SG11201909056UA - Propene recovery by scrubbing with a solvent/water mixture - Google Patents

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 01 November 2018 (01.11.2018) WIPO I PCT omit VIII °nolo ommomi o1111 Il 1111111 ow (10) International Publication Number WO 2018/197234 Al (51) International Patent Classification: C07D 301/12 (2006.01) (21) International Application Number: PCT/EP2018/059516 (22) International Filing Date: 13 April 2018 (13.04.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 17167780.0 24 April 2017 (24.04.2017) EP (71) Applicant: BASF SE [DE/DE]; Carl-Bosch-Strasse 38, 67056 Ludwigshafen am Rhein (DE). (72) Inventors: WOERZ, Nicolai Tonio; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). MUELLER, Ulrich; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). PARVULESCU, Andrei-Nicolae; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). RIEDEL, Dominic; Carl- Bosch-Strasse 38, 67056 Ludwigshafen (DE). KRAMP, Marvin; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). URBANCZYK, Daniel; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). WEGERLE, Ulrike; St.-Boni- fatius-Str. 11, 67550 Worms (DE). MUELLER, Christian; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). MET- ZEN, Bernd; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). WEBER, Markus; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). (74) Agent: ALTMANN, Andreas; Herzog Fiesser & Partner Patentanwalte PartG mbB, Isartorplatz 1, 80331 Muenchen (DE). = (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). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(ii)) of inventorship (Rule 4.17(iv)) Published: — with international search report (Art. 21(3)) = (54) Title: PROPENE RECOVERY BY SCRUBBING WITH A SOLVENT/WATER MIXTURE (57) : The invention relates to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, propane, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided m (1) mto an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propane, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propene, propane, propylene oxide, water, and the organic solvent; (iv) separating propene and propane from the effluent stream by distillation, comprising subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous stream (S1) which is enriched in propene and propane compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream (S2) which is enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; (v) separating propane from the stream (S1) in a separation zone, comprising subjecting the stream (S1) to washing conditions in a scrubber, wherein a solvent mixture comprising organic solvent and water is added as entraining agent, obtaining a bottoms stream (S3), which comprises organic solvent, water and at least 70 weight-% of the propene comprised in (S1); and a gaseous top stream (S4), which comprises at least 5 weight-% of the propane comprised in stream (S1). N 00 O C