Patent SG-11201903559Y-A (SG)
Title: Olefin polymerization process in a gas-phase reactor comprising a riser unit and a downcomer
Inventor: MEIER GERHARDUS
IPC: C08F2/01
Filed: 2017-11-09
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property 111111101111011101 HIM 011010011111111111111111111111111111111111111111111111 Organization International Bureau (10) International Publication Number (43) International Publication Date ......0\"\" WO 2018/087214 Al 17 May 2018 (17.05.2018) WIPO I PCT (51) International Patent Classification: MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, C08F 2/01 (2006.01) CO8F 10/02 (2006.01) TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, C08F 2/34 (2006.01) KM, ML, MR, NE, SN, TD, TG). (21) International Application Number: PCT/EP2017/078729 Published: — with international search report (Art. 21(3)) (22) International Filing Date: 09 November 2017 (09.11.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 16198262.4 10 November 2016 (10.11.2016) EP 17179386.2 03 July 2017 (03.07.2017) EP (71) Applicant: BASELL POLYOLEFINE GMBH [DE/DE]; Briihler StraBe 60, 50389 Wesseling (DE). (72) Inventors: MEIER, Gerhardus; Eichendorffstrasse 3, 60320 Frankfurt (DE). SCHUELLER, Ulf; Anne-Frank- Strasse 12, 64331 Weiterstadt (DE). MEI, Gabriele; C/O Basell Poliolefme Italia S.r.1., P.le G. Donegani, 12, 44122 Ferrara (IT). COVEZZI, Massimo; C/O Basell Poliole- fme Italia S.r.1., P.le G. Donegani, 12, 44122 Ferrara (IT). BAITA, Pietro; C/O Basell Poliolefme Italia S.r.1., P.le G. Donegani, 12, 44122 Ferrara (IT). MARTURANO, Lorel- la; C/O Basell Poliolefme Italia S.r.1., P.le G. Donegani, 12, 44122 Ferrara (IT). Agent: SEELERT, Stefan; Industriepark Hoechst, C657, 65926 Frankfurt (DE). _ (74) = (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. 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, (84) 1-1 .4 EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, 71' 1-1 IN el (54) Title: OLEFIN POLYMERIZATION PROCESS IN A GAS-PHASE REACTOR COMPRISING A RISER UNIT AND A pc DOWNCOMER ---- (57) : A process for preparing an ethylene polymer comprising homopolymerizing ethylene or copolymerizing ethylene with GC 1-1 one or more comonomers in a gas-phase polymerization reactor comprising a riser unit, in which growing polymer particles flow up- © wards under fluidization, fast fluidization or transport conditions, and a downcomer, in which growing polymer particles flow down- e• 1 ward in a densified form, wherein the hold-up of polymer particles in the downcomer is from 55 wt.% to 80 wt.% of the total hold-up 0 of polymer particles in the gas-phase polymerization reactor.