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

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Применить Всего найдено 7. Отображено 7.
07-01-2014 дата публикации

Process for rejuvenating a catalyst composition

Номер: US0008623777B2
Автор: Terry Eugene Helton, Vijay Nanda, Wei-Ping Tai, Teresa Ann Jurgens-Kowal, Kathleen Marie Keville, HELTON TERRY EUGENE, NANDA VIJAY, TAI WEI-PING, JURGENS-KOWAL TERESA ANN, KEVILLE KATHLEEN MARIE
Принадлежит: ExxonMobil Chemical Patents Inc., HELTON TERRY EUGENE, NANDA VIJAY, TAI WEI-PING, JURGENS-KOWAL TERESA ANN, KEVILLE KATHLEEN MARIE, EXXONMOBIL CHEM PATENTS INC, EXXONMOBIL CHEMICAL PATENTS INC.

This disclosure relates to a method for rejuvenating a catalyst, comprising contacting the catalyst with a gaseous feedstock at rejuvenation conditions for at least one hour to form a rejuvenated catalyst and a gaseous product, wherein the catalyst comprises at least 10 wt. % of a molecular sieve, wherein the catalyst prior to the contacting step comprises from 0.001 wt. % to 45 wt. % of hydrocarbons and 0.001 to 10 wt. % nitrogen containing components based on the total weight of the catalyst prior to the contacting step, wherein the molecular sieve comprises at least one of a MCM-22 family molecular sieve, a molecular sieve having a framework type of *BEA, a molecular sieve having a framework type of FAU, and a molecular sieve having a framework type of MOR, wherein the gaseous feedstock comprises at least one of N 2 , H 2 , alkane, He, Ar, CO, and CO 2 , wherein the gaseous product has at least a portion of the gaseous feedstock and at least a portion of the hydrocarbons of the catalyst and at least a portion of the nitrogen containing components of the catalyst, wherein the rejuvenation conditions comprise a temperature in the range from about 400 to 600° C., a pressure in the range from about 101.3 kPa-a to 10130 kPa-a, a space hourly velocity in the range of from 0.05 to 10 hr −1 .

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Номер записи: 1
11-11-2010 дата публикации

Process for Rejuvenating a Catalyst Composition

Номер: US20100285949A1
Автор: Terry Eugene Helton, Vijav Nanda, Wei-Ping Tai, Teresa Ann Jurgens-Kowal, Kathleen Marie Keville
Принадлежит:

This disclosure relates to a method for rejuvenating a catalyst, comprising contacting the catalyst with a gaseous feedstock at rejuvenation conditions for at least one hour to form a rejuvenated catalyst and a gaseous product, wherein the catalyst comprises at least 10 wt. % of a molecular sieve, wherein the catalyst prior to the contacting step comprises from 0.001 wt. % to 45 wt. % of hydrocarbons and 0.001 to 10 wt. % nitrogen containing components based on the total weight of the catalyst prior to the contacting step, wherein the molecular sieve comprises at least one of a MCM-22 family molecular sieve, a molecular sieve having a framework type of *BEA, a molecular sieve having a framework type of FAU, and a molecular sieve having a framework type of MOR, wherein the gaseous feedstock comprises at least one of N2, H2, alkane, He, Ar, CO, and CO2, wherein the gaseous product has at least a portion of the gaseous feedstock and at least a portion of the hydrocarbons of the catalyst and ...

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Номер записи: 2
28-06-2005 дата публикации

Regeneration of aromatic alkylation catalysts using hydrocarbon stripping

Номер: US0006911568B1
Автор: Ajit B. Dandekar, John P. McWilliams, C. Morris Smith, Michael A. Better, Wei-Ping Tai, DANDEKAR AJIT B, MCWILLIAMS JOHN P, SMITH C MORRIS, BETTER MICHAEL A, TAI WEI-PING, DANDEKAR AJIT B., MCWILLIAMS JOHN P., SMITH C. MORRIS, BETTER MICHAEL A.
Принадлежит: ExxonMobil Oil Corporation, EXXONMOBIL OIL CORP, EXXONMOBIL OIL CORPORATION

A process for alkylating an alkylatable aromatic compound is disclosed, in which the process includes: (a) contacting the alkylatable aromatic compound and an alkylating agent with an alkylation catalyst under alkylation conditions; and (b) when said alkylation catalyst has become at least partially deactivated, contacting said alkylation catalyst with a C1-C8 hydrocarbon under alkylation catalyst reactivation conditions. The process provides comparable rejuvenation of catalyst activity as air rengenaration with minimal or no increase in amounts of undesirable byproducts such as polypropylbenzenes in the case of benzene alkylation with propylene.

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Номер записи: 3
03-12-2020 дата публикации

Catalyst Compositions and Their Use in Aromatic Alkylation Processes

Номер: US20200376471A1
Автор: Matthew S. Ide, Brett T. Loveless, Doron Levin, William W. Lonergan, Matthew J. Vincent, Wei-Ping Tai, Federico Barrai, IDE MATTHEW S, LOVELESS BRETT T, LEVIN DORON, LONERGAN WILLIAM W, VINCENT MATTHEW J, TAI WEI-PING, BARRAI FEDERICO, Ide, Matthew S., Loveless, Brett T., Levin, Doron, Lonergan, William W., Vincent, Matthew J., Tai, Wei-Ping, Barrai, Federico
Принадлежит:

Catalyst compositions comprising a zeolite and a mesoporous support or binder are disclosed. The mesoporous support or binder comprises a mesoporous metal oxide having a particle diameter of greater than or equal to 20 μm at 50% of the cumulative pore size distribution (d50). Also disclosed are processes for producing a mono-alkylated aromatic compound (e.g., ethylbenzene or cumene) which exhibit improved yield of the mono-alkylated aromatic compound using alkylation catalysts comprising one or more of these catalyst compositions. 124-. (canceled)25. A catalyst composition comprising a zeolite and a mesoporous binder , said mesoporous binder is a mesporous metal oxide which has a particle diameter of greater than or equal to 20 μm at a median value of the particle size distribution in a sample where the value of the particle diameter is at 50% of the cumulative distribution and a pore volume of less than 1 cc/g , said mesoporous metal oxide has an alumina content of greater than or equal to 75% , by weight , wherein said catalyst composition has a surface area of less than or equal to 300 m/g as measured by ASTM D4284.26. The catalyst composition of claim 25 , wherein said zeolite has a framework structure which includes one or more of BEA* claim 25 , FAU claim 25 , MOR claim 25 , and MWW.27. The catalyst composition of claim 26 , wherein said framework structure which includes BEA* is zeolite beta claim 26 , said framework structure which includes FAU includes one or more of faujasite claim 26 , zeolite Y claim 26 , USY claim 26 , Deal-Y claim 26 , UHP-Y claim 26 , and REY claim 26 , said framework structure which includes MOR includes one or more of mordenite claim 26 , TEA-mordenite claim 26 , EMM-34 claim 26 , and UZM 14 claim 26 , said framework structure which comprises MWW is a MCM-22 family material selected from the group consisting of MCM-22 claim 26 , PSH-3 claim 26 , SSZ-25 claim 26 , MCM-36 claim 26 , MCM-49 claim 26 , MCM-56 claim 26 , ERB-1 claim 26 , ...

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Номер записи: 4
09-04-2024 дата публикации

Catalyst compositions and their use in aromatic alkylation processes

Номер: US0011951463B2
Автор: Matthew S. Ide, Brett T. Loveless, Doron Levin, William W. Lonergan, Matthew J. Vincent, Wei-Ping Tai, Federico Barrai
Принадлежит: ExxonMobil Engineering & Technology Company, ExxonMobil Chemical Patents Inc.

Catalyst compositions comprising a zeolite and a mesoporous support or binder are disclosed. The mesoporous support or binder comprises a mesoporous metal oxide having a particle diameter of greater than or equal to 20 μm at 50% of the cumulative pore size distribution (d50). Also disclosed are processes for producing a mono-alkylated aromatic compound (e.g., ethylbenzene or cumene) which exhibit improved yield of the mono-alkylated aromatic compound using alkylation catalysts comprising one or more of these catalyst compositions.

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Номер записи: 5
25-06-2009 дата публикации

A process for rejuvenating a catalyst composition

Номер: WO2009058522A3
Автор: Kathleen M Keville, Teresa A Jurgens-Kowal, Terry E Helton, Vijay Nanda, Wei-Ping Tai
Принадлежит: Exxonmobil Chem Patents Inc, Kathleen M Keville, Teresa A Jurgens-Kowal, Terry E Helton, Vijay Nanda, Wei-Ping Tai

This disclosure relates to a method for rejuvenating a catalyst, comprising contacting the catalyst with a gaseous feedstock at rejuvenation conditions for at least one hour to form a rejuvenated catalyst and a gaseous product, wherein the catalyst comprises at least 10 wt.% of a molecular sieve, wherein the catalyst prior to the contacting step comprises from 0.001 wt.% to 45 wt.% of hydrocarbons and 0.001 to 10 wt.% nitrogen containing components based on the total weight of the catalyst prior to the contacting step, wherein the molecular sieve comprises at least one of a MCM-22 family molecular sieve, a molecular sieve having a framework type of *BEA, a molecular sieve having a framework type of FAU, and a molecular sieve having a framework type of MOR, wherein the gaseous feedstock comprises at least one of N2, H2, alkane, He, Ar, CO, and CO2, wherein the gaseous product has at least a portion of the gaseous feedstock and at least a portion of the hydrocarbons of the catalyst and at least a portion of the nitrogen containing components of the catalyst, wherein the rejuvenation conditions comprise a temperature in the range from about 400 to 6000C, a pressure in the range from about 101.3 kPa-a to 10130 kPa-a, a space hourly velocity in the range of from 0.05 to 10 hr-1.

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Номер записи: 6
10-10-2023 дата публикации

Composição de catalisador para uso em processos de alquilação aromática e processo para produzir um composto aromático monoalquilado

Номер: BR112019020215B1
Автор: Brett T. Loveless, Doron Levin, Federico Barrai, Matthew J. Vincent, Matthew S. IDE, Wei-Ping Tai, William W. LONERGAN
Принадлежит: ExxonMobil Chemical Patents Inc

trata-se de composições de catalisador que compreendem um zeólito e um suporte ou aglutinante mesoporoso. o suporte ou aglutinante mesoporoso compreende um óxido de metal mesoporoso que tem um diâmetro de partícula maior ou igual a 20 µm a 50% da distribuição de tamanho de poro cumulativa (d50). também são divulgados processos para produzir um composto aromático monoalquilado (por exemplo, etilbenzeno ou cumeno) que exibem rendimento aumentado do composto aromático monoalquilado com o uso de catalisadores de alquilação que compreendem uma ou mais destas composições de catalisador.

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Номер записи: 7