公开(公告)号：US4879396A

公开(公告)日：1989-11-07

申请号：US22498

申请日：1987-03-06

Applicant: Brian J. Ozero

Inventor： Brian J. Ozero

IPC: C07D301/10 ,  C07D301/32

CPC classification number: C07D301/10 ,  C07D301/32

Abstract: An improved process is disclosed for producing ethylene oxide; the process utilizing suitable semipermeable membrane units to selectively remove desired amounts of both carbon dioxide and argon diluents from the reaction recycle gas. The utilization of such a process makes possible to utilize a much cheaper low purity oxygen source without concern for feed purge losses.

Abstract translation: 公开了用于生产环氧乙烷的改进方法; 该方法利用合适的半透膜单元从反应循环气体中选择性地除去所需量的二氧化碳和氩稀释剂。 利用这种方法使得可以利用更便宜的低纯度氧源，而不考虑进料清洗损失。

公开(公告)号：US4841080A

公开(公告)日：1989-06-20

申请号：US156212

申请日：1988-02-16

Applicant: William D. Armstrong

Inventor： William D. Armstrong

IPC: B01J23/66 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  C07D301/10

CPC classification number: C07D301/10 ,  B01J23/66 ,  B01J35/0026 ,  B01J35/023 ,  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 of 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，在选择的条件下活化银以提供环氧乙烷的最佳选择性，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：US4786741A

公开(公告)日：1988-11-22

申请号：US441191

申请日：1982-11-15

Applicant: Howard M. Sachs

Inventor： Howard M. Sachs

IPC: C07D319/06 ,  C07D321/00 ,  C07D317/12

CPC classification number: C07D321/00 ,  C07D319/06

Abstract: Alkylene carbonates, particularly ethylene carbonate, are prepared by the reaction of an alkylene oxide with carbon dioxide in the presence of a catalyst at temperatures ranging upwards from 20.degree. C., particularly temperatures above about 90.degree. C., preferably 90.degree.-170.degree. C. The conversion of alkylene oxide to alkylene carbonate can be carried out in the presence of water while minimizing the undesirable hydrolysis of the carbonate to the corresponding alkylene glycol and formation of higher glycols. This is achieved by maintaining the water to alkylene oxide molar ratio and the carbon dioxide to alkylene oxide ratio within the stated limits and adjusting the carbon dioxide partial pressure to provide the desired selectivity to alkylene carbonate.

Abstract translation: 碳酸亚烷基酯，特别是碳酸亚乙酯，通过烯化氧与二氧化碳的反应，在催化剂存在下，在高于20℃，特别是高于约90℃，优选90-170℃的温度下进行反应来制备。 烯化氧转化为碳酸亚烷基酯可以在水的存在下进行，同时最小化碳酸酯对相应的亚烷基二醇的不希望的水解和高级二醇的形成。 这通过将水保持为环氧烷摩尔比，并将二氧化碳与环氧烷的比例保持在规定的范围内并调节二氧化碳分压以提供对碳酸亚烷基酯所需的选择性来实现。

公开(公告)号：US4774222A

公开(公告)日：1988-09-27

申请号：US388865

申请日：1982-06-16

Applicant: Jay A. Rashkin

Inventor： Jay A. Rashkin

IPC: B01J23/66 ,  B01J37/08 ,  B01J37/14 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04 ,  B01J23/04 ,  B01J23/50

CPC classification number: C07D301/10 ,  B01J23/66 ,  Y02P20/52

Abstract: A supported silver catalyst selective to the formation of ethylene oxide in the reaction of ethylene with molecular oxygen is made by depositing an amount of an alkali metal sufficient to depress the activity and selectivity of the silver catalyst below that of its alkali-free state and thereafter heating the alkali metal-containing catalyst in a substantially oxygen-free atmosphere to reactivate it. In one embodiment, a large amount of alkali metal is deposited which removes substantially all activity from the silver catalyst and then activity and selectivity for oxidation of ethylene to ethylene oxide is recovered and enhanced by heating the catalyst in a nitrogen atmosphere to a temperature above 400.degree. C. for a sufficient period of time.

Abstract translation: 通过沉积一定量的足以将银催化剂的活性和选择性降低到其无碱状态的活性和选择性的碱金属，然后在乙烯与分子氧的反应中选择性地形成环氧乙烷的负载型银催化剂 在基本上无氧的气氛中加热含碱金属的催化剂以使其重新活化。 在一个实施方案中，沉积大量的碱金属，其从银催化剂中除去基本上所有的活性，然后通过在氮气气氛中将催化剂加热到高于400℃的温度来回收和增强乙烯氧化成环氧乙烷的活性和选择性 DEG C.充足的时间。

公开(公告)号：US20220289702A1

公开(公告)日：2022-09-15

申请号：US17692822

申请日：2022-03-11

Applicant: Scientific Design Company, Inc.

Inventor： Mansoor Husain

IPC: C07D301/32

Abstract: A process for the preparation of ethylene oxide in which a conventional ethylene oxide process is modified by supplement with a second chiller and a tempered water system.

公开(公告)号：US10676401B2

公开(公告)日：2020-06-09

申请号：US15960164

申请日：2018-04-23

Applicant: Scientific Design Company, Inc.

Inventor： Jean Adam ,  Michael Di Mare ,  Wojciech L. Suchanek

IPC: C04B38/06 ,  C04B41/00

Abstract: Oxalic acid is employed in a precursor mixture containing at least one milled alpha alumina powder having a particle size of 0.1 to 6 microns, boehmite powder that functions as a binder of the alpha alumina powders, and at least one burnout material having a particle size of 1-10 microns to provide a porous body having enhanced pore architecture in which extrusion cracks can be reduced. The presence of oxalic acid in such as precursor mixture can reduce and even eliminate NOx emission during a high temperature heat treatment process.

公开(公告)号：US10604497B2

公开(公告)日：2020-03-31

申请号：US15873125

申请日：2018-01-17

Applicant: SCIENTIFIC DESIGN COMPANY INC.

Inventor： Serguei Pak

IPC: C07D301/10 ,  B01J23/66 ,  C01G5/00

Abstract: A method for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide, the method comprising: (i) impregnating a porous refractory carrier with a sub-catalytic level of silver ion in a range of 0.1 wt % to 1 wt % of silver by weight of the carrier and silver, and at least partially reducing said silver ion to elemental silver to produce a low-silver catalyst precursor having isolated silver atoms or silver nanoparticles on surfaces of said refractory carrier; and (ii) further impregnating the low-silver catalyst precursor with a catalytic amount of silver ion of at least 10 wt % total amount of silver and at least one promoting species by weight of the carrier and silver, and subjecting the further impregnated carrier to an elevated temperature of at least 200° C. to completely reduce silver ion to elemental silver in the carrier. The low-silver catalyst precursor produced in step (i) is also described in detail. Methods for using the catalyst produced in step (ii) for the oxidative conversion of ethylene to ethylene oxide are also described.

公开(公告)号：US20190022628A1

公开(公告)日：2019-01-24

申请号：US16043296

申请日：2018-07-24

Applicant: Scientific Design Company, Inc.

Inventor： Serguei PAK ,  Andrew MCFARLAND

IPC: B01J23/68 ,  B01J21/04 ,  B01J35/00 ,  B01J37/02 ,  C07D301/03

Abstract: The present disclosure is directed to the preparation of silver-based HSCs. During preparation of the catalyst a selected carrier is co-impregnated with a solution containing a catalytically effective amount of silver and a promoting amount of rhenium and other promoters. After co-impregnation, the carrier is subjected to a separate heat treatment prior to calcination. Such heat treatment is conducted for between about 1 minute and about 120 minutes at temperatures between about 40° C. and about 300° C. Catalysts prepared by the present methodology evidence improved selectivity, activity and/or stability resulting in an increase in the useful life of the catalyst.

公开(公告)号：US20180326403A1

公开(公告)日：2018-11-15

申请号：US15834375

申请日：2017-12-07

Applicant: Scientific Design Company, Inc.

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

IPC: B01J23/68 ,  B01J21/04 ,  B01J21/12 ,  B01J23/66 ,  B01J35/00 ,  B01J35/10 ,  B01J37/00 ,  C07D301/10 ,  B01D71/02 ,  B01D53/22 ,  B01D53/86

CPC classification number: B01J23/688 ,  B01D53/22 ,  B01D53/86 ,  B01D63/066 ,  B01D69/10 ,  B01D71/022 ,  B01D71/025 ,  B01D2255/104 ,  B01J21/04 ,  B01J21/12 ,  B01J23/50 ,  B01J23/66 ,  B01J23/8986 ,  B01J35/0006 ,  B01J35/002 ,  B01J35/023 ,  B01J35/026 ,  B01J35/1009 ,  B01J35/1014 ,  B01J35/1038 ,  B01J35/1042 ,  B01J35/1047 ,  B01J35/1076 ,  B01J35/108 ,  B01J37/0018 ,  C07D301/10

Abstract: A porous body with enhanced fluid transport properties and crush strength is provided. The porous body includes the porous body includes at least 80 percent alpha alumina and having 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, wherein the porous body is a cylinder comprising at least two spaced apart holes that extend through an entire length of the cylinder. The porous body has a flat plate crush strength improved by more than 10% over a porous body cylinder having a same outer diameter and length, but having only a single hole.

公开(公告)号：US20180201595A1

公开(公告)日：2018-07-19

申请号：US15873125

申请日：2018-01-17

Applicant: SCIENTIFIC DESIGN COMPANY INC.

Inventor： Serguei PAK

IPC: C07D301/10 ,  B01J23/66 ,  C01G5/00

CPC classification number: C07D301/10 ,  B01J23/66 ,  C01G5/00 ,  C01P2004/03 ,  C01P2004/64 ,  Y02P20/52

Abstract: A method for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide, the method comprising: (i) impregnating a porous refractory carrier with a sub-catalytic level of silver ion in a range of 0.1 wt % to 1 wt % of silver by weight of the carrier and silver, and at least partially reducing said silver ion to elemental silver to produce a low-silver catalyst precursor having isolated silver atoms or silver nanoparticles on surfaces of said refractory carrier; and (ii) further impregnating the low-silver catalyst precursor with a catalytic amount of silver ion of at least 10 wt % total amount of silver and at least one promoting species by weight of the carrier and silver, and subjecting the further impregnated carrier to an elevated temperature of at least 200° C. to completely reduce silver ion to elemental silver in the carrier. The low-silver catalyst precursor produced in step (i) is also described in detail. Methods for using the catalyst produced in step (ii) for the oxidative conversion of ethylene to ethylene oxide are also described.