公开(公告)号：US20180186759A1

公开(公告)日：2018-07-05

申请号：US15689758

申请日：2017-08-29

Applicant: SCIENTIFIC DESIGN COMPANY, INC. ,  Noritake Co., Limited

Inventor： Serguei PAK ,  Yasuyuki KATO

IPC: C07D301/10 ,  B01J23/66 ,  B01J21/12 ,  B01J21/08

CPC classification number: C07D301/10 ,  B01J21/08 ,  B01J21/12 ,  B01J23/50 ,  B01J23/58 ,  B01J23/66 ,  B01J23/688 ,  Y02P20/52

Abstract: A carrier for an ethylene epoxidation catalyst, the carrier comprising a porous alumina body formed of sintered particles of alumina in a substantial absence of inorganic binder species other than alumina, wherein the substantial absence of inorganic binder species corresponds to an amount of less than 0.6 wt % inorganic binder species other than alumina and comprises at least a substantial absence of silicon-containing species.

公开(公告)号：US20190127341A1

公开(公告)日：2019-05-02

申请号：US16225147

申请日：2018-12-19

Applicant: SCIENTIFIC DESIGN COMPANY, INC. ,  Noritake Co., Limited

Inventor： Serguei PAK ,  Yasuyuki KATO

IPC: C07D301/10 ,  B01J21/08 ,  B01J21/12 ,  B01J23/66

Abstract: A carrier for an ethylene epoxidation catalyst, the carrier comprising a porous alumina body formed of sintered particles of alumina in a substantial absence of inorganic binder species other than alumina, wherein the substantial absence of inorganic binder species corresponds to an amount of less than 0.6 wt % inorganic binder species other than alumina and comprises at least a substantial absence of silicon-containing species.

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：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.