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1. (WO2018087214) OLEFIN POLYMERIZATION PROCESS IN A GAS-PHASE REACTOR COMPRISING A RISER UNIT AND A DOWNCOMER
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Pub. No.: WO/2018/087214 International Application No.: PCT/EP2017/078729
Publication Date: 17.05.2018 International Filing Date: 09.11.2017
IPC:
C08F 2/01 (2006.01) ,C08F 2/34 (2006.01) ,C08F 10/02 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2
Processes of polymerisation
01
characterised by special features of the polymerisation apparatus used
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2
Processes of polymerisation
34
Polymerisation in gaseous state
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
10
Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
02
Ethene
Applicants:
BASELL POLYOLEFINE GMBH [DE/DE]; Brühler Straße 60 50389 Wesseling, DE
Inventors:
MEIER, Gerhardus; DE
SCHUELLER, Ulf; DE
MEI, Gabriele; IT
COVEZZI, Massimo; IT
BAITA, Pietro; IT
MARTURANO, Lorella; IT
Agent:
SEELERT, Stefan; DE
Priority Data:
16198262.410.11.2016EP
17179386.203.07.2017EP
Title (EN) OLEFIN POLYMERIZATION PROCESS IN A GAS-PHASE REACTOR COMPRISING A RISER UNIT AND A DOWNCOMER
(FR) PROCÉDÉ DE POLYMÉRISATION D'OLÉFINES DANS UN RÉACTEUR EN PHASE GAZEUSE COMPRENANT UNE UNITÉ DE COLONNE MONTANTE ET UN DÉVERSOIR
Abstract:
(EN) A process for preparing an ethylene polymer comprising homopolymerizing ethylene or copolymerizing ethylene with one or more comonomers in a gas-phase polymerization reactor comprising a riser unit, in which growing polymer particles flow upwards under fluidization, fast fluidization or transport conditions, and a downcomer, in which growing polymer particles flow downward 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 of polymer particles in the gas-phase polymerization reactor.
(FR) L'invention concerne un procédé de préparation d'un polymère d'éthylène, comprenant l'homopolymérisation d'éthylène ou la copolymérisation d'éthylène avec un ou plusieurs comonomères dans un réacteur de polymérisation en phase gazeuse comprenant une unité de colonne montante, dans lequel des particules polymères en cours de croissance s'écoulent vers le haut dans les conditions d'une fluidisation, d'une fluidisation rapide ou d'un transport, et un déversoir, dans lequel les particules polymères en cours de croissance s'écoulent vers le bas sous une forme densifiée, la rétention des particules polymères dans le déversoir étant de 55 % en poids à 80 % en poids de la rétention totale des particules polymères dans le réacteur de polymérisation en phase gazeuse.
Designated States: 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)