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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 9. Отображено 9.
02-07-2015 дата публикации

SYNTHESIS OF DIACIDS

Номер: US20150183703A1
Автор: Pui Kwan Wong, Chuanzhao Li, Ludger Stubbs, Martin Van Meurs, Daniel Gait Anak Kumbang, Sharon Chun Yan Lim, Eite Drent
Принадлежит: Agency for Science, Technology and Research

The invention relates to a process for preparing a dicarboxylic acid comprising the steps: (a) heating a lactone in the presence of a first catalyst system to produce an alkenoic acid; and (b) contacting the alkenoic acid with carbon monoxide, water and a second catalyst system to produce a reaction composition comprising the second catalyst system and the dicarboxylic acid. 1. A process for preparing a dicarboxylic acid comprising the steps:(a) heating a lactone in the presence of a first catalyst system to produce an alkenoic acid; and(b) contacting the alkenoic acid with carbon monoxide, water and a second catalyst system to produce a reaction composition comprising the second catalyst system and the dicarboxylic acid.2. The process of claim 1 , wherein step (a) is carried out substantially in the absence of water.3. The process of or claim 1 , wherein the heating of the lactone in step (a) comprises reactive distillation claim 1 , thereby providing a distillate comprising the alkenoic acid.4. The process of any one of to claim 1 , wherein step (a) is carried out at a temperature at or above the normal boiling point of the lactone.5. The process of any one of to claim 1 , wherein the first catalyst system comprises an acidic catalyst.6. The process of any one of to claim 1 , wherein the first catalyst system comprises a heterogeneous solid catalyst.7. The process of any one of to claim 1 , wherein the first catalyst system comprises a homogeneous catalyst.8. The process of any one of to claim 1 , wherein the first catalyst system comprises one or more of alumina claim 1 , silica claim 1 , a zeolite claim 1 , a clay claim 1 , sulphuric acid claim 1 , p-toluenesulfonic acid and methanesulfonic acid.9. The process of any one of to claim 1 , wherein the first catalyst system comprises a mixture alumina and silica.10. The process of any one of to claim 1 , wherein the alkenoic acid comprises a plurality of isomers.11. The process of any one of to claim 1 , wherein ...

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Номер записи: 1
10-04-2014 дата публикации

DIVIDER FOR USE WITH BIOLISTIC BOMBARDMENT DEVICE

Номер: US20140099702A1
Автор: Li Eric Chuanzhao, RAIRDAN GREGORY J.
Принадлежит: E.I. Du Pont De Nemours and Company

The present invention is designed for use with a biolistic bombardment device having a cold gas shock wave splitter that divides a cold gas shock wave into two or more separate pressure waves that burst into one or more macrocarrier disks so as to create two or more separate microparticle groups. In various embodiments, the present invention provides a divider that is configured to define two or more separate bombardment areas, each configured to contain a respective target and to receive a separate one of the microparticle groups created by a cold gas shock wave splitter. In such a manner, the present invention avoids mixing of microparticles between microparticle groups and allows for independent biolistic bombardment of the targets. 14-. (canceled)5. A system configured for the independent biolistic bombardment of two or more individual targets containing target cells , the system comprising:a biolistic bombardment device comprising a cold gas shock wave splitter that divides a cold gas shock wave into two or more separate pressure waves that burst into one or more macrocarriers so as to create two or more separate microparticle groups that enter into a bombardment chamber at two or more respective launch areas and that propel toward the target cells; anda divider comprising a base plate configured to support the two or more individual targets containing the target cells and at least one dividing wall extending upward from the base plate, wherein a top edge of the at least one dividing wall is positioned between the two or more launch areas, and wherein the base plate and the dividing wall define at least two separate bombardment areas each configured to contain a respective target and to receive one of the separate microparticle groups, thus preventing mixing of the microparticles between the two or more microparticle groups and allowing independent biolistic bombardment of the targets.6. The system of claim 5 , wherein the cold gas shock wave splitter comprises ...

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Номер записи: 2
14-05-2015 дата публикации

Process to produce a diene from a lactone

Номер: US20150133685A1
Автор: Chuanzhao Li, Ludger STUBBS, Martin van MEURS, Pui Kwan Wong
Принадлежит: Agency for Science Technology and Research Singapore

The invention provides a process for the production of a diene. In the process, a lactone is heated in the presence of a first catalyst system to produce an alkene and carbon dioxide and the alkene is contacted with a second catalyst system to produce an alkyldiene.

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Номер записи: 3
30-12-1998 дата публикации

A novel process for the production of high purity and ultrapure bisphenol-a

Номер: EP0683761B1
Автор: Chuanzhao Li, Minhua Zhang, Qiu Tan, Shenbo Yu, Shenghua Qian, Zongzhang Liu
Принадлежит: China Petrochemical Corp, TIANJIN UNIVERSITY

A process for the production of high purity and ultrapure bisphenol-A is provided in which 4-12 mol phenol is reacted with 1 mol acetone in a multistage suspended bed reactor column (41) comprising a plurality of perforated trays (42) and downcomers (43) both having screens (44 and 45) provided thereon and catalytic resin particles (46) placed on the screens (44 and 45) in association with the trays (42). In operation, all of phenol is charged to the uppermost tray and all the required acetone is introduced to the column (41) through several inlets (52) along the wall of the column (41). An inert gas rising through the trays (42) and the catalytic particles (46) thereon stirs the reaction liquid and particles (46) therein to form a suspension and strips water generated during the reaction of phenol and acetone. Subsequently, the reaction mixture in the column is cooled to form adduct crystals of bisphenol-A with phenol and mother liquor, the adduct crystals are separated from the mother liquor, and phenol is removed from the adduct crystals. As a result of the stripping of water from the reaction mixture, high quality bisphenol-A can be obtained without the inclusion of concentration step before crystallization.

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Номер записи: 4
30-06-2011 дата публикации

Divider for use with biolistic bombardment device

Номер: US20110159577A1
Автор: Eric Chuanzhao Li, Gregory J. Rairdan
Принадлежит: EI Du Pont de Nemours and Co

The present invention is designed for use with a biolistic bombardment device having a cold gas shock wave splitter that divides a cold gas shock wave into two or more separate pressure waves that burst into one or more macrocarrier disks so as to create two or more separate microparticle groups. In various embodiments, the present invention provides a divider that is configured to define two or more separate bombardment areas, each configured to contain a respective target and to receive a separate one of the microparticle groups created by a cold gas shock wave splitter. In such a manner, the present invention avoids mixing of microparticles between microparticle groups and allows for independent biolistic bombardment of the targets.

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Номер записи: 5
28-05-2002 дата публикации

A novel process for the production of high purity and ultrapure bisphenol-a

Номер: CA2155860C
Автор: Chuanzhao Li, Minhua Zhang, Qiu Tan, Shenbo Yu, Shenghua Qian, Zongzhang Liu
Принадлежит: China Petrochemical Corp, TIANJIN UNIVERSITY

A process for the production of high purity and ultrapure bisphenol-A is provided in which 4-12 mol phenol is reacted with 1 mol acetone in a multistage suspended bed reactor column (41) comprising a plurality of perforated trays (42) and downcomers (43) both having screens (44 and 45) provided thereon and catalytic resin particles (46) placed on the screens (44 and 45) in association with the trays (42). In operation, all of phenol is charged to the uppermost tray and all the required acetone is introduced to the column (41) through several inlets (52) along the wall of the column (41). An inert gas rising through the trays (42) and the catalytic particles (46) thereon stirs the reaction liquid and particles (46) therein to form a suspension and strips water generated during the reaction of phenol and acetone. Subsequently, the reaction mixture in the column is cooled to form adduct crystals of bisphenol-A with phenol and mother liquor, the adduct crystals are separated from the mother liquor, and phenol is removed from the adduct crystals. As a result of the stripping of water from the reaction mixture, high quality bisphenol-A can be obtained without the inclusion of concentration step before crystallization.

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Номер записи: 6
13-05-1997 дата публикации

Dephenolizing process for production of high-quality polycarbonate grade bisphenol A

Номер: US5629457A
Автор: Chuanzhao Li, Minhua Zhang, Shenbo Yu, Shenghua Qian, Zongzhang Liu
Принадлежит: China Petrochemical Corp, TIANJIN UNIVERSITY

A process for producing high-quality polycarbonate grade bisphenol A directly by removing phenol from the adduct crystal of bisphenol A with phenol via a gas-solid reaction at low temperature comprises directly feeding the adduct crystal into a vacuum or pneumatic dephenolizing device under vacuum a inert gas stream, controlling the temperature of the adduct crystal below its melting point, decomposing the adduct crystal into gas phase and solid phase, removing the gas phase phenol and condensing phenol for recovery, well leaving the rest being the desirable bisphenol A. The process possesses easy operation, short procedure, low energy consumption, and high purity and good color of bisphenol A obtained. Bisphenol A produced according to the process of the invention may be used as the raw material for producing polycarbonates for optical use.

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Номер записи: 7
03-10-2013 дата публикации

A process to produce a diene from a lactone

Номер: WO2013147708A2
Автор: Chuanzhao Li, Ludger STUBBS, Martin van MEURS, Pui Kwan Wong
Принадлежит: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

The invention provides a process for the production of a diene. In the process, a lactone is heated in the presence of a first catalyst system to produce an alkene and carbon dioxide and the alkene is contacted with a second catalyst system to produce an alkyldiene.

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Номер записи: 8
09-06-2016 дата публикации

A process to produce a diene from a lactone

Номер: WO2013147708A3
Автор: Chuanzhao Li, Ludger STUBBS, Martin van MEURS, Pui Kwan Wong
Принадлежит: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

The invention relates to a process for the production of a diene. In the process, a lactone is heated in the presence of a first catalyst system to produce an alkene and carbon dioxide and the alkene is contacted with a second catalyst system to produce an alkyldiene. The invention further relates to a process of converting the side-product alkenoic acid through reaction with carbon monoxide, water and a third catalyst system to a dicarboxylic acid.

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Номер записи: 9