SG11201804138RA - Process for withdrawing polyolefins - Google Patents

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property -' Organization International Bureau ires.. 00) (43) International Publication Date .... ....r .....) 29 June 2017(29.06.2017) WIPO I PCT (10) WO International 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 2017/108909 Publication Al Number (51) International Patent Classification: (74) Agent: KADOR & PARTNER; Corneliusstr. 15, 80469 CO8F 6/00 (2006.01) C08F 6/12 (2006.01) Milnchen (DE). (21) International Application Number: (81) Designated States (unless otherwise indicated, for every PCT/EP2016/082113 kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (22) International Filing Date: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, 21 December 2016 (21.12.2016) DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, (25) Filing Language: English HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, (26) Publication Language: English MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, (30) Priority Data: NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, 15003631.7 21 December 2015 (21.12.2015) EP 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, (71) Applicant: BOREALIS AG [AT/AT]; Wagramer Str. 17- ZA, ZM, ZW. 19, IZD Tower, 1220 Wien (AT). (84) Designated States (unless otherwise indicated, for every (72) Inventors: AL-HAJ ALI, Mohammad; Malmin Kaup- kind of regional protection available): ARIPO (BW, GH, patie 4a A2, 00700 Helsinki (FI). ERIKSSON, Erik; GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, Traclgardsvagen 17, SE-444 54 Stenungsund (SE). VIJAY, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, Sameer; LastenstraBe 13/233, AT-4020 Linz (AT). TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, MATHIVANAN, Guhan; Rosenbauerstrasse 13, 4020 DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, Linz (AT). RASANEN, Jukka; Mustikkapolku 2, FIN- LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, 06100 Porvoo (FI). SLEIJSTER, Henry; Lindestraat 4A, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, 6101ES Echt (NL). WURNITSCH, Christof; LinzerstraBe GW, KM, ML, MR, NE, SN, TD, TG). 15, 4120 Neufelden ZITTING, (AT). Samuli; Vana- Published: 7, 04300 Tuusula monkuja (FI). — with international search report (Art 21(3)) (54) Title: PROCESS FOR WITHDRAWING POLYOLEFINS (57) : A process for withdrawing polyolefins from a reactor solution polymerization comprising: providing - a low pressure separator 1, - a washing column 2, - a withdrawal line 3 connecting the upper part a 14 13 of the low pressure separator and the washing column - a condenser 4, - a condenser-line 5 connecting the top part of the washing column and the condenser - optionally a (---= 6 3 recycle solvent vessel - optionally a solvent-vessel-line 7 connecting the condenser with the recycle solvent yes- 7 6 A - a reflux line 8 the and the sel connecting condenser up- - s per part of the washing column or connecting the recycle 4------ . solvent vessel and the upper part of the washing column - optionally a circulation line 9 fluidly connected to the 12 8 1 10 11 middle part of the washing column and recycling line 10 - a recycling line 10 connecting the bottom of the wash- ing column and the upper part of the low pressure separ- ator, - optionally a wash recycle heater 11 embedded into 1-1 the recycling line 10 - optionally a heater 12 embedded .4t into the circulation line 9 (a) continuously withdrawing a Ct FIG 1 liquid solution stream from the solution polymerization 0 reactor and passing said liquid solution stream into the 01 first low pressure separator 1; (b) withdrawing a first va- GC pour stream and a first liquid stream from the low pres - 0 sure separator and passing said first vapour stream via 1-1 --..„ withdrawal line 3 into the washing column (c) withdraw- ing a second vapour stream from the washing column 1-1 c:::, and feeding it via condenser line 5 to condenser 4 (d) cooling the second vapour stream in condenser 4 so that a part of the second ei vapour stream condenses thereby producing a condensed second vapour stream and an uncondensed second vapour stream (e) c passing the condensed second vapour stream to the upper part of the washing column via reflux line 8 (f) withdrawing a second li- quid stream from the washing column and passing at least a part of the second liquid stream to the low pressure separator via recyc - ling line 10 (g) recovering heat from the condenser