公开(公告)号：US20140187417A1

公开(公告)日：2014-07-03

申请号：US14144747

申请日：2013-12-31

Applicant: SCIENTIFIC DESIGN COMPANY, INC.

Inventor： Serguei Pak

IPC: B01J23/68

CPC classification number: B01J23/688 ,  B01J21/04 ,  B01J23/50 ,  B01J23/66 ,  B01J37/0203 ,  B01J37/0213 ,  B01J37/08 ,  B01J37/18 ,  C07D301/10 ,  Y02P20/52

Abstract: A method for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide, the method comprising subjecting a refractory carrier impregnated with a liquid silver-containing solution to a calcination process, wherein the calcination process comprises a solvent removal step in which the silver-impregnated carrier is heated to a base temperature (Tbase) of at least 80° C. and up to about 200° C. to produce a dry carrier impregnated with ionic silver, followed by a silver reduction step in which the dry carrier is gradually heated above the base temperature to a maximum temperature (Tmax) of at least 350° C. and up to about 500° C. and then gradually cooled to the base temperature, wherein the method is conducted such that (Tbase−Tmax)×HW is at least 2000 min.° C. wherein HW is a full width at half maximum of a temperature versus time curve delineated by the silver reduction step.

Abstract translation: 一种制备有效地将乙烯氧化成环氧乙烷的催化剂的方法，该方法包括使浸渍有含液体银的溶液的耐火材料载体进行煅烧过程，其中所述煅烧过程包括溶剂除去步骤，其中所述银 将浸渍的载体加热至至少80℃至高达约200℃的基础温度（Tbase），以产生用离子银浸渍的干燥载体，随后进行银还原步骤，其中干燥载体逐渐 在基础温度以上加热至最高温度（Tmax）至少350℃，最高约500℃，然后逐渐冷却至基体温度，其中进行方法为（Tbase-Tmax）×HW 是至少2000分钟。其中HW是通过银还原步骤描绘的温度对时间曲线的半峰全宽。

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.

公开(公告)号：US09975865B2

公开(公告)日：2018-05-22

申请号：US15651191

申请日：2017-07-17

Applicant: Scientific Design Company, Inc.

Inventor： Ashok S. Padia

IPC: C07D301/10 ,  C07D303/06 ,  B01J23/04 ,  B01J23/50 ,  C01D17/00

CPC classification number: C07D301/10 ,  B01J23/04 ,  B01J23/50 ,  C01D17/003 ,  C07D303/06

Abstract: A method for producing ethylene oxide comprising: a) providing one or more feed components, wherein the one or more feed components contains at least ethylene obtained by dehydrating ethanol; b) contacting the one or more feed components with an ethylene oxide catalyst bed disposed in a reactor tube, the ethylene oxide catalyst bed comprising: (1) an upstream ethylene oxide catalyst having a first cesium concentration and (2) a downstream ethylene oxide catalyst having a second cesium concentration, wherein the first cesium concentration is higher than the second cesium concentration.

公开(公告)号：US20180021755A1

公开(公告)日：2018-01-25

申请号：US15722696

申请日：2017-10-02

Applicant: Scientific Design Company, Inc.

Inventor： Wojciech L. Suchanek

IPC: B01J21/04 ,  B01J23/50 ,  C07D301/10 ,  C04B41/88 ,  C04B41/51 ,  C04B41/00 ,  C04B38/08 ,  B01J37/08 ,  B01J37/00 ,  B01J35/10 ,  B01J35/04 ,  C07D301/22 ,  C04B41/45 ,  C04B111/00

Abstract: A porous body is provided with enhanced fluid transport properties that is capable of performing or facilitating separations, or performing reactions and/or providing areas for such separations or reactions to take place. The porous body includes at least 80 percent alpha alumina and has a pore volume from 0.3 mL/g to 1.2 mL/g and a surface area from 0.3 m2/g to 3.0 m2/g. The porous body further includes a pore architecture that provides at least one of a tortuosity of 7.0 or less, a constriction of 4.0 or less and a permeability of 30 mdarcys or greater. The porous body can be used in a wide variety of applications such as, for example, as a filter, as a membrane or as a catalyst carrier.

公开(公告)号：US20180016248A1

公开(公告)日：2018-01-18

申请号：US15651191

申请日：2017-07-17

Applicant: Scientific Design Company, Inc.

Inventor： Ashok S. Padia

IPC: C07D301/10 ,  C01D17/00 ,  B01J23/50 ,  C07D303/06 ,  B01J23/04

CPC classification number: C07D301/10 ,  B01J23/04 ,  B01J23/50 ,  C01D17/003 ,  C07D303/06

Abstract: A method for producing ethylene oxide comprising: a) providing one or more feed components, wherein the one or more feed components contains at least ethylene obtained by dehydrating ethanol; b) contacting the one or more feed components with an ethylene oxide catalyst bed disposed in a reactor tube, the ethylene oxide catalyst bed comprising: (1) an upstream ethylene oxide catalyst having a first cesium concentration and (2) a downstream ethylene oxide catalyst having a second cesium concentration, wherein the first cesium concentration is higher than the second cesium concentration.