Patent SG-11201901652S-A (SG)
Title: Process for preparing an epoxidation catalyst
Inventor: SYED MOHMED A
IPC: C07D317/36
Filed: 2017-08-30
Abstract: coO co O C () INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 08 March 2018 (08.03.2018) WIPO I PCT olimion °nolo olo Ho Em im 11°111E11mo oimIE (10) International Publication Number WO 2018/044982 Al (51) International Patent Classification: B01J 37/02 (2006.01) C07D 317/36 (2006.01) B01J 23/50 (2006.01) CO 7C 213/04 (2006.01) BO1J 37/00 (2006.01) CO7C 215/08 (2006.01) CO7D 317/04 (2006.01) CO7D 301/10 (2006.01) (21) International Application Number: PCT/US2017/049287 (22) International Filing Date: 30 August 2017 (30.08.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/382,800 02 September 2016 (02.09.2016) US (71) Applicant: DOW TECHNOLOGY INVESTMENTS LLC [US/US]; 2020 Dow Center, Midland, MI 48674 (US). (72) Inventors: SPED, Mohmed A.; 2301 N. Brazosport Blvd., Freeport, TX 77541 (US). KULKARNI, Apoorva; 2301 N. Brazosport Blvd., Freeport, TX 77541 (US). SAN- TOS CASTRO, Vera P.; Herbert H. Dowweg 5, 4542NM Terneuzen (NL). SUSSMAN, Victor J.; 1776 Building, Midland, MI 48674 (US). MCKEEN, John C.; 1381 Build- ing, Midland, MI 48667 (US). TWAY, Cathy L.; 1776 Building, Midland, MI 48674 (US). TODD, Clifford S.; 1897 Building, Midland, MI 48667 (US). (74) Agent: HOPPE, James; The Dow Chemical Company, Intellectual Property, P.O. Box 1967, Midland, Michigan 48641-1967 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) (54) Title: PROCESS FOR PREPARING AN EPDXIDATION CATALYST (57) : A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e).