公开(公告)号：US4931571A

公开(公告)日：1990-06-05

申请号：US335379

申请日：1989-04-10

Applicant: Robert M. Weinstein

Inventor： Robert M. Weinstein

IPC: C07D301/02

CPC classification number: C07D301/02

Abstract: An alkylene oxide, e.g. ethylene oxide, is prepared from the corresponding alkylene carbonate, e.g. ethylene carbonate, in the presence of an effective amount of a quaternary arsonium halide. The quaternary arsonium halides are also effective catalysts for the reverse reaction, that is, to form alkylene carbonates from the corresponding epoxide and carbon dioxide.

Abstract translation: 环氧烷，例如 环氧乙烷由相应的碳酸亚烃酯制备，例如 在有效量的四卤化钌的存在下进行。 四卤化钌也是用于反向反应的有效催化剂，即从相应的环氧化物和二氧化碳形成碳酸亚烷基酯。

公开(公告)号：US4921681A

公开(公告)日：1990-05-01

申请号：US178928

申请日：1988-04-07

Applicant: Brian J. Ozero ,  Stanley D. Becker

Inventor： Brian J. Ozero ,  Stanley D. Becker

IPC: B01J8/06 ,  C07D301/10

CPC classification number: B01J8/067 ,  C07D301/10 ,  B01J2208/00212

Abstract: Improved performance is obtained in a multi-tube reactor for oxidation of ethylene to ethylene oxide by providing a distribution zone for the coolant located downstream of the catalyst and a contiguous cooling zone. The effluent gases from the oxidation are cooled in the cooling zone by a fluid, which has been only slightly preheated and distributed uniformly in the distribution zone by contact with tubes in which the effluent gases are in low-turbulence flow. Uniform distribution of the coolant provides substantially equal cooling of the effluent gases in each tube, thus minimizing the variation in effluent gas temperature among the tubes. Preferably, the tubes in the cooling section are packed with inert particles to facilitate heat transfer, while the tubes are empty in the distribution section to reduce heat transfer.

Abstract translation: 在用于将乙烯氧化成环氧乙烷的多管反应器中获得改进的性能，为位于催化剂下游的冷却剂和连续的冷却区提供分配区。 来自氧化的流出气体在冷却区中被流体冷却，该流体仅通过与流出气体处于低湍流的管接触而仅稍微预热并均匀分布在分布区域中。 冷却剂的均匀分布为每个管中的流出气体提供了基本相同的冷却，从而使管中的废气温度的变化最小化。 优选地，冷却部分中的管装有惰性颗粒以促进热传递，而管在分配部分中是空的，以减少热传递。

公开(公告)号：US4760042A

公开(公告)日：1988-07-26

申请号：US361304

申请日：1982-03-24

Applicant: William D. Armstrong

Inventor： William D. Armstrong

IPC: B01J23/66 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  C07D301/10 ,  C07D303/04 ,  B01J21/04 ,  B01J21/08 ,  B01J23/04 ,  B01J23/50

CPC classification number: C07D301/10 ,  B01J23/66 ,  B01J35/023 ,  B01J35/10 ,  B01J35/1009 ,  B01J37/0205

Abstract: A supported silver catalyst for the oxidation of ethylene with molecular oxygen to ethylene oxide is made by depositing silver on a support capable of selectively adsorbing alkali metals, activating the silver under conditions chosen to provide the optimum selectivity to ethylene oxide and thereafter depositing an amount of an alkali metal sufficient to increase selectivity of the silver catalyst above its alkali-free state. The catalyst most preferably employs a ceramic support having a surface area of 0.3-0.8 m.sup.2 /gm. The amount of alkali metal on the finished catalyst is most preferably 50-300 ppm by weight. The catalyst may also include additional promoters, such as the alkaline earth metals, preferably barium.

Abstract translation: 通过在能够选择性吸附碱金属的载体上沉积银，在选择为使环氧乙烷提供最佳选择性的条件下活化银，然后沉积一定量的 足以使银催化剂的选择性高于其无碱状态的碱金属。 催化剂最优选使用表面积为0.3-0.8m 2 / gm的陶瓷载体。 成品催化剂上的碱金属的量最优选为50-300重量ppm。 催化剂还可以包括另外的助催化剂，例如碱土金属，优选钡。

公开(公告)号：US20240377371A1

公开(公告)日：2024-11-14

申请号：US18654774

申请日：2024-05-03

Applicant: Scientific Design Company, Inc.

Inventor： VIKAS KUMAR CHALKA ,  Mansoor HUSAIN ,  SOMNATH CHOWDHURY ,  SANDIP KUMAR LAHIRI

IPC: G01N30/86 ,  G01N30/72

Abstract: The invention relates to a method of generating a signal for adjusting a parameter of a process for ethylene oxide production comprising the steps: Acquiring process data of a reactor producing ethylene oxide by means of sensors, Determining a parametric coefficient from the acquired process data, and Calculating the selectivity and/or activity of the catalyst from the parametric coefficient.

公开(公告)号：US20240024857A1

公开(公告)日：2024-01-25

申请号：US17867950

申请日：2022-07-19

Applicant: Scientific Design Company, Inc.

Inventor： Xiankuan Zhang ,  Christelle Verrier

IPC: B01J23/50 ,  B01J21/04 ,  B01J23/36 ,  B01J35/08 ,  B01J35/00

CPC classification number: B01J23/50 ,  B01J21/04 ,  B01J23/36 ,  B01J35/08 ,  B01J35/006 ,  B82Y30/00

Abstract: A conditioning process that is employed with a high selectivity catalyst (HSC) during an initial phase (i.e., start-up) of the epoxidation process is provided. The HSC conditioning process of the present disclosure ensures that the heat release from a catalyst bed containing an HSC during a start-up operation is less than 2000 kJ/Kgcat·hr. The HSC containing catalyst bed that has been conditioned by the process of the present disclosure exhibits improved performance (i.e., EO selectivity) and reduced hot spots.

公开(公告)号：US20220193650A1

公开(公告)日：2022-06-23

申请号：US17130961

申请日：2020-12-22

Applicant: Scientific Design Company, Inc.

Inventor： Mohammad Ganjvar

IPC: B01J37/02 ,  C07D301/10 ,  B01J23/50

Abstract: An ethylene oxide (EO) reactor is provided in which a removable impingement basket is configured to be inserted into the reactor inlet pipe of the EO reactor. The removable impingement basket provides protection for the silver-based catalyst filled tubes and other components that are present inside the EO reactor as well as providing another access point into the EO reactor. The removable impingement basket also can provide better distribution of the inlet gas as compared to an EO reactor containing a non-removable impingement plate.

公开(公告)号：US20190330134A1

公开(公告)日：2019-10-31

申请号：US16399153

申请日：2019-04-30

Applicant: Scientific Design Company, Inc.

Inventor： Chun Chau Chan ,  Eunice Yamada ,  Barry Jay Billig ,  Shaun McGovern

IPC: C07C29/152 ,  C07C29/153

Abstract: An improved catalytic hydration process that includes a catalytic hydration reaction section containing adiabatic reactors with ion exchange resin catalyst and which maintains low resin swelling and excellent selectivity while also reducing process complexity and increasing versatility.

公开(公告)号：US10160709B2

公开(公告)日：2018-12-25

申请号：US15672927

申请日：2017-08-09

Applicant: Scientific Design Company, Inc.

Inventor： Saurabh Katiyar

IPC: C07C41/42 ,  B01D5/00 ,  C07C43/13 ,  B01D3/06 ,  B01D3/14 ,  B01D19/00

Abstract: A process for the preparation of glycol ethers by providing a diethylene glycol ether column bottoms mixture comprising triethylene glycol ether, tetraethylene glycol ether, and glycol ether catalyst; separating, in a stripping column, the column bottom mixture into a triethylene glycol ether vapor overhead and a liquid bottoms; and separating, in an evaporator, the liquid bottoms into a residue containing about 80% to about 90% tetraethylene glycol ether and an evaporator overhead comprising at least about 60% tetraethylene glycol ether.

公开(公告)号：US20180326402A1

公开(公告)日：2018-11-15

申请号：US15834365

申请日：2017-12-07

Applicant: Scientific Design Company, Inc.

Inventor： Wojciech L. Suchanek ,  Paul E. Ellis, JR. ,  Michael Di Mare ,  Jean Adam

IPC: B01J23/50 ,  B01J21/04 ,  B01J35/00 ,  B01J35/10 ,  B01J37/00 ,  B01J37/04 ,  B01J37/08 ,  B01J37/02 ,  C07D301/10 ,  B01D71/02 ,  B01D53/22

CPC classification number: B01J23/50 ,  B01D53/22 ,  B01D71/022 ,  B01J21/04 ,  B01J35/0006 ,  B01J35/1009 ,  B01J37/0018 ,  B01J37/0201 ,  B01J37/04 ,  B01J37/082 ,  C07D301/10

Abstract: A precursor mixture for producing a porous body, wherein the precursor mixture comprises: (i) at least one milled alpha alumina powder having a particle size of 0.1 to 6 microns, (ii) non-silicate powder that functions as a binder of the alpha alumina powders, and (iii) at least one burnout material having a particle size of 1-10 microns and a decomposition temperature of less than 550° C., with the proviso that a burnout material having a decomposition temperature of 550° C. or greater is excluded from the precursor mixture.

公开(公告)号：US10040055B2

公开(公告)日：2018-08-07

申请号：US15579419

申请日：2016-06-02

Applicant: SCIENTIFIC DESIGN COMPANY, INC.

Inventor： Christelle Verrier ,  Wojciech L. Suchanek

IPC: B01J21/04 ,  B01J21/08 ,  B01J21/12 ,  B01J23/04 ,  B01J23/36 ,  B01J23/50 ,  B01J35/10 ,  B01J19/00 ,  C07D301/10 ,  B01J37/00

Abstract: A method is provided for improving the performance of a silver-based epoxidation catalyst comprising a carrier. The carrier includes at least 80 percent alpha alumina and has a pore volume from 0.3 mL/g to 1.2 mL/g, a surface area from 0.3 m2/g to 3.0 m2/g, and a pore architecture that provides at least one of a tortuosity of 7 or less, a constriction of 4 or less and a permeability of 30 mdarcys or greater. A catalytic amount of silver and a promoting amount of one or more promoters is disposed on and/or in said carrier. The method further includes the steps of initiating an epoxidation reaction by reacting a feed gas composition containing ethylene and oxygen present in a ratio of from about 3.5:1 to about 12:1, in the presence of the silver-based epoxidation catalyst at a temperature of about 200° C. to about 230° C., and subsequently increasing the temperature either stepwise or continuously.