upstream of ...

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Номер записи: 36
12-03-2020 дата публикации

Cryogenic air separation unit with flexible liquid product make

Номер: US20200080773A1
Автор: Hanfei Tuo, Maulik R. Shelat, Nick J. Degenstein, Zhengrong Xu
Принадлежит: Individual

A cryogenic air separation unit that provides flexibility in the production of liquid products is disclosed. The present cryogenic air separation unit and associated operating methods involves the use of a dual nozzle arrangement for the main heat exchanger that allows a turbine air stream draw from the main heat exchanger at different temperatures to provide refrigeration to the cryogenic air separation unit which, in turn, enables different production modes for the various liquid products.

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Номер записи: 37
25-03-2021 дата публикации

METHOD FOR PRODUCING PURE NITROGEN FROM A NATURAL GAS STREAM CONTAINING NITROGEN

Номер: US20210088276A1
Автор: LICHTLE Sébastien, MUHR Marie, PARADOWSKI Henri
Принадлежит:

A process for liquefying a natural gas feed stream including cooling a feed gas stream to obtain a liquefied natural gas stream; introducing the liquefied natural gas stream into a deazotization column to produce a liquefied natural gas stream and a nitrogen-enriched vapor stream; at least partially condensing at least part of the nitrogen-enriched vapor stream to produce a two-phase stream; introducing the two-phase stream into a phase-separating vessel to produce a first liquid stream and a first nitrogen-enriched gas stream; introducing at least part of the nitrogen-enriched gas stream into a distillation column thereby producing a second nitrogen-enriched stream containing less than 1 mol % of methane and a second liquid stream containing less than 10 mol % of nitrogen; wherein at least part of the liquefied natural gas stream is used to cool the at least part of the nitrogen-enriched vapor stream in said heat exchanger. 113.-. (canceled)15. The process of claim 14 , wherein the natural gas feed stream and a second coolant mixture are cooled by indirect heat exchange with at least one first coolant mixture to obtain a cooled natural gas and a second cooled coolant mixture claim 14 , and the cooled natural gas is then condensed and cooled by indirect heat exchange with at least the second cooled coolant mixture to obtain a liquefied natural gas.16. The process of claim 14 , wherein the second nitrogen-enriched stream contains less than 100 molar ppm of methane and the second liquid stream contains less than 4 mol % of nitrogen.172. The process of claim 14 , wherein the liquefied natural gas stream is cooled in a reboiling means of said deazotization column down to the temperature T.182. The process of claim 14 , wherein the stream cooled to the temperature T is expanded in an expansion means before being introduced into the deazotization column.19. The process of claim 14 , wherein at least part of the first liquid stream is used as reflux at the top of the ...

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Номер записи: 38
25-03-2021 дата публикации

Process for Separating Hydrogen from an Olefin Hydrocarbon Effluent Vapor Stream

Номер: US20210088278A1
Автор: Zhao James, Zhao Shukui
Принадлежит: EnFlex, Inc.

One or more specific embodiments disclosed herein includes a method for separating hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream, employing a single heat exchanger, multiple gas-liquid separators, multiple expander/compressor sets, and a rectifier attached to a liquid product drum. 1. A process for the separation of hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream from a dehydrogenation unit , which process comprises:a. cooling a compressed effluent vapor stream in a heat exchanger, wherein the heat exchanger comprises a warm section and a cold section;b. separating hydrogen from olefin and heavy paraffinic components in the cooled compressed effluent vapor stream in a first separator to provide a first vapor stream and a first liquid stream;c. cooling the first vapor stream in the heat exchanger;d. separating hydrogen from olefin and heavy paraffinic components in the cooled first vapor stream in a second separator to provide a second vapor stream and a second liquid stream;e. warming the second vapor stream in the heat exchanger;f. isentropically expanding, in a high-pressure expander, the second vapor stream, wherein the pressure and temperature of the second vapor stream are lowered;g. warming the second vapor stream in the heat exchanger;h. compressing, in a high-pressure compressor, the second vapor stream;i. cooling the second vapor stream in a first discharge cooler;j. dividing the second vapor stream into a gas product and a split stream;k. withdrawing a gas product;l. compressing, in a low-pressure compressor, the split stream;m. cooling the split stream in a second discharge cooler and further cooling the split stream in the heat exchanger;n. isentropically expanding, in a low-pressure expander, the split stream, wherein the pressure and temperature of the split stream are lowered;o. cooling a liquid paraffinic stream in the heat exchanger;p. combining the cooled liquid paraffinic stream with the ...

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Номер записи: 39
01-04-2021 дата публикации

Method for the production of air gases by the cryogenic separation of air with improved front end purification and air compression

Номер: US20210095922A1
Автор: Minh PHAM-HUY, Paul Kong, Wendy YIP
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

A method and apparatus for the production of air gases by the cryogenic separation of air with front end purification and air compression can include using an available compressed dry gas such as nitrogen, oxygen, stored purified air, or synthetic air to repressurize the adsorber without diverting any of the purified air just exiting the currently on-line adsorber or changing the flow rate of the main air compressor or air sent to the cold box. This enables the main air compressor (MAC) to operate at a relatively constant flow rate while also sending a relatively constant air flow to the cold box during this repressurization step, thereby reducing the risks of process upsets and minimizing capital expenditures related to the MAC and other warm-end equipments.

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Номер записи: 40
12-04-2018 дата публикации

FACILITY AND METHOD FOR PRODUCING LIQUID HELIUM

Номер: US20180100696A1
Автор: ALI SAID Rawia, Bernhardt Jean-Marc, Demolliens Bertrand, Hernandez Antoine, Peyron Jean-Marc, PICHOT Delphine, Tsevery Jean-Marc
Принадлежит: L'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude

The invention relates to a facility for producing liquid helium from a source gas mixture substantially comprising nitrogen and helium. The facility includes a cryogenic purifier including a system for separating the nitrogen from the source gas mixture with a view to producing helium at a temperature lower than the temperature of the source gas. The facility also includes a helium liquefier that subjects the helium to a work cycle including, in series: compressing the helium, cooling and decompressing the compressed helium, and reheating the cooled, decompressed helium. The facility includes a helium transfer pipe connecting an outlet of the purifier to an inlet of the liquefier in order to transfer helium produced by the purifier into the work cycle of the liquefier. The facility is characterized in that the cryogenic purifier includes a decompression system that includes an inlet to be connected to a source of pressurized nitrogen gas. Said system for decompressing the nitrogen gas exchanges heat with the separation system in order to transfer cold from the decompressed nitrogen gas to said separation system. 110-. (canceled)11. A facility for producing liquid helium from a source gas mixture comprising nitrogen and helium , the facility comprising:a cryogenic purifier comprising a circuit for separating nitrogen from the source gas mixture with a view to producing helium at a temperature below a temperature of the source gas;a helium liquefier that subjects the helium to a work cycle comprising in series:a compression of the helium, a cooling and an expansion of the compressed helium and a reheating of the cooled and expanded helium; and the cryogenic purifier further comprises an expansion circuit that comprises an inlet intended to be connected to a source of pressurized gaseous nitrogen;', 'the circuit for expanding the gaseous nitrogen is in heat exchange with the separation circuit in order to transfer frigories from the expanded gaseous nitrogen to said ...

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Номер записи: 41
13-04-2017 дата публикации

METHOD AND ARRANGEMENT FOR PRODUCING LIQUEFIED METHANE GAS (LMG) FROM VARIOUS GAS SOURCES

Номер: US20170102182A1
Автор: JASMIN SIMON, ROY Alain, TREMBLAY Charles
Принадлежит:

The method is carried out for continuously producing a liquefied methane gas (LMG) from a pressurized mixed methane gas feed stream. It is particularly well adapted for use in relatively small LMG distributed production plant, for instance those ranging from 400 to 15,000 MT per year, and/or when the mixed methane gas feed stream has a wide range of nitrogen-content proportions, including nitrogen being substantially absent. The proposed concept can also be very useful in the design of medium-scale and/or large-size plants, including ones where the nitrogen content always remains above a certain threshold. The methods and arrangements proposed herein can mitigate losses of methane gas when venting nitrogen, for instance in the atmosphere. 1. A method of continuously producing a liquefied methane gas (LMG) from a pressurized mixed methane gas feed stream , the mixed methane gas feed stream containing methane and a variable concentration of nitrogen within a range that includes nitrogen being substantially absent from the mixed methane gas feed stream , the method including the simultaneous steps of:(A) passing the mixed methane gas feed stream through a first heat exchanger and then through a second heat exchanger to condense at least a portion of the mixed methane gas feed stream, the first heat exchanger using a first cryogenic refrigerant and the second heat exchanger using a second cryogenic refrigerant;(B) sending the mixed methane gas feed stream coming out of the second heat exchanger though a mid-level inlet of a fractional distillation column;(C) when nitrogen is present in the mixed methane gas feed stream, separating the mixed methane gas feed stream inside the fractional distillation column into a methane-rich liquid fraction and a nitrogen-rich gas fraction;(D) withdrawing the methane-rich liquid fraction accumulating at a bottom of the fractional distillation column through a bottom outlet, the methane-rich liquid fraction constituting the LMG;(E) ...

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Номер записи: 42
25-04-2019 дата публикации

Apparatus and method for separating co2 at low temperature comprising a step of separation by permeation

Номер: US20190118134A1
Автор: Frederick Lockwood, Ludovic Granados, Mathieu LECLERC, Paul TERRIEN
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

In a method for separating a mixture containing carbon dioxide, the mixture is cooled in a heat exchanger and partially condensed and a first liquid is separated from the mixture in a first system operating at low temperature comprising at least one first phase separator and a gas from the first system is treated in a membrane system to produce a permeate and a non-permeate, the gas from the first system being divided into two portions, a first portion being sent to the membrane system without being heated and a second portion being heated to at least an intermediate temperature of the heat exchanger and then sent to the membrane system without being cooled.

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Номер записи: 43
04-05-2017 дата публикации

ENHANCED LOW TEMPERATURE SEPARATION PROCESS

Номер: US20170122658A1
Автор: Currence Kevin L.
Принадлежит:

Enhanced low temperature separation (LTS) processes are provided for separating light hydrocarbon components from heavy hydrocarbon components. The enhanced LTS process utilizes an absorber and a de-ethanizer tower to achieve sufficiently pure natural gas liquid (NGL) products and residue gas products. A portion of the de-ethanizer tower overhead is condensed and recycled as reflux for the absorber. The enhanced LTS process requires less refrigeration of the feed gas stream yet still achieves increased recovery of the valuable heavier hydrocarbons from hydrocarbon gas streams. The enhanced LTS process also reduces compression requirements compared to conventional LTS processes. 1. An enhanced low temperature process for separating light hydrocarbon components from heavy hydrocarbon components in a feed stream , said process comprising:cooling said feed stream by directing said feed stream through at least one heat exchanger so as to condense at least a portion of said feed stream;directing said partially condensed feed stream into an absorber and producing from the absorber an absorber overhead vapor stream and an absorber liquid bottoms stream;flashing said absorber liquid bottoms stream into a de-ethanizer tower, thereby producing a de-ethanizer overhead vapor stream and a liquid product stream enriched in C3+ hydrocarbon compounds;condensing at least a portion of said de-ethanizer overhead vapor stream to form a liquid reflux stream and using a first portion of the liquid reflux stream as reflux in the de-ethanizer tower;combining said absorber overhead vapor stream with a second portion of the liquid reflux stream to produce a two-phase absorber recycle stream; anddirecting at least a portion of said absorber recycle stream to said absorber as liquid reflux.2. The process of claim 1 , wherein said feed stream is a dehydrated natural gas stream.3. The process of claim 1 , wherein said feed stream is split into two or more portions claim 1 , wherein one of said ...

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Номер записи: 44
25-04-2019 дата публикации

PHASE IMPLEMENTATION OF NATURAL GAS LIQUID RECOVERY PLANTS

Номер: US20190120550A1
Автор: Mak John
Принадлежит:

Embodiments relate generally to systems and methods for operating a natural gas liquids plant in ethane rejection and in ethane recovery. A natural gas liquid plant may comprise an absorber configured to produce an ethane rich bottom stream and an ethane depleted vapor stream; a stripper fluidly coupled to the absorber configured to, during ethane rejection, fractionate the ethane rich bottom stream from the absorber into an ethane overhead product and a propane plus hydrocarbons product, and configured to, during ethane recovery, fractionate the ethane rich bottom stream into an ethane plus NGL stream and an overhead vapor stream; and an exchanger configured to, during ethane recovery, counter-currently contact the ethane rich bottom stream from the absorber with the ethane depleted vapor stream from the absorber, thereby heating the vapor stream and chilling the ethane rich bottom stream before the ethane rich bottom stream is fed to the stripper. 1. A natural gas liquid plant configured to operate in either ethane rejection or ethane recovery , the plant comprising:an absorber configured to produce an ethane rich bottom stream and an ethane depleted vapor stream;a stripper fluidly coupled to the absorber configured to, during ethane rejection, fractionate the ethane rich bottom stream from the absorber into an ethane overhead product and a propane plus hydrocarbons product, and configured to, during ethane recovery, fractionate the ethane rich bottom stream into an ethane plus NGL stream and an overhead vapor stream; andan expander configured to, during ethane recovery, expand a vapor portion of a feed gas to the plant, and feed the expanded stream to the absorber.2. The plant of claim 1 , further comprising an exchanger configured to claim 1 , during ethane recovery claim 1 , counter-currently contact the ethane rich bottom stream from the absorber with the ethane depleted vapor stream from the absorber claim 1 , thereby heating the vapor stream and chilling the ...

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Номер записи: 45
02-05-2019 дата публикации

PROCESS AND PLANT FOR THE COMBINATION PRODUCTION OF A MIXTURE OF HYDROGEN AND NITROGEN AND ALSO OF CARBON MONOXIDE BY CRYOGENIC DISTILLATION AND CRYOGENIC SCRUBBING

Номер: US20190128601A1
Автор: Demolliens Bertrand
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

Process for the combined production of a mixture of hydrogen and nitrogen, and of carbon monoxide by cryogenic distillation and cryogenic scrubbing, wherein a methane-rich liquid is introduced at a first intermediate level of a scrubbing column as first scrubbing liquid and at least one nitrogen-rich liquid is introduced at a level higher than the first level of the scrubbing column as second scrubbing liquid and a mixture of hydrogen and nitrogen is drawn off as overhead gas from the scrubbing column. 110-. (canceled)11. A process for the combined production of a mixture of hydrogen and nitrogen , of carbon monoxide by cryogenic distillation and cryogenic scrubbing , wherein the process comprises the steps of:i) cooling, in a heat exchanger, a gas mixture containing at least hydrogen, carbon monoxide and methane;ii) sending the cooled mixture to a scrubbing column;iii) introducing a methane-rich liquid at a first intermediate level of the scrubbing column as a first scrubbing liquid;iv) introducing at least one nitrogen-rich liquid at a level higher than the first level of the scrubbing column as a second scrubbing liquid;v) withdrawing a mixture of hydrogen and nitrogen as an overhead gas from the scrubbing column;vi) withdrawing a first bottoms liquid from the scrubbing column and then sending said first bottoms liquid to a stripping column;vii) withdrawing a liquid that is level with an intermediate section of the scrubbing column and sending said liquid either to the heat exchanger, or to a stripping column overhead gas line, or to a second stripping column;viii) withdrawing a second bottoms liquid from the stripping column and then sending to a column configured to separate carbon monoxide and methane; andix) withdrawing a fluid rich in carbon monoxide from the separating column;x) withdrawing a third bottoms liquid from the separating column, wherein at least one portion of the third bottoms liquid from the separating column constitutes the methane-rich ...

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Номер записи: 46
09-05-2019 дата публикации

Method and System for Using a Target Gas Provided by a Gas Decomposition Device

Номер: US20190137173A1
Автор: Brüggemeier Benedikt
Принадлежит:

The present invention relates to a method for utilising a target gas flow consisting of pressurised target gas, which is provided by a continuously-operated gas decomposition device, wherein the target gas flow is supplied to a target load which discontinuously decreases the target gas flow, so that occasionally an excess target gas flow that is not decreased by the target load accrues, as well as a system for supplying a target load. The excess target gases occurring in a gas decomposition device and optionally additionally resulting waste gases may be used in a resource-saving manner through the method and the system according to the invention. This is achieved by the excess target gas flow being supplied as a propellant gas to a compressor which compresses another gas and supplies it as a compressed gas in a compressed gas line, via which it is fed to another load. 1. A method for utilising a target gas flow consisting of compressed target gas provided from a continuously operated gas decomposition device , comprising:using the target gas flow to supply a target load;using the target load to discontinuously decrease the target gas flow;accruing an excess target gas flow that is not decreased by the target load;supplying the excess target gas flow a propellant gas to a compressor;compressing another gas; andsupplying the compressed gas in a compressed gas line which it is fed to another load.2. The method according to claim 1 , wherein the compressor is a gas jet compressor claim 1 , comprising a drive side that is supplied with the excess target gas flow.3. The method according to claim 1 , wherein the target gas is oxygen claim 1 , which is obtained by the gas decomposition device separating ambient air.4. The method according to claim 1 , wherein the excess target gas flow is mixed with the other gas before claim 1 , during claim 1 , or after its compression.5. The method according to claim 1 , wherein a waste gas flow results from the generation of the target ...

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Номер записи: 47
10-06-2021 дата публикации

PREPARING HYDROCARBON STREAMS FOR STORAGE

Номер: US20210172676A1
Автор: Kennedy David Allen, Salamon Mark Mulherin, Yount Christopher Scott
Принадлежит:

A system and process that are configured to prepare incoming hydrocarbon feedstocks for storage. For incoming ethane gas, the embodiments can utilize a plurality of vessels to distill the incoming feedstock to vapor and liquid ethane that is suitable for storage. The embodiments can direct the vapor to a demethanizer column that is downstream of the vessels and other components. The process can include stages for distilling an incoming feedstock at a plurality of vessels to form a vapor and a liquid for storage; directing the vapor to a demethanizer column; and circulating liquid from the demethanizer column back to the plurality of vessels. 1. A gas processing system , comprising: a distillation unit comprising a plurality of vessels, the plurality of vessels configured to form an incoming feedstock into a vapor and a liquid that meets specification for liquid ethane; and', 'a demethanizer column coupled with the plurality of vessels, the demethanizer column configured to form liquid from the vapor,, 'a fluid circuit configured to process an incoming feedstock comprising predominantly ethane liquid into a liquid that meets specification for liquid ethane, the fluid circuit comprisingwherein the fluid circuit is configured to direct the liquid from the demethanizer column to one of the plurality of vessels.2. The gas processing system of claim 11 , wherein the fluid circuit comprises:a mixing unit configured to form a mixture of the vapor with boil-off gas from a storage facility, wherein the fluid circuit is configured to direct the mixture to the demethanizer column.3. The gas processing system of claim 11 , wherein the plurality of vessels comprises:a first vessel configured to receive the incoming feedstock;a second vessel coupled with the first vessel and with the demethanizer column; anda third vessel coupled with the first vessel and the second vessel.4. The gas processing system of claim 1 , wherein the plurality of vessels comprises:a flash drum coupled ...

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Номер записи: 48
07-05-2020 дата публикации

Carbon Dioxide Recycle Stream Processing in an Enhanced Oil Recovery Process

Номер: US20200141638A1
Автор: Prim Eric
Принадлежит:

A method for recovering natural gas liquids from a recycle stream having natural gas liquids includes receiving a carbon dioxide recycle stream that comprises carbon dioxide, natural gas, and the natural gas liquids. The carbon dioxide recycle stream is separated into a purified carbon dioxide recycle stream and a natural gas liquids stream. The purified carbon dioxide recycle stream comprises the carbon dioxide and the natural gas, and the natural gas liquids stream comprises the natural gas liquids. In another embodiment, a system comprises piping and a separator. The piping is configured to receive a recycle stream, and the separator is coupled to the piping and is configured to separate the recycle stream into a purified recycle stream and a natural gas liquids stream. 1. A set of process equipment for use in an enhanced oil recovery (EOR) process , the set of process equipment comprising:{'sub': 1', '8, 'a heat exchanger configured to receive a carbon dioxide recycle stream and cool the carbon dioxide recycle stream to produce a cooled carbon dioxide recycle stream, wherein the cooled carbon dioxide recycle stream comprises carbon dioxide, C-Chydrocarbons, and is substantially free of water;'}a multi-stage column configured to receive the cooled carbon dioxide recycle stream and produce a top effluent stream and a bottom effluent stream;{'sub': 1', '4, 'a single stage separator configured to receive the top effluent stream and produce a vapor stream and a liquid stream, wherein the vapor stream is transferred to the heat exchanger to produce a heated vapor stream, wherein the heated vapor stream comprises carbon dioxide and C-Chydrocarbons; and'}{'sub': 3', '8, 'an expander configured to receive the bottom effluent stream and produce an expanded bottom effluent stream, wherein the expanded bottom effluent stream comprises C-Chydrocarbons.'}2. The set of process equipment of claim 1 , further comprising a molecular sieve dehydrator configured to receive a feed ...

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Номер записи: 49
17-06-2021 дата публикации

CONTROLLED LIQUEFACTION AND ENERGY MANAGEMENT

Номер: US20210180860A1
Автор: Nataraj Shankar, Ramamurthy Shankar
Принадлежит:

Disclosed techniques include controlled liquefaction and energy management. A gas within a first pressure containment vessel is pressurized using a column of liquid. The gas that is being pressurized is cooled using a liquid spray, wherein the liquid spray is introduced into the first pressure containment vessel in a region occupied by the gas. The liquid spray keeps the pressurizing to be isothermal. The gas that was pressurized is metered into a second pressure containment vessel, wherein the metering enables liquefaction of the gas. The gas that was pressurized is stored in a gas capacitor prior to the metering. The gas that was liquefied in the second pressure containment vessel is pushed into a holding tank, wherein the holding tank stores a liquefied state of the gas, and wherein the pushing is accomplished by the pressure of the gas that was metered into the second pressure containment vessel. 1. A computer-implemented method for liquefaction control comprising:pressurizing a gas within a first pressure containment vessel using a column of liquid;cooling the gas that is being pressurized using a liquid spray, wherein the liquid spray is introduced into the first pressure containment vessel in a region occupied by the gas;metering the gas that was pressurized into a second pressure containment vessel, wherein the metering enables liquefaction of the gas; andpushing the gas that was liquefied in the second pressure containment vessel into a holding tank, wherein the holding tank stores a liquefied state of the gas, and wherein the pushing is accomplished by the pressure of the gas that was metered into the second pressure containment vessel.2. The method of wherein the liquid spray keeps the pressurizing to be isothermal.3. The method of wherein the liquid spray is the same substance as the column of liquid.4. The method of wherein the liquid spray is a dissimilar substance from the gas which is being pressurized.5. The method of further comprising dehydrating ...

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Номер записи: 50
01-06-2017 дата публикации

Methods and apparatus for liquefaction of natural gas

Номер: US20170153057A1
Автор: Ned Baudat
Принадлежит: BDL FUELS LLC

A liquefaction unit that may include a first treating unit, a second treating unit, a liquefaction heat exchanger, a changeover unit, a liquid nitrogen tank, an LNG product storage tank, and a pressure build unit. During a first operating phase, the associated piping defines a first operating phase flow path for natural gas from the natural gas inlet stream to the first treating unit to the liquefaction unit to the LNG product stream, and a first operating phase flow path for nitrogen from the liquid nitrogen stream to the liquefaction unit to the second treating unit. During a second operating phase, the associated piping defines a second operating phase flow path for natural gas from the natural gas inlet stream to the second treating unit to the liquefaction unit to the LNG product stream, and a first operating phase flow path for nitrogen from the liquid nitrogen stream to the liquefaction unit to the first treating unit. During a changeover operating phase, the associated piping defines a changeover flow path for the natural gas from the natural gas inlet stream to the changeover treating unit to the liquefaction unit to the LNG product stream.

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Номер записи: 51
22-09-2022 дата публикации

Production of Acetic Acid through Cryogenic Separation of Syngas

Номер: US20220298095A1
Автор: Ali Shakir Al Hunaidy, Hasan Imran, Hyungmuk Lim, Jay H. Lee, Kosan Roh
Принадлежит: Korea Advanced Institute of Science and Technology KAIST, Saudi Arabian Oil Co

A system and method for producing acetic acid, including dry reforming methane with carbon dioxide to give syngas, cryogenically separating carbon monoxide from the syngas giving a first stream including primarily carbon monoxide and a second stream including carbon monoxide and hydrogen. The method includes synthesizing methanol from the second stream via hydrogenation of carbon monoxide in the second stream, synthesizing dimethyl ether from the methanol, and generating acetic acid from the dimethyl ether and first-stream carbon monoxide.

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Номер записи: 52
24-06-2021 дата публикации

Process for Separating Hydrogen from an Olefin Hydrocarbon Effluent Vapor Stream

Номер: US20210190420A1
Автор: Zhao James, Zhao Shukui
Принадлежит: EnFlex, Inc.

One or more specific embodiments disclosed herein includes a method for separating hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream, employing a integrated heat exchanger, multiple gas-liquid separators, external refrigeration systems, and a rectifier attached to a liquid product drum. 1. A process for the separation of hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream from a dehydrogenation unit , which process comprises:a. introducing a compressed effluent vapor stream into a processing unit;b. cooling the compressed effluent vapor stream in a heat exchanger;c. separating hydrogen from olefin and heavy paraffinic components in the cooled compressed effluent vapor stream in a first separator to provide a first vapor stream and a first liquid stream;d. cooling a first vapor stream in the heat exchanger;e. separating hydrogen from olefin and heavy paraffinic components in the cooled first vapor stream in a second separator to provide a second vapor stream and a second liquid stream;f. dividing the second vapor stream into a first split stream and a second split stream;g. warming the first split stream in the heat exchanger to produce a gas product;h. withdrawing the gas product from the processing unit;i. lowering the pressure of the second split stream in a control valve, wherein the temperature of the second spilt stream is reduced;j. cooling a liquid paraffinic stream in the heat exchanger;k. combining the cooled liquid paraffinic stream with the cooled second split stream to provide a combined feed;l. vaporizing the combined feed in the heat exchanger;m. withdrawing the vaporized combined feed;n. lowering the pressure of the first liquid stream in a control valve;o. partially vaporizing the first liquid stream in the heat exchanger;p. flashing the partially vaporized first liquid stream in a liquid product drum to provide a hydrogen-rich gas, which travels to a rectifier connected to the liquid product drum;q. ...

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Номер записи: 53
13-06-2019 дата публикации

CARBON DIOXIDE RECOVERY METHOD AND RECOVERY APPARATUS

Номер: US20190178574A1
Автор: NAITO Toshiyuki
Принадлежит: IHI CORPORATION

The carbon dioxide recovery apparatus has a dryer having a hygroscopic agent for drying a gas, and a separator for separating carbon dioxide from the gas dried by the dryer and discharging a residual gas from which carbon dioxide has been separated. The recovery apparatus further includes an introduction part for introducing a regeneration gas from outside for regenerating the hygroscopic agent, a regeneration system capable of supplying one of the regeneration gas introduced from the introduction part and the residual gas discharged from the separator to the dryer, and a switching mechanism for switching supply by the regeneration system between the regeneration gas and the residual gas in response to regeneration of the hygroscopic agent. 1. A carbon dioxide recovery apparatus , comprising:a dryer having a hygroscopic agent for drying a gas;a separator which separates carbon dioxide from the gas dried by the dryer and discharges a residual gas from which carbon dioxide has been separated;an introduction part which introduces from outside a regeneration gas for regenerating the hygroscopic agent;a regeneration system capable of supplying one of the regeneration gas introduced from the introduction part and the residual gas discharged from the separator, to the dryer; anda switching mechanism which switches supply by the regeneration system between the regeneration gas and the residual gas in response to regeneration of the hygroscopic agent.2. The carbon dioxide recovery apparatus according to claim 1 , further comprising:a recirculating system capable of supplying the residual gas discharged from the separator to the gas to be supplied to the separator,wherein the switching mechanism switches supply by the recirculating system so that the residual gas is supplied to the gas to be supplied to the separator while the regeneration gas is supplied to the dryer by the regeneration system.3. The carbon dioxide recovery apparatus according to claim 1 , wherein the ...

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Номер записи: 54
15-07-2021 дата публикации

Process for extracting gasoline from a gas containing condensable hydrocarbons

Номер: US20210214619A1
Автор: LANFREY Pierre-Yves
Принадлежит: AXENS

The present invention relates to the extraction of gasoline from a gas G, with 1. Process for extracting gasoline from a gas G containing condensable hydrocarbons , in particular a natural gas containing C5+ compounds , said process comprising the following steps:(a) a step of extracting gasoline by refrigeration of the gas to be treated comprising methanol GM obtained from step (d), producing a partially condensed fluid GL1; a first aqueous liquid phase A1 comprising methanol,', 'a first liquid phase H1 of hydrocarbon(s) comprising methanol, and', 'a gaseous phase G1 obtained from the gas G;, '(b) a step of separating said partially condensed fluid GL1, carried out in a three-phase separator, producing'} a second aqueous liquid phase A2 comprising methanol and depleted in methanol compared to said first aqueous liquid phase Al,', "a gaseous phase of gas to be treated comprising methanol GM';"], '(c) a first step of contacting a portion of the gas G to be treated with said first aqueous liquid phase Al comprising methanol, producing'}(d) a step of mixing said gaseous phase of gas to be treated comprising methanol GM' with the remainder of the gas G to be treated, with possible adjustment of the methanol content of the mixture, producing a gas to be treated comprising methanol GM which is intended to be sent to step a);(e) a step of stabilizing all or part of said first liquid phase H1 of hydrocarbon(s) comprising methanol, producing a stabilized condensate GL2 and a C1-C4-rich gaseous phase G2 comprising methanol.2. Process according to claim 1 , characterized in that the step (a) of extracting gasoline by refrigeration of the gas to be treated is carried out in a refrigeration section operating at a temperature of between −60° C. and 0° C. and at a pressure of between 1.2 MPa and 6.0 MPa.3. Process according to claim 1 , characterized in that the stabilization step (e) is carried out in a stabilization/distillation column claim 1 , producing at the bottom the ...

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Номер записи: 55
06-07-2017 дата публикации

Hydrocarbon Gas Processing

Номер: US20170191751A1
Автор: Cuellar Kyle T., Hudson Hank M., Johnke Andrew F., Lewis W. Larry, Lynch Joe T., Miller Scott A., Wilkinson John D.
Принадлежит:

A process and an apparatus are disclosed for a compact processing assembly to improve the recovery of C(or C) and heavier hydrocarbon components from a hydrocarbon gas stream. The preferred method of separating a hydrocarbon gas stream generally includes producing at least a substantially condensed first stream and a cooled second stream, expanding both streams to lower pressure, and supplying the streams to a fractionation tower. In the process and apparatus disclosed, the expanded first stream is heated to form a vapor fraction and a liquid fraction. The vapor fraction is combined with the tower overhead vapor, directed to a heat and mass transfer means inside a processing assembly, and cooled and partially condensed by the expanded first stream to form a residual vapor stream and a condensed stream. The condensed stream is combined with the liquid fraction and supplied to the tower at its top feed point. 15.-. (canceled)6. In an apparatus for the separation of a gas stream containing methane , Ccomponents , Ccomponents , and heavier hydrocarbon components into a volatile residue gas fraction and a relatively less volatile fraction containing a major portion of said Ccomponents , Ccomponents , and heavier hydrocarbon components or said Ccomponents and heavier hydrocarbon components , in said apparatus there being(a) one or more heat exchange means and at least one dividing means to produce at least a first stream that has been cooled under pressure to condense substantially all of it, and at least a second stream that has been cooled under pressure;(b) a first expansion means connected to receive said substantially condensed first stream under pressure and expand it to a lower pressure, whereby said first stream is further cooled;(c) a distillation column connected to said first expansion means to receive said expanded further cooled first stream at a top feed position, with said distillation column producing at least an overhead vapor stream and a bottom liquid ...

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Номер записи: 56
20-06-2019 дата публикации

PROCESS INTEGRATION FOR NATURAL GAS LIQUID RECOVERY

Номер: US20190186822A1
Автор: AlNajjar Abdulaziz A., Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

This specification relates to operating industrial facilities, for example, crude oil refining facilities or other industrial facilities that include operating plants that process natural gas or recover natural gas liquids. 1. A natural gas liquid recovery system comprising:a cold box comprising a plate-fin heat exchanger comprising a plurality of compartments, the cold box configured to transfer heat from a plurality of hot fluids in the natural gas liquid recovery system to a plurality of cold fluids in the natural gas liquid recovery system; and a primary refrigerant comprising a first mixture of hydrocarbons;', 'a low pressure (LP) refrigerant separator in fluid communication with the cold box, the LP refrigerant separator configured to receive a second portion of the primary refrigerant and configured to separate phases of the second portion of the primary refrigerant into a LP primary refrigerant liquid phase and a LP primary refrigerant vapor phase, the LP refrigerant separator configured to provide at least a portion of the LP primary refrigerant liquid phase to the cold box; and', 'a high pressure (HP) refrigerant separator in fluid communication with the cold box, the HP refrigerant separator configured to receive a first portion of the primary refrigerant and configured to separate phases of the first portion of the primary refrigerant into a HP primary refrigerant liquid phase and a HP primary refrigerant vapor phase, the HP refrigerant separator configured to provide at least a portion of the HP primary refrigerant liquid phase to the cold box., 'a refrigeration system configured to receive heat through the cold box, the refrigeration system comprising2. The natural gas liquid recovery system of claim 1 , wherein the plurality of hot fluids comprises a feed gas to the natural gas liquid recovery system claim 1 , the feed gas comprising a second mixture of hydrocarbons.3. The natural gas liquid recovery system of claim 2 , wherein the primary refrigerant ...

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Номер записи: 57
20-06-2019 дата публикации

Process integration for natural gas liquid recovery

Номер: US20190186825A1
Автор: Abdulaziz A. ALNAJJAR, Akram Hamed Mohamed KAMEL, Mahmoud Bahy Mahmoud NOURELDIN
Принадлежит: Saudi Arabian Oil Co

This specification relates to operating industrial facilities, for example, crude oil refining facilities or other industrial facilities that include operating plants that process natural gas or recover natural gas liquids.

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Номер записи: 58
22-07-2021 дата публикации

PROCESS INTEGRATION FOR NATURAL GAS LIQUID RECOVERY

Номер: US20210222947A1
Автор: AlNajjar Abdulaziz A., Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

This specification relates to operating industrial facilities, for example, crude oil refining facilities or other industrial facilities that include operating plants that process natural gas or recover natural gas liquids. 1. A method for recovering natural gas liquid from a feed gas , the method comprising:transferring heat from a plurality of hot fluids to a plurality of cold fluids through a cold box, the cold box comprising a plate-fin heat exchanger comprising a plurality of compartments; and a primary refrigerant comprising a first mixture of hydrocarbons;', 'a low pressure (LP) refrigerant separator in fluid communication with the cold box;', 'a high pressure (HP) refrigerant separator in fluid communication with the cold box; and', 'a subcooler in fluid communication with the cold box;, 'transferring heat to a refrigeration system through the cold box, the refrigeration system comprisingflowing a first portion of the primary refrigerant to the LP refrigerant separator;separating the first portion of the primary refrigerant into a LP primary refrigerant liquid phase and a LP primary refrigerant vapor phase using the LP refrigerant separator;transferring heat from the first portion of the primary refrigerant to the LP primary refrigerant vapor phase using the subcooler;flowing the first portion of the primary refrigerant from the subcooler to the cold box;flowing at least a portion of the LP primary refrigerant liquid phase to the cold box;flowing a second portion of the primary refrigerant to the HP refrigerant separator;separating the second portion of the primary refrigerant into a HP primary refrigerant liquid phase and a HP primary refrigerant vapor phase using the HP refrigerant separator;flowing at least a portion of the HP primary refrigerant liquid phase to the cold box;flowing, to a de-methanizer column in fluid communication with the cold box, at least one hydrocarbon stream originating from the feed gas;separating, using the de-methanizer column, ...

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Номер записи: 59
30-07-2015 дата публикации

Method and system for treating a flow back fluid exiting a well site

Номер: US20150210936A1
Автор: David R. Thompson, Kenneth L. Burgers, Minish M. SHAH, Raymond F. Drnevich
Принадлежит: Praxair Technology Inc

The present invention relates to a method and system for treating a flow back fluid exiting a well site following stimulation of a subterranean formation. More specifically, the invention relates to processing the flow back fluid, and separating into a carbon dioxide rich stream and a carbon dioxide depleted stream, and continuing the separation until the carbon dioxide concentration in the flow back stream until the carbon dioxide concentration in the flow back gas diminishes to a point selected in a range of about 50-80 mol % in carbon dioxide concentration, after which the lower concentration carbon dioxide flow back stream continues to be separated into a carbon dioxide rich stream which is routed to waste or flare, and a hydrocarbon rich stream is formed.

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Номер записи: 60
19-07-2018 дата публикации

PROCESS FOR EXPANSION AND STORAGE OF A FLOW OF LIQUEFIED NATURAL GAS FROM A NATURAL GAS LIQUEFACTION PLANT, AND ASSOCIATED PLANT

Номер: US20180202610A1
Автор: TIRILLY Vincent, VOVARD Sylvain
Принадлежит: TECHNIP FRANCE

The process comprises the following steps: mixing a gaseous stream of flash gas and a gaseous stream of boil-off gas to form a mixed gaseous flow; compressing the mixed gaseous flow in at least one compression apparatus to form a flow of compressed combustible gas; withdrawing a bypass flow in the flow of compressed combustible gas; compressing the bypass flow in at least one downstream compressor; cooling and expanding the compressed bypass flow; reheating at least a first stream derived from the expanded bypass flow in at least one downstream heat exchanger, reintroducing the first reheated stream in the mixed gaseous flow upstream from the compression apparatus. 1. A process for expansion and storage of a flow of liquefied natural gas from a natural gas liquefaction plant , comprising:flash expanding the flow of liquefied natural gas in an expander to form a flow of expanded liquefied natural gas;bringing the flow of expanded liquefied natural gas into a flash end capacitor;recovering, at the bottom of the flash end capacitor, a liquid stream of liquefied natural gas;conveying the liquid stream of liquefied natural gas into at least one liquefied natural gas tank;withdrawing, at the head of the flash end capacitor, a gaseous stream of flash gas;recovering, at the head of the liquefied natural gas tank, a gaseous stream of boil-off gas;mixing the gaseous stream of flash gas and the gaseous stream of boil-off gas to form a mixed gaseous flow;compressing the mixed gaseous flow in at least one compressor to form a flow of compressed combustible gas;withdrawing a bypass flow in the flow of compressed combustible gas;compressing the bypass flow in at least one downstream compressor to form a compressed bypass flow;cooling the compressed bypass flow;expanding the compressed bypass flow to form an expanded bypass stream;reheating at least a first stream derived from the expanded bypass flow in at least one downstream heat exchanger,reintroducing the first reheated stream ...

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Номер записи: 61
26-07-2018 дата публикации

Method for purifying a gas rich in hydrocarbons

Номер: US20180208855A1
Автор: Henri Paradowski, Nicolas CHAMBRON, Pierre COSTA DE BEAUREGARD
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

A process for the purification of a gas rich in hydrocarbons and comprising at least 10 ppm by volume of hydrocarbons having at least six carbon atoms nitrogen.

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Номер записи: 62
25-06-2020 дата публикации

MULTI-PRODUCT LIQUEFACTION METHOD AND SYSTEM

Номер: US20200200471A1
Автор: Brostow Adam Adrian, Brussol Laurent Marc, Holzer David Joseph, Roberts Mark Julian, Shnitser Russell, VOVARD Sylvain
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A liquefaction system is capable of sequentially or simultaneously liquefying multiple feed streams of hydrocarbons having different normal bubble points with minimal flash. The liquefying heat exchanger has separate circuits for handling multiple feed streams. The feed stream with the lowest normal boiling point is sub-cooled sufficiently to suppress most of the flash. Feed streams with relatively high normal boiling points are cooled to substantially the same temperature, then blended with bypass streams to maintain each product near its normal bubble point. The system can also liquefy one stream at a time by using a dedicated circuit or by allocating the same feed to multiple circuits. 115.-. (canceled)16. An apparatus comprising:a coil-wound heat exchanger having a warm end, a cold end, a tube side having a plurality of cooling conduits;a first feed stream conduit in upstream fluid flow communication with at least one of the plurality of cooling conduits and in downstream fluid flow communication with a supply of a first hydrocarbon fluid having a first normal bubble point;a second feed stream conduit n upstream fluid flow communication with at least one of the plurality of cooling conduits and in downstream fluid flow communication and a second hydrocarbon fluid having a second normal bubble point that is lower than the first normal bubble point;a first cooled feed stream conduit in downstream fluid flow communication with the first feed stream conduit and at least one of the plurality of cooling conduits;a second cooled feed stream conduit in downstream fluid flow communication with the second feed stream conduit and at least one of the plurality of cooling conduits;a first product stream conduit in downstream fluid flow communication with the first cooled feed stream;a second product stream conduit in downstream fluid flow communication with the second cooled feed stream;a first bypass conduit having at least one valve, an upstream end in fluid flow ...

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Номер записи: 63
02-08-2018 дата публикации

IN-LINE L-GRADE RECOVERY SYSTEMS AND METHODS

Номер: US20180216880A1
Автор: BABCOCK John A., III Charles P., SIESS
Принадлежит:

An in-line L-Grade recovery system having a first in-line separator in communication with a natural gas stream and configured to separate the natural gas stream into a gas stream and a liquid stream, a second in-line separator in communication with the first in-line separator and configured to separate the liquid stream into L-Grade and water, and a storage tank in communication with the second in-line separator and configured to store the L-Grade. 1. An in-line L-Grade recovery system , comprising:a first in-line separator in communication with a natural gas stream and configured to separate the natural gas stream into a gas stream and a liquid stream;a second in-line separator in communication with the first in-line separator and configured to separate the liquid stream into L-Grade and water; anda storage tank in communication with the second in-line separator and configured to store the L-Grade.2. The system of claim 1 , further comprising a third in-line separator in communication with the first in-line separator and configured to separate out Y-Grade NGL from the gas stream.3. The system of claim 2 , further comprising a glycol dehydration and regeneration system in communication with the third in-line separator.4. The system of claim 3 , wherein glycol used in the glycol dehydration and regeneration system includes one or a combination of ethylene claim 3 , diethylene claim 3 , triethylene claim 3 , and tetraethylene.5. The system of claim 4 , wherein the glycol dehydration and regeneration system is configured to remove water vapor from the gas stream.6. The system of claim 5 , further comprising a Joule-Thomson valve in fluid communication with the glycol dehydration and regeneration system.7. The system of claim 6 , wherein the Joule-Thomson valve is configured to cool the gas stream to a temperature between −20 degrees Fahrenheit and 0 degrees Fahrenheit.8. The system of claim 7 , further comprising a high pressure distillation column configured to ...

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Номер записи: 64
16-08-2018 дата публикации

Increasing Efficiency in an LNG Production System by Pre-Cooling a Natural Gas Feed Stream

Номер: US20180231305A1
Автор: Fritz Pierre, Jr.
Принадлежит: Individual

Described herein are systems and processes to produce liquefied natural gas (LNG) using liquefied nitrogen (LIN) as the refrigerant. Greenhouse gas contaminants are removed from the LIN using a greenhouse gas removal unit. The LNG is compressed prior to being cooled by the LIN.

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Номер записи: 65
16-08-2018 дата публикации

System and Method for Separating Natural Gas Liquid and Nitrogen from Natural Gas Streams

Номер: US20180231306A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for removing nitrogen and producing a high pressure methane product stream and an NGL product stream from natural gas feed streams where at least 90%, and preferably at least 95%, of the ethane in the feed stream is recovered in the NGL product stream. The system and method of the invention are particularly suitable for use with feed streams in excess of 5 MMSCFD and up to 300 MMSCFD and containing around 5% to 80% nitrogen. The system and method preferably combine use of strategic heat exchange between various process streams with a high pressure rectifier tower and the ability to divert all or a portion of a nitrogen rejection unit feed stream to optionally bypass a nitrogen fractionation column to reduce capital costs and operating expenses. 1. A system for removing nitrogen from a feed stream comprising nitrogen , methane , ethane , and other components to produce a methane product stream and an NGL product stream , the system comprising:a first separator wherein the feed stream is separated into a first overhead stream and a first bottoms stream;a first fractionating column wherein the first overhead stream is separated into a second overhead stream and a second bottoms stream;an expander for expanding the first overhead stream prior to the first fractionating column;a second fractionating column wherein the second bottoms stream is separated into a third overhead stream and a third bottoms stream;a third fractionating column wherein at least a first NRU feed stream is separated into a fourth overhead stream and a fourth bottoms stream;a first heat exchanger for cooling a first portion of the feed stream prior to the first separator and cooling a first portion of the second overhead stream prior to the third fractionating column through heat exchange with the fourth bottoms stream and a recycle refrigerant stream;a second heat exchanger for cooling the first portion of the second overhead stream after the first heat exchanger and prior to ...

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Номер записи: 66
01-09-2016 дата публикации

System and Method for the Production of Liquefied Natural Gas

Номер: US20160252298A1
Автор: Kerth Jason M., Ohart Dan, Yonker Gregory
Принадлежит:

A method for producing liquefied natural gas (LNG) and separating natural gas liquids (NGLs) from the LNG is provided. The method may include compressing natural gas to compressed natural gas, removing a non-hydrocarbon from the compressed natural gas, and cooling the compressed natural gas to a cooled, compressed natural gas. The method may also include expanding a first portion and a second portion of the cooled, compressed natural gas in a first expansion element and a second expansion element to generate a first refrigeration stream and a second refrigeration stream, respectively. The method may further include separating a third portion of the cooled, compressed natural gas into a methane lean natural gas fraction containing the NGLs and a methane rich natural gas fraction. The methane rich natural gas fraction may be cooled in a liquefaction assembly with the first and second refrigeration streams to thereby produce the LNG. 1. A method for producing liquefied natural gas from a natural gas source and separating natural gas liquids from the liquefied natural gas produced , comprising:compressing natural gas from the natural gas source in a compression assembly fluidly coupled with the natural gas source to produce a compressed natural gas;removing a non-hydrocarbon from the compressed natural gas in a separator fluidly coupled with the compression assembly;cooling the compressed natural gas to a cooled, compressed natural gas with a cooling assembly in thermal communication with the compression assembly;expanding a first portion of the cooled, compressed natural gas in a first expansion element to generate a first refrigeration stream;expanding a second portion of the cooled, compressed natural gas in a second expansion element to generate a second refrigeration stream;feeding a third portion of the cooled, compressed natural gas to a distillation column of a distillation assembly;separating the third portion of the cooled, compressed natural gas into a ...

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Номер записи: 67
08-08-2019 дата публикации

Systems and Methods for LNG Production with Propane and Ethane Recovery

Номер: US20190242645A1
Автор: Graham Curt, Mak John, THOMAS Jacob
Принадлежит: FLUOR TECHNOLOGIES CORPORATION

A LNG liquefaction plant includes a propane recovery unit including an inlet for a feed gas, a first outlet for a LPG, and a second outlet for an ethane-rich feed gas, an ethane recovery unit including an inlet coupled to the second outlet for the ethane-rich feed gas, a first outlet for an ethane liquid, and a second outlet for a methane-rich feed gas, and a LNG liquefaction unit including an inlet coupled to the second outlet for the methane-rich feed gas, a refrigerant to cool the methane-rich feed gas, and an outlet for a LNG. The LNG plant may also include a stripper, an absorber, and a separator configured to separate the feed gas into a stripper liquid and an absorber vapor. The stripper liquid can be converted to an overhead stream used as a reflux stream to the absorber. 1. A method for LNG liquefaction comprising:converting a feed stream comprising methane, ethane, and propane to a LPG and an ethane-rich feed gas;compressing the ethane-rich feed gas to form a compressed stream, wherein the compressed stream is configured to split into a first portion and a second portion, wherein the first portion of the compressed stream, the second portion of the compressed stream, and the ethane-rich feed gas are each ethane-rich, wherein the compressed stream and the second portion of compressed stream have the same composition;producing, by a demethanizer, an ethane liquid in an ethane bottom liquid stream and a residue gas in a methane overhead vapor stream, wherein a first portion of the residue gas is configured to flow to the demethanizer as a first reflux stream, wherein a second portion of the residue gas from the demethanizer is a methane-rich feed gas, wherein the first portion of the compressed stream is configured to flow to the demethanizer as a second reflux stream, wherein the second portion of the compressed stream is configured to flow to the demethanizer; andconverting the methane-rich feed gas to a LNG.2. The method of claim 1 , further comprising: ...

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Номер записи: 68
06-09-2018 дата публикации

METHOD AND APPARATUS FOR PRODUCING A MIXTURE OF CARBON MONOXIDE AND HYDROGEN

Номер: US20180251373A1
Автор: FERNANDEZ Angela, Hernandez Antoine, Tsevery Jean-Marc
Принадлежит: L'Air Liquide, Societe Anonyme pour I'Etude et I'Etude et I'Exploitation des Procedes Georges Cla

In a method for producing a gaseous mixture of CO and H, a first gas comprising at least 50% CO is compressed in a first compressor to form a first compressed gas cooled to a first temperature and mixes with a second gas comprising at least 50% hydrogen in order to form the gaseous mixture, at least one of the first and second gases originating from a cryogenic distillation separation unit in which a feed gas containing Hand CO cools in a first heat exchanger and is separated in at least one distillation column and at least one part of the second gas heats in the separation unit to a third temperature lower than the first temperature and is then sent to mix with the first gas. 112-. (canceled)13. A process for the production of a gas mixture of carbon monoxide and hydrogen in which:i) compressing a first gas comprising at least 50% of carbon monoxide in a first compressor in order to form a first compressed gas cooled to a first temperature;ii) mixing a second gas comprising at least 50% of hydrogen with the first compressed gas in order to form the gas mixture;iii) at least one of the first and second gases originates from a unit for separation by cryogenic distillation in which a feed gas containing hydrogen and carbon monoxide is cooled in a first heat exchanger and is separated in at least one distillation column;wherein the process further includes a step selected from the group consisting of:a) a part of the first compressed gas is sent to the separation unit, where the part of the first compressed gas is cooled down to a second temperature which is less than the first temperature and is subsequently mixed with the gas mixture or the second gas;b) at least a part of the second gas is reheated in the separation unit up to a third temperature which is less than the first temperature and is subsequently sent to be mixed with the first gas, andc) combinations thereof.14. The process as claimed in claim 13 , in which the first and second gases originate from the ...

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Номер записи: 69
07-10-2021 дата публикации

METHOD FOR STARTING UP AN ARGON SEPARATION COLUMN OF AN APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION AND UNIT FOR IMPLEMENTING THE METHOD

Номер: US20210310730A1
Автор: BEDNARSKI David, Saulnier Bernard, TRUEBA Antonio
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l?Exploitation des Procedes Georges Claude

A unit for producing argon by cryogenic distillation, suitable for connection to a double air separation column consisting of first and second columns interconnected thermally, comprises an argon separation column surmounted with a top condenser and a denitrogenation column, means for withdrawing an argon-rich and nitrogen-depleted product (LAR) at the bottom of the denitrogenation column, means for connecting the top of the argon separation column to the denitrogenation column, means for sending a top gas from the argon separation column to the atmosphere, means for withdrawing a nitrogen-rich fluid from the top of the denitrogenation column, an analyser for measuring the nitrogen content at the top of the argon separation column, and means for opening and closing the means for connecting the top of the argon separation column to the denitrogenation column depending on the nitrogen content detected by the analyser.

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Номер записи: 70
07-10-2021 дата публикации

METHOD FOR RECYCLING ARGON

Номер: US20210310733A1
Автор: Herzog Friedhelm, Schlotmann Alexander
Принадлежит: MESSER GROUP GMBH

A method for recycling argon from an industrial process; in which the gaseous argon is compressed after the use thereof in the industrial process, is fed to a main heat exchanger and is cooled there in contact with a first cooling medium. The compressed and cooled argon is fed to a rectification column or another cryogenic separating device and is liquefied there by direct heat exchange with a second cooling medium and is freed of low-boiling substances by rectification. The liquefied argon is drawn from the bottom of the rectification column and, after use as the first cooling medium in the main heat exchanger, is fed back into the industrial process, the raw argon being brought into thermal contact with cryogenically liquefied pure argon in the main heat exchanger and/or the rectification column. The product argon that results is highly pure and can be fed back to the industrial process. 1. A method for reutilizing argon in an industrial process , in which argon kept in stock in the liquid state in a tank (pure argon) is taken from the tank , vaporized and fed in gaseous form to an industrial process , wherein:a. the gaseous argon which has been used in the industrial process (crude argon) is compressed in a compressor;b. the compressed crude argon is fed to a main heat exchanger and cooled there by indirect heat exchange with at least one first cooling medium;c. the compressed and cooled crude argon is fed to a separation device and cooled there by heat exchange with a second cooling medium to a temperature below the boiling point of argon at the pressure prevailing in the separation device, resulting in a gas phase composed of argon contaminated with low boilers and a liquid phase composed of argon which has been at least largely freed of low boilers (product argon) being formed;d. the gas phase is at least partly taken off from a head space of the separation device;e. the product argon is taken off in the liquid state from a bottom region of the separation ...

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Номер записи: 71
15-09-2016 дата публикации

Unit and method for purifying co2 by adsorption

Номер: US20160265840A1
Автор: Patrick Le Bot
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

The invention relates to a gas depleted of carbon dioxide produced by distillation, which is separated such as to produce a gas depleted of hydrogen, the gas depleted of hydrogen being used as a regeneration gas of a system for purification by adsorption upstream from the distillation, the composition of the regeneration gas at the intake of the purification system not being in the range of flammability in air.

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Номер записи: 72
06-08-2020 дата публикации

COMPRESSING SYSTEM, AND GAS COMPRESSING METHOD

Номер: US20200248961A1
Автор: MIYATA Hiroyuki, NAGAO Hideki, YONEMURA Naoto
Принадлежит:

A compressing system includes a compression section that compresses a target gas to an intermediate pressure, which is equal to or higher than a critical pressure and lower than a target pressure to generate an intermediate supercritical fluid, a cooling section that cools the intermediate supercritical fluid generated in the compression section to near a critical temperature to generate an intermediate supercritical pressure liquid, and a pumping section that compresses the intermediate supercritical pressure liquid generated in the cooling section to a pressure that is equal to or higher than the target pressure. At least one of the intermediate supercritical pressure liquid compressed in the pumping section, a low-temperature liquid generated by extracting the intermediate supercritical pressure liquid on the upstream side of the pumping section to reduce pressure to near the critical pressure, and an external cooling medium is used as a cooling medium in the cooling section. 16-. (canceled)7. A gas compressing method that compresses carbon dioxide as a target gas to a pressure that is equal to or higher than a target pressure higher than a critical pressure , the gas compressing method comprising:a compression step of compressing the carbon dioxide to an intermediate pressure, which is equal to or higher than the critical pressure and is lower than the target pressure;a first cooling step of cooling the carbon dioxide compressed in the compression step to generate an intermediate supercritical fluid;a second cooling step of cooling the intermediate supercritical fluid cooled in the first cooling step to a temperature range of ±20° C. from a critical temperature of the carbon dioxide to generate an intermediate supercritical pressure liquid;a pressure-reduction step of reducing the pressure of a portion of the intermediate supercritical pressure liquid extracted a main flow thereof after the second cooling step to generate a low-temperature liquid; anda pumping ...

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Номер записи: 73
13-09-2018 дата публикации

METHOD OF REMOVING CO2 FROM A CONTAMINATED HYDROCARBON STREAM

Номер: US20180259251A1
Автор: POORTE Raimo Edwin Gregor, VAN AKEN Michiel Gijsbert, VAN CAMPEN Laurens Joseph Arnold Marie, VAN SANTEN Helmar
Принадлежит:

The present invention provides a method to separate CO2 from a contaminated hydrocarbon-containing stream. The method comprises obtaining a multiphase contaminated hydrocarbon-containing stream () containing at least a vapour phase, a liquid phase and a solid phase, creating a slurry stream () from the multiphase stream. The slurry stream is fed to a crystallization chamber comprising CO2 seed particles. A liquid hydrocarbon stream () is obtained from the crystallization chamber () and a concentrated slurry () is obtained. The concentrated slurry () is removed from the crystallization chamber () by means of an extruder (), thereby obtaining solid CO2. A feedback stream () is obtained from the solid CO2 comprising CO2 seed particles having an average size greater than 100 micron. The feedback stream () is passed into the crystallization chamber (). 1. A method to separate CO2 from a contaminated hydrocarbon-containing stream; the method comprising(a) providing a multiphase contaminated hydrocarbon-containing stream, from the contaminated hydrocarbon-containing stream, the multiphase contaminated hydrocarbon-containing stream containing at least a liquid phase and a solid phase, wherein the solid phase comprises CO2 particles;(b1) feeding a slurry stream obtained from the multiphase contaminated hydrocarbon-containing stream to a crystallization chamber, the crystallization chamber comprising seed particles, the seed particles comprising CO2;(b2) obtaining a liquid hydrocarbon stream from the crystallization chamber, thereby forming a concentrated slurry in the crystallization chamber;(b3) removing the concentrated slurry from the crystallization chamber by means of an extruder and obtaining a CO2 enriched solid product and a methane enriched liquid hydrocarbon stream from the extruder.2. The method according to claim 1 , wherein the method further comprises(b4) obtaining a CO2 feedback stream from the CO2 enriched solid product obtained in (b3), the feedback stream ...

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Номер записи: 74
21-09-2017 дата публикации

SYSTEM AND METHOD FOR ARGON RECOVERY FROM A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20170268820A1
Автор: Howard Henry E.
Принадлежит:

A system and method for argon and nitrogen extraction from a feed stream comprising hydrogen, methane, nitrogen and argon, such as a low-pressure tail gas of an ammonia production plant is provided. The disclosed system and method provides for a rectification system wherein an argon depleted gaseous stream and a methane rich liquid stream are produced and subsequently combined in whole or in part prior to vaporization. Nitrogen and argon containing streams may also be produced from the rectification system. An argon stripping column arrangement is also disclosed where residual argon is removed from the methane-rich fuel gas and recycled back to the feed stream.

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Номер записи: 75
21-09-2017 дата публикации

SYSTEM AND METHOD FOR ENHANCED ARGON RECOVERY FROM A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20170268821A1
Автор: Howard Henry E.
Принадлежит:

A system and method for argon and nitrogen extraction from a feed stream comprising hydrogen, methane, nitrogen and argon, such as tail gas of an ammonia production plant is provided. The disclosed system and method provides for nitrogen-argon rectification and the methane rejection within a column system comprised of at least one distillation column. Nitrogen and argon are further separated and to produce liquid products. An argon stripping column arrangement is disclosed where residual argon is further removed from the methane-rich fuel gas and recycled back to the feed stream.

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Номер записи: 76
20-09-2018 дата публикации

PLANT AND PROCESS FOR AMMONIA PRODUCTION WITH CRYOGENIC PURIFICATION, AND RELATED METHOD OF REVAMPING

Номер: US20180266758A1
Автор: Filippi Ermanno, Ostuni Raffaele
Принадлежит: Casale SA

Process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen, said process comprising: generation of a synthesis gas () containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section (); a first cryogenic purification, designed to remove nitrogen and raise said molar ratio; conversion of the synthesis gas into ammonia () inside a high-pressure synthesis loop (), with extraction from said loop of a purge stream () containing hydrogen and inert gases; wherein at least a portion of said purge stream () undergoes a further purification in order to recover at least part of the hydrogen contained therein, obtaining at least one stream () containing recovered hydrogen which is recycled to the process. 1. A process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen , said process comprising the steps of:production of a synthesis gas containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section;a first cryogenic purification of said synthesis gas, suitable to remove nitrogen and raise the hydrogen/nitrogen molar ratio of said gas to a predetermined value;compression of the purified synthesis gas to a synthesis pressure;conversion of synthesis gas into ammonia inside a synthesis loop, with extraction from said loop of a purge stream containing hydrogen and inert gases; andperforming a second purification of at least one portion of said purge stream, by means of a process suitable to recover at least part of the hydrogen contained therein, with the production of at least one stream containing recovered hydrogen and of at least one waste stream, recycling said at least one stream containing recovered hydrogen to said process, in order to increase the ammonia production.2. The process according to claim 1 , wherein said synthesis gas from the front-end section contains an excess of nitrogen of at least 25% with respect to the hydrogen/nitrogen molar stoichiometric ...

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Номер записи: 77
04-11-2021 дата публикации

Process for Separating Hydrogen from an Olefin Hydrocarbon Effluent Vapor Stream

Номер: US20210341224A1
Автор: Zhao James, Zhao Shukui
Принадлежит: EnFlex, Inc.

One or more specific embodiments disclosed herein includes a method for separating hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream, employing a integrated heat exchanger, multiple gas-liquid separators, external refrigeration systems, and a rectifier attached to a liquid product drum. 1. A process for the separation of hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream from a dehydrogenation unit , which process comprises:a. introducing a compressed effluent vapor stream into a processing unit;b. cooling the compressed effluent vapor stream in a heat exchanger;c. separating hydrogen from olefin and heavy paraffinic components in the cooled compressed effluent vapor stream in a first separator to provide a first vapor stream and a first liquid stream;d. cooling the first vapor stream in the heat exchanger;e. separating hydrogen from olefin and heavy paraffinic components in the cooled first vapor stream in a second separator to provide a second vapor stream and a second liquid stream;f. warming the second vapor stream in the heat exchanger to produce a gas product;g. lowering the pressure of the first liquid stream in a first control valve to provide a pressure-reduced first liquid stream;h. dividing the second liquid stream into first liquid split stream and a second liquid split stream;i. lowering the pressure of the first liquid split stream in a second control valve to provide a pressure-reduced first liquid split stream;j. warming the pressure-reduced first liquid split stream in the heat exchanger to provide a partially vaporized stream;k. lowering the pressure of the second liquid split stream in a third control valve to provide a pressure-reduced second liquid split stream;l. flashing the pressure-reduced first liquid stream and the partially vaporized stream in a liquid product drum to provide a hydrogen-rich gas, which travels to a rectifier connected to the liquid product drum;m. combining the hydrogen-rich ...

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Номер записи: 78
05-10-2017 дата публикации

Integrated Nitrogen Removal in the Production of Liquefied Natural Gas Using Intermediate Feed Gas Separation

Номер: US20170284737A1
Автор: Chen Fei, Krishnamurthy Gowri, Liu Yang, Ott Christopher Michael, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A method and apparatus for liquefying a natural gas feed stream and removing nitrogen therefrom to produce a nitrogen-depleted LNG product, in which a natural gas feed stream is fed into the warm end of a main heat exchanger, cooled and at least partially liquefied, withdrawn from an intermediate location of the main heat exchanger and separated to form a nitrogen-enriched natural gas vapor stream and a nitrogen-depleted natural gas liquid stream, the liquid and vapor streams being reintroduced into an intermediate location of the main heat exchanger and further cooled in parallel to form a first LNG stream and a first at least partially liquefied nitrogen-enriched natural gas stream, respectively. 1. A method for producing a nitrogen-depleted LNG product , the method comprising:(a) introducing a natural gas feed stream into the warm end of a main heat exchanger, cooling and at least partially liquefying the natural gas feed stream, and withdrawing the cooled and at least partially liquefied stream from an intermediate location of the main heat exchanger;(b) expanding, partially vaporizing and separating the cooled and at least partially liquefied stream to form a nitrogen-enriched natural gas vapor stream and a nitrogen-depleted natural gas liquid stream;(c) withdrawing a portion of the nitrogen-enriched natural gas vapor stream to form a stripping gas stream;(d) separately re-introducing a remaining portion of the nitrogen-enriched natural gas vapor stream and the nitrogen-depleted natural gas liquid stream into an intermediate location of the main heat exchanger to further cooling the remaining portion of the nitrogen-enriched natural gas vapor stream and the nitrogen-depleted natural gas liquid stream in parallel, the remaining portion of the nitrogen-enriched natural gas vapor stream being further cooled and at least partially liquefied to form a first at least partially liquefied nitrogen-enriched natural gas stream and the nitrogen-depleted natural gas liquid ...

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Номер записи: 79
04-10-2018 дата публикации

NATURAL-GAS PURIFICATION APPARATUS

Номер: US20180280883A1
Автор: Eda Masayuki, Honjo Shintaro, Matsubara Wataru, Nakatani Hiromi, Okino Susumu, Yushima Masaki
Принадлежит: MITSUBISHI HEAVY INDUSTRIES, LTD.

A natural-gas purification apparatus includes: a compressor; a cooling unit that liquefies and separates a part of natural-gas liquid; a heating unit; first to third carbon-dioxide separation units that separate carbon dioxide through carbon-dioxide separation membranes; a detection carbon-dioxide separation unit that further separates carbon dioxide through a carbon-dioxide separation membrane; a carbon-dioxide-flow-rate sensor that detects the amount of carbon dioxide separated by the detection carbon-dioxide separation unit; an arithmetic control device that adjusts and controls at least one of the pressure to be applied by the compressor, the cooling temperature of the cooling unit, and the heating temperature of the heat unit based on information from the carbon-dioxide-flow-rate sensor such that the amount of carbon dioxide to be separated by the detection carbon-dioxide separation unit will be higher than or equal to a prescribed amount. 1. A natural-gas purification apparatus for purifying natural gas from ground by separating carbon dioxide from the natural gas , comprising:a pressure adjuster that adjusts a pressure of the natural gas from the ground;a natural-gas-liquid separator that liquefies and separates a part of natural-gas liquid by cooling the natural gas after the pressure adjustment by the pressure adjuster;a heater that heats the natural gas after the separation of the part of the natural-gas liquid by the natural-gas-liquid separator;a carbon-dioxide separator that separates carbon dioxide from the natural gas heated by the heater through a carbon-dioxide separation membrane;a detection carbon-dioxide separator that further separates carbon dioxide from purified gas obtained as a result of the carbon-dioxide separation by the carbon-dioxide separator through a carbon-dioxide separation membrane;a carbon-dioxide-amount detector that detects an amount of carbon dioxide separated by the detection carbon-dioxide separator; and a pressure of the ...

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Номер записи: 80
04-10-2018 дата публикации

Hydraulic Turbine Between Middle and Cold Bundles of Natural Gas Liquefaction Heat Exchanger

Номер: US20180283773A1
Автор: Downs Brian, Mondkar Suhas P., Sites O. Angus, Wright Steve
Принадлежит:

A system and method for liquefying a natural gas stream, including a liquefaction heat exchanger having at least three cooling bundles and arranged such that the natural gas stream passes sequentially therethrough. A first cooling bundle condenses heavy hydrocarbon components in the natural gas stream. A second cooling bundle liquefies the natural gas stream. A third cooling bundle sub-cools the LNG stream. A hydraulic turbine has an inlet operationally connected to an outlet of the second cooling bundle, and an outlet operationally connected to an inlet of the third cooling bundle. The hydraulic turbine cools the LNG stream and reduces the pressure of the LNG stream to form a reduced-pressure LNG stream. 1. A system for liquefying a natural gas stream , comprising:a liquefaction heat exchanger having at least three cooling bundles and arranged such that the natural gas stream passes sequentially therethrough, includinga first cooling bundle configured to condense heavy hydrocarbon components in the natural gas stream,a second cooling bundle configured to liquefy the natural gas stream, the second cooling bundle having an outlet for passing an LNG stream therethrough, anda third cooling bundle having an inlet to receive the LNG, the third cooling bundle configured to sub-cool the LNG stream; anda hydraulic turbine having an inlet operationally connected to the outlet of the second cooling bundle and an outlet operationally connected to the inlet of the third cooling bundle, the hydraulic turbine configured to cool the LNG stream and reduce a pressure of the LNG stream to form a reduced-pressure LNG stream.2. The system of claim 1 , further comprising:a first set of one or more sensors situated to sense at least one of a pressure and a temperature of the LNG stream prior to entering the hydraulic turbine; anda second set of one or more sensors situated to sense at least one of a pressure and a temperature of the LNG stream as the LNG stream exits the hydraulic ...

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Номер записи: 81
12-09-2019 дата публикации

BATH-TYPE VAPORISER-CONDENSER FOR A METHOD OF CRYOGENICALLY SEPARATING A NATURAL GAS STREAM

Номер: US20190277565A1
Автор: Terrien Paul
Принадлежит:

A method of cryogenically separating a natural gas supply stream into a gas which contains the most volatile compounds of the supply stream, and a liquid product which contains the heaviest compounds of the supply stream, including the following steps: at least partially condensing a natural gas supply stream in a first heat exchanger system; introducing the liquid product into a fractionation column in order to obtain, in the bottom of the fractionation column, a liquid produce that contains the heaviest compounds of the supply stream and, at the top of the fractionation column, a distillate that is at least partially condensed; introducing, at a stage in the upper part of the absorption column, the gaseous phase of the condensed distillate as a supply stream for the absorption column; where the distillate is condensed in a bath-type vaporizer-condenser installed in a casing mounted on the fractionation column. 15.-. (canceled)6. A process for the cryogenic separation of a natural gas feed stream into a gas containing the most volatile compounds of the feed stream and into a liquid product containing the heaviest compounds of the feed stream , comprising at least the following stages:Stage a): at least partial condensation of a natural gas feed stream in a first heat-exchange system;Stage b): introduction of the at least partially condensed stream resulting from stage a) into an absorption column at an introduction level located in the lower part of said absorption column, said absorption column producing, at the top, a gas stream containing the most volatile compounds and, at the bottom, a liquid product;Stage c): introduction of the liquid product resulting from stage b) into a fractionation column in order to obtain, in the fractionation column bottom, a liquid product containing the heaviest compounds of the feed stream and, at the fractionation column top, an at least partially condensed distillate;Stage d): introduction, at a level located in the upper part ...

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Номер записи: 82
10-09-2020 дата публикации

METHODS FOR PROVIDING REFRIGERATION IN NATURAL GAS LIQUIDS RECOVERY PLANTS

Номер: US20200284507A1
Автор: MCCOOL Grant, PUIGBO Arturo, WALTER Thomas
Принадлежит:

A process and plant for natural gas liquids (NGL) recovery includes a main heat exchanger, a cold gas/liquid separator, a separation or distillation column, and an overhead gas heat exchanger. A pressurized residue gas generated from an overhead gas stream removed the top of the separation or distillation column is expanded and used as a cooling medium in the overhead gas heat exchanger and the main heat exchanger. The expanded residue gas, used as a cooling medium, is then compressed up to a pressure to be combined with the overhead stream from the separation or distillation column. 1. A process for natural gas liquids (NGL) recovery comprising:introducing a natural gas feed stream into a main heat exchanger wherein the feed stream is cooled and partially condensed,introducing the partially condensed feed stream into a cold gas/liquid separator wherein the partially condensed feed stream is separated into a liquid fraction and a gaseous fraction,introducing the liquid fraction into a separation or distillation column,separating the gaseous fraction into a first portion and a second portion,cooling the first portion of the gaseous fraction in an overhead heat exchanger by indirect heat exchange with an overhead gaseous stream removed from the top of the separation or distillation column, and introducing the cooled and partially condensed first portion of the gaseous fraction into the separation or distillation column at a point above the introduction point of the liquid fraction into the separation or distillation column,expanding the second portion of the gaseous fraction and introducing the expanded second portion of the gaseous fraction into the separation or distillation column at a point above the introduction point of the liquid fraction into the separation or distillation column,removing a C2+ or C3+ liquid product stream (NGL) from the bottom of the separation or distillation column,removing the overhead gaseous stream from the top of the separation or ...

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Номер записи: 83
17-09-2020 дата публикации

HYDROCARBON GAS PROCESSING

Номер: US20200292230A1
Автор: Anguiano J. Ascencio, Hudson Hank M., Wilkinson John D.
Принадлежит:

A process and an apparatus are disclosed for the recovery of components from a hydrocarbon gas stream which is divided into first and second streams. The first stream is cooled, expanded to lower pressure, and supplied to a fractionation tower. The second stream is cooled and separated into vapor and liquid streams. The vapor stream is divided into two portions. A first portion is cooled, expanded to tower pressure, and supplied to the tower at an upper mid-column feed position. The second portion and the liquid stream are expanded to tower pressure and supplied to the tower. After heating, compressing, and cooling, a portion of the tower overhead vapor is cooled, expanded, and supplied to the tower at the top feed position. The quantities and temperatures of the feeds to the tower maintain the overhead temperature of the tower whereby the major portion of the desired components is recovered.

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Номер записи: 84
26-10-2017 дата публикации

LIQUEFACTION PROCESS FOR PRODUCING SUBCOOLED LNG

Номер: US20170307290A9
Автор: Kimmel Hans E.
Принадлежит: EBARA INTERNATION CORPORATION

A variable speed liquid LNG expander (X) and a variable speed two-phase LNG expander (X) in line, downstream from X. The rotational speed of both expanders can be controlled and changed independent from each other. The speed of expander X and expander X is determined in such way that the amount of liquid LNG downstream from the PHS compared to the feed gas supply is maximized and the amount of vapor and boil-off downstream of X is minimized. 1. A system for producing optimum sub-cooling of LNG to reduce boil-off losses at a liquefaction plant that produces LNG , the system comprising:A source of substantially nitrogen-free LNG;A nitrogen injector for Injecting nitrogen into pressurized natural gas at the liquefaction plant as a first step in sub-cooling the substantially nitrogen-free LNG, thereby producing a nitrogen-rich feed gas supply;A main heat exchanger for liquefying the nitrogen-rich feed gas supply to form nitrogen-rich, pressurized condensed LNG;A single-phase liquid expander contained within an initial surrounding vessel under inlet temperature, inlet pressure and inlet mass flow receiving the nitrogen-rich pressurized condensed LNG the single-phase expander having an adjustable rotational speed such that setting a rotational speed of the single-phase expander expands the LNG to outlet pressure, the single-phase expander operable to process the nitrogen-rich pressurized condensed LNG;A two-phase liquid expander contained within a second surrounding vessel operating in series with the single-phase expander to decrease boil-off gas and optimize a ratio between liquid LNG and vapor LNG, the two-phase expander having an adjustable rotational speed, wherein the two-phase expander is operable to process the nitrogen-rich pressurized condensed LNG received from the single-phase expander and separate the nitrogen from the LNG by evaporation of the nitrogen, the system optimized to produce subcooled liquid LNG to reduce boil-off losses.2. A system for optimum sub ...

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Номер записи: 85
25-10-2018 дата публикации

Method and system for preparing a lean methane-containing gas stream

Номер: US20180306498A1
Автор: Johannes Marinus VAN AMELSVOORT, Stefan Adrianus ROVERS
Принадлежит: Shell Oil Co

The invention relates to a method and system of preparing a lean methane-containing gas stream (22), comprising: —feeding a hydrocarbon feed stream (10) into a separator (100); —withdrawing from the separator (100) a liquid bottom stream (12); —passing the liquid bottom stream (12) to a stabilizer column (200); —withdrawing from the stabilizer column (200) a stabilized condensate stream (13) enriched in pentane, —withdrawing from the stabilizer column (200) a stabilizer overhead stream (14) enriched in ethane, propane and butane; —splitting the stabilizer overhead stream (14) according to a split ratio into a main stream portion (15) and a slip stream portion (16), —passing the slip stream portion (16) to a fractionation unit (300) to obtain an ethane enriched stream (17) and a bottom stream enriched in propane and butane (18).

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Номер записи: 86
25-10-2018 дата публикации

Process for Component Separation Utilizing Miscibility Depression Near a Freezing Point

Номер: US20180306501A1
Автор: Baxter Larry, Burt Stephanie, Davis Nathan, Hoeger Christopher, Mansfield Eric, Stitt Kyler
Принадлежит:

A process for separating a mixture of components is disclosed. A liquid mixture is provided to a separation vessel substantially near a temperature at which a product component freezes. The liquid mixture comprises the product component and a carrier component. The product component and the carrier component are essentially immiscible substantially near the temperature. The liquid mixture is separated into two or more phases, the two or more phases comprising a product component-rich liquid phase and a product component-depleted liquid phase. In this manner, a mixture of components is separated. 2. The process of claim 1 , providing the carrier component comprising any compound or mixture of compounds with a freezing point below the temperature.3. The process of claim 1 , providing the carrier component and the product component differing in dipole moment claim 1 , component solubility claim 1 , size claim 1 , shape claim 1 , hydrogen bonding characteristics claim 1 , densities claim 1 , mutual affinities claim 1 , or combinations thereof claim 1 , wherein they are prone to form separate phases substantially near the temperature.4. The process of claim 1 , providing the product component comprising carbon dioxide claim 1 , nitrogen oxide claim 1 , sulfur dioxide claim 1 , nitrogen dioxide claim 1 , sulfur trioxide claim 1 , hydrogen sulfide claim 1 , hydrogen cyanide claim 1 , water claim 1 , hydrocarbons claim 1 , mercury claim 1 , condensed organics claim 1 , or combinations thereof.5. The process of claim 1 , providing the separation vessel promoting a stable formation of two liquid phases by minimizing turbulence or other forms of mixing.6. The process of claim 1 , providing the separation vessel avoiding the phases coming to complete equilibrium by minimizing molecular transport and mixing rates.7. The process of claim 1 , providing the separation vessel maximizing mass and heat transfer coefficients between or among the two or more phases.8. The process of ...

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Номер записи: 87
09-11-2017 дата публикации

Method and apparatus for producing hydrocarbons

Номер: US20170320793A1
Автор: FRITZ Helmut
Принадлежит:

A method for producing hydrocarbons is proposed, in which a product stream containing hydrocarbons is produced from a methane-rich feed stream and from an oxygen-rich feed stream in a reaction unit which is configured for implementing a method for oxidative coupling of methane, the product stream or at least a stream formed therefrom being treated cryogenically in at least one separation unit using at least one liquid, methane-rich stream. It is provided that in the at least one separation unit () a recycle stream is formed from methane contained in product stream (c) and from methane contained in the at least one liquid, methane-rich stream (e, v), the recycle stream being fed to the reaction unit () as the methane-rich feed stream (a), and in that the liquid, methane-rich stream (e, v) is provided as makeup.

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Номер записи: 88
16-11-2017 дата публикации

NGL Recovery from a Recycle Stream Having Natural Gas

Номер: US20170328632A1
Автор: Prim Eric
Принадлежит:

A method for recovering natural gas liquids from a recycle stream having natural gas is provided. In one embodiment, a carbon dioxide recycle stream that comprises carbon dioxide, natural gas, and natural gas liquids is received. The carbon dioxide recycle stream is separated into a purified carbon dioxide recycle stream and a natural gas liquids stream. The purified carbon dioxide recycle stream comprises the carbon dioxide and the natural gas, and the natural gas liquids stream comprises the natural gas liquids. In another embodiment, a system comprises piping and a separator. The piping is configured to receive a recycle stream, and the separator is coupled to the piping and is configured to separate the recycle stream into a purified recycle stream and a natural gas liquids stream. 1. A method for producing a purified carbon dioxide (CO) recycle stream and a natural gas liquids (NGL) rich stream , comprising:{'sub': 2', '2', '2', '2', '1', '2', '3', '8', '2, 'cooling a COrecycle stream in a heat exchanger to produce a cooled COrecycle stream, wherein the COrecycle stream comprises CO, C-Chydrocarbons, C-Chydrocarbons, and HS;'}{'sub': 2', '2', '2', '2', '1', '2', '3', '8', '2, 'separating the cooled COrecycle stream into a cooled purified COrecycle stream and a sour NGL rich stream in a NGL stabilizer, wherein the cooled purified COrecycle stream comprises the COand the C-Chydrocarbons, and wherein the sour NGL rich stream comprises the C-Chydrocarbons and the HS;'}{'sub': 2', '2, 'heating the cooled purified COrecycle stream in the heat exchanger to produce the purified COrecycle stream; and'}separating the sour NGL rich stream into the NGL rich stream and an acid gas stream in a separator,{'sub': 3', '8, 'wherein the NGL rich stream comprises the C-Chydrocarbons, and'}{'sub': '2', 'wherein the acid gas stream comprises the HS.'}2. The method according to claim 1 , further comprising:recovering the NGL rich stream as usable product; and{'sub': '2', ' ...

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Номер записи: 89
08-10-2020 дата публикации

CO2 Removal or Capture from CO2-rich Gas Mixtures

Номер: US20200318897A1
Автор: Jianguo Xu
Принадлежит: Individual

Processes for separating CO2 from a gas mixture containing one or more of hydrogen, nitrogen, argon, CO, and methane or a combination thereof is described. The processes involve, for example, cooling and partial condensation of the gas mixture, preferably by a single loop refrigeration system with a mixed refrigerant, phase separation of the partially condensed stream, and distillation of the CO2-rich liquid stream. At least a portion of the liquid CO2 produced from the processes during the off-peak electricity demand hours can be stored and then heated, vaporized, further heated, and expanded for power generation during the peak electricity demand hours, helping balance the supply and demand of electricity of the electricity grid.

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Номер записи: 90
15-11-2018 дата публикации

METHODS FOR PRODUCING PRESSURIZED ALKENE GAS

Номер: US20180328657A1
Автор: RUMORE Nicole
Принадлежит:

Methods and systems for recovering alkene (e.g., C-Calkene) gas as well as producing pressurized alkene (e.g., C-Calkene) gas from process gas streams including lower concentrations of alkenes are provided herein. 1. A method for producing pressurized C-Calkene gas from a process gas stream comprising: {'sub': 2', '4', '2', '4, 'cooling the process gas stream comprising less than 80 wt % C-Calkene in at least one condenser vessel with a cooling medium under suitable conditions to produce a first condensate comprising C-Calkene and a vent gas stream, wherein the first condensate is collected in at least one condensate tank; and'}, 'a condensation cycle comprising halting flow of the process gas stream and the cooling medium to the at least one condenser vessel and flow of the first condensate stream to the at least one condensate tank when the first condensate reaches a first high level in the at least one condensate tank; and', {'sub': 2', '4', '2', '4, 'heating the at least one condensate tank to produce pressurized liquid C-Calkene and a C-Calkene vent gas.'}], 'a pressurization cycle comprising2. The method of claim 1 , wherein the process gas stream enters the at least one condenser vessel at a temperature of about −40° C. or lower and a pressure of at least about 90 kPa.3. The method of claim 1 , wherein the vent gas stream comprises nitrogen.4. The method of claim 1 , wherein the cooling medium is liquid nitrogen and/or gaseous nitrogen.5. The method of claim 1 , wherein the cooling medium is provided at a temperature of at least about −196° C. and a pressure of less than or equal to about 1500 kPa.6. The method of claim 1 , wherein the at least one condenser vessel comprises a shell and tube heat exchanger or a plate heat exchanger.7. The method of further comprising passing the pressurized liquid C-Calkene through a vaporizer operated under suitable conditions to produce the pressurized C-Calkene gas having a pressure of at least about 100 kPa and a ...

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Номер записи: 91
30-11-2017 дата публикации

Apparatus and System for Swing Adsorption Processes

Номер: US20170341011A1
Автор: Ananda Krishna Nagavarapu, Bennett D. Marshall, Bruce T. Kelley, Robert A. Johnson, William Barnes
Принадлежит: Individual

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

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Номер записи: 92
22-11-2018 дата публикации

Process for Separating Hydrogen from an Olefin Hydrocarbon Effluent Vapor Stream

Номер: US20180335254A1
Автор: Zhao James, Zhao Shukui
Принадлежит: EnFlex, Inc.

One or more specific embodiments disclosed herein includes a method for separating hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream, employing a single heat exchanger, multiple gas-liquid separators, multiple expander/compressor sets, and a rectifier attached to a liquid product drum. 1. A process for the separation of hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream from a dehydrogenation unit , which process comprises:a. cooling a compressed effluent vapor stream in a heat exchanger;b. separating hydrogen from olefin and heavy paraffinic components in the cooled compressed effluent vapor stream in a first separator to provide a first vapor stream and a first liquid stream;c. cooling the first vapor stream in the heat exchanger;d. separating hydrogen from olefin and heavy paraffinic components in the cooled first vapor stream in a second separator to provide a second vapor stream and a second liquid stream;e. warming the second vapor stream in the heat exchanger;f. isentropically expanding, in a high-pressure expander, the second vapor stream, wherein the pressure and temperature of the second vapor stream are lowered;g. warming the second vapor stream in the heat exchanger;h. compressing, in a high-pressure compressor, the second vapor stream;i. cooling the second vapor stream in a first discharge cooler;j. dividing the second vapor stream into a gas product and a split stream;k. withdrawing the gas product;l. compressing, in a low-pressure compressor, the split stream;m. cooling the split stream in a second discharge cooler and further cooling the split stream in the heat exchanger;n. isentropically expanding, in a low-pressure expander, the split stream, wherein the pressure and temperature of the split stream are lowered;o. cooling a liquid paraffinic stream in the heat exchanger;p. combining the cooled liquid paraffinic stream with the expanded split stream to provide a combined feed;q. vaporizing the combined ...

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Номер записи: 93
31-10-2019 дата публикации

SYSTEM AND METHOD FOR HIGH RECOVERY OF NITROGEN AND ARGON FROM A MODERATE PRESSURE CRYOGENIC AIR SEPARATION UNIT

Номер: US20190331418A1
Автор: Handley James R., KROMER Brian R., Prosser Neil M.
Принадлежит:

A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon and an overall nitrogen recovery of 98% or greater. The air separation is configured to produce a high purity oxygen enriched stream which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption prepurifier unit. Argon recovery is facilitated with the use of an argon superstaged column.

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Номер записи: 94
07-12-2017 дата публикации

PROCESS FOR LIQUEFYING NATURAL GAS AND CARBON DIOXIDE

Номер: US20170350647A1
Автор: COSTA DE BEAUREGARD Pierre, Murino Michele, PICHOT Delphine
Принадлежит:

A process for producing liquefied natural gas () and liquid carbon dioxide (CO) () comprising at least the following steps: Step a): separating a natural gas feed gas (), containing hydrocarbons and carbon dioxide in a treatment unit (), into a CO-enriched gas stream () and a CO-depleted natural gas stream (); step b): liquefying the CO-depleted natural gas stream () resulting from step a) in a natural gas liquefaction unit () comprising at least a main heat exchanger () and a system () for producing frigories; step c): simultaneous liquefying of the CO-enriched gas stream () resulting from step a) in a COliquefaction unit (); characterized in that all of the refrigeration necessary for the liquefaction of the CO-enriched gas stream () and for the liquefaction of the natural gas is supplied by said frigorie-producing system () of the natural gas liquefaction unit (). 1. A process for producing liquefied natural gas) and liquid carbon dioxide (CO) comprising the following steps:{'sub': 2', '2, 'Step a): separating a natural gas feed gas, containing hydrocarbons and carbon dioxide in a treatment unit, into a CO-enriched gas stream and a CO-depleted natural gas stream;'}{'sub': '2', 'Step b): liquefying the CO-depleted natural gas stream resulting from step a) in a natural gas liquefaction unit comprising at least a main heat exchanger and a system for producing frigories;'}{'sub': 2', '2, 'Step c): simultaneous liquefying of the CO-enriched gas stream resulting from step a) in a COliquefaction unit;'}{'sub': 2', '2, 'wherein all or some of the refrigeration necessary for the liquefaction of the CO-enriched gas stream and for the liquefaction of the natural gas is supplied by said frigorie-producing system of the natural gas liquefaction unit); and wherein the CO-enriched gas stream resulting from step a) is purified prior to step c), the refrigeration necessary for this purification being provided by said frigorie-producing system of the natural gas liquefaction unit ...

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Номер записи: 95
07-12-2017 дата публикации

PROCESS FOR LIQUEFYING CARBON DIOXIDE RESULTING FROM A NATURAL GAS STREAM

Номер: US20170350648A1
Автор: COSTA DE BEAUREGARD Pierre, Murino Michele, PICHOT Delphine
Принадлежит:

A process for producing liquefied natural gas and liquid carbon dioxide comprising: Step a): separating a natural gas feed gas into a CO-enriched gas stream and a CO-depleted natural gas stream; Step b): liquefying the CO-depleted natural gas stream in a liquefaction unit comprising at least a main heat exchanger and a system for producing frigories, said liquefaction unit comprising at least one refrigeration cycle fed by a refrigerant stream; Step c): simultaneous liquefying of the CO-enriched gas stream resulting from step a) in a COliquefaction unit; wherein the refrigeration necessary for the liquefaction of the CO-enriched gas stream and for the liquefaction of the natural gas is supplied by said frigorie-producing system of the liquefaction unit and in that the refrigeration necessary for the liquefaction of the CO-enriched gas stream originates from a portion of said refrigerant stream supplying the refrigeration cycle of said liquefaction unit. 2. The process according to claim 1 , wherein in that the CO-enriched gas stream resulting from step a) comprises at least 95 mol % of CO.3. The process according to claim 1 , wherein prior to step b) claim 1 , the natural gas stream resulting from step a) is pretreated in a pretreatment unit.4. The process according to claim 1 , wherein said treatment unit used in step a) is an amine scrubbing unit.5. The process according to claim 1 , wherein the CO-enriched gas stream resulting from step a) is purified prior to step c) claim 1 , the refrigeration necessary for this purification being provided by said frigorie-producing system of the natural gas liquefaction unit.6. The process according to claim 1 , wherein the CO-enriched stream thus purified comprises at least 99.5 mol % of CO.7. The process according to claim 1 , wherein said system for producing frigories comprises at least one compressor.8. The process according to claim 1 , wherein refrigerant stream supplying said at least one refrigeration cycle of said ...

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Номер записи: 96
06-12-2018 дата публикации

Hydrocarbon Gas Processing

Номер: US20180347898A1
Автор: Cuellar Kyle T., Hudson Hank M., Johnke Andrew F., Lewis W. Larry, Lynch Joe T., Miller Scott A., Pierce Michael C., Wilkinson John D.
Принадлежит:

A process and an apparatus are disclosed for a compact processing assembly to improve the recovery of C(or C) and heavier hydrocarbon components from a hydrocarbon gas stream. The preferred method of separating a hydrocarbon gas stream generally includes producing at least a substantially condensed first stream and a cooled second stream, expanding both streams to lower pressure, and supplying the streams to a fractionation tower. In the process and apparatus disclosed, the tower overhead vapor is directed to an absorbing means and a heat and mass transfer means inside a processing assembly. The outlet vapor from the processing assembly is compressed to higher pressure and cooled, then a portion is substantially condensed in a heat exchange means inside the processing assembly, expanded to lower pressure, and supplied to the heat and mass transfer means to provide cooling. Condensed liquid from the absorbing means is fed to the tower. 1. In a process for the separation of a gas stream containing methane , Ccomponents , Ccomponents , and heavier hydrocarbon components into a volatile residue gas fraction and a relatively less volatile fraction containing a major portion of said Ccomponents , Ccomponents , and heavier hydrocarbon components or said Ccomponents and heavier hydrocarbon components , in which process(a) said gas stream is treated in one or more heat exchange steps and at least one division step to produce at least a first stream that has been cooled under pressure to condense substantially all of it, thereby forming a substantially condensed first stream, and at least a second stream that has been cooled under pressure, thereby forming a cooled second stream;(b) said substantially condensed first stream is expanded to a lower pressure whereby it is further cooled, thereby forming an expanded further cooled first stream which is thereafter supplied at a top feed position on a distillation column that produces at least an overhead vapor stream and a bottom ...

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Номер записи: 97
06-12-2018 дата публикации

Hydrocarbon Gas Processing

Номер: US20180347899A1
Автор: Cuellar Kyle T., Hudson Hank M., Johnke Andrew F., Lewis W. Larry, Lynch Joe T., Miller Scott A., Pierce Michael C., Wilkinson John D.
Принадлежит:

A process and an apparatus are disclosed for a compact processing assembly to improve the recovery of C(or C) and heavier hydrocarbon components from a hydrocarbon gas stream. The preferred method of separating a hydrocarbon gas stream generally includes producing at least a substantially condensed first stream and a cooled second stream, expanding both streams to lower pressure, and supplying the streams to a fractionation tower. In the process and apparatus disclosed, the tower overhead vapor is directed to an absorbing means and a heat and mass transfer means inside a processing assembly. A portion of the outlet vapor from the processing assembly is compressed to higher pressure, cooled and substantially condensed in a heat exchange means inside the processing assembly, then expanded to lower pressure and supplied to the heat and mass transfer means to provide cooling. Condensed liquid from the absorbing means is fed to the tower. 1. In a process for the separation of a gas stream containing methane , Ccomponents , Ccomponents , and heavier hydrocarbon components into a volatile residue gas fraction and a relatively less volatile fraction containing a major portion of said Ccomponents , Ccomponents , and heavier hydrocarbon components or said Ccomponents and heavier hydrocarbon components , in which process(a) said gas stream is treated in one or more heat exchange steps and at least one division step to produce at least a first stream that has been cooled under pressure to condense substantially all of it, thereby forming a substantially condensed first stream, and at least a second stream that has been cooled under pressure, thereby forming a cooled second stream;(b) said substantially condensed first stream is expanded to a lower pressure whereby it is further cooled, thereby forming an expanded further cooled first stream which is thereafter supplied at a top feed position on a distillation column that produces at least an overhead vapor stream and a bottom ...

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Номер записи: 98
06-12-2018 дата публикации

METHOD OF LIQUEFYING A CO2 CONTAMINATED HYDROCARBON-CONTAINING GAS STREAM

Номер: US20180347901A1
Автор: GROENENDIJK Thijs, POORTE Raimo Edwin Gregor, RAGHAVAN Nirupa, VAN AKEN Michiel Gijsbert
Принадлежит:

The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream: (a) providing a CO2 contaminated hydrocarbon-containing gas stream (); (b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream (); (c) separating the partially liquefied stream obtaining a liquid stream (); (d) cooling the liquid stream () in a direct contact heat exchanger () obtaining a multiphase stream () containing at least a liquid phase and a solid CO2 phase; (e) separating the multiphase stream in a solid-liquid separator () obtaining a CO2 depleted liquid stream (); (f) passing the CO2 depleted liquid stream () to a further cooling, pressure reduction and separation stage to generate a further CO2 enriched slurry stream (); (g) passing at least part of the further CO2 enriched slurry stream () to the direct contact heat exchanger () to provide cooling duty to and mix with the liquid stream (). 1. A method of liquefying a contaminated hydrocarbon-containing gas stream , the method comprising at least the steps of:(a) providing a contaminated hydrocarbon-containing gas stream, the contaminant being CO2;(b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream;(c) separating the partially liquefied stream in a separator thereby obtaining a gaseous stream and a liquid stream;(d) cooling the liquid stream obtained in step (c) by passing the liquid stream to a direct contact heat exchanger thereby obtaining a multiphase stream, the multiphase stream containing at least a liquid phase and a solid phase, the solid phase containing CO2 particles;{'b': '202', '(e) separating the multiphase stream in a solid-liquid separator () thereby obtaining a CO2 depleted liquid stream and a CO2 enriched slurry stream;'}(f) passing the CO2 depleted liquid stream to a further cooling, pressure reduction and separation stage, the further cooling, pressure reduction and separation stage ...

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Номер записи: 99
14-11-2019 дата публикации

Modularized LNG Separation Device and Flash Gas Heat Exchanger

Номер: US20190346203A1
Автор: Chen Fei, Ott Christopher Michael, Roberts Mark Julian, Weist Annemarie Ott
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

Described herein are methods and systems for the liquefaction of natural gas to produce a LNG product. The methods and systems use an apparatus for separating a flash gas from a liquefied natural gas (LNG) stream to produce a LNG product and recovering refrigeration from the flash gas. The apparatus includes a shell casing enclosing a heat exchange zone comprising a coil wound heat exchanger, and a separation zone. The heat exchange zone is located above and in fluid communication with the separation zone. Flash gas is separated from the LNG product in the separation zone and flows upwards from the separation zone into the heat exchange zone where refrigeration is recovered from the separated flash gas. 1. An apparatus for separating a flash gas from a liquefied natural gas (LNG) stream to produce an LNG product , and for recovering refrigeration from the separated flash gas , the apparatus comprising a shell casing enclosing a heat exchange zone and a separation zone , the heat exchange zone being located above and in fluid communication with the separation zone , the separation zone configured to separate the flash gas from the LNG product and the heat exchange zone being configured to recover refrigeration from the separated flash gas;wherein the heat exchange zone comprises at least one coil wound tube bundle defining a tube side and a shell side of the heat exchange zone, the tube side defining one or more passages through the heat exchange zone for cooling and/or liquefying a first fluid stream, and the shell side defining a passage through the heat exchange zone for warming separated flash gas;wherein the separation zone is configured such that flash gas separated from the LNG product in the separation zone flows upwards from the separation zone into and through the shell side of the heat exchange zone; a first inlet in fluid flow communication with the tube side of the heat exchange zone for introducing the first fluid stream to be cooled and/or liquefied;', ...

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Номер записи: 100