Patent SG-11201909640W-A (SG)
Title: Process for purifying alkanesulfonic anhydride and process for producing alkanesulfonic acid using the purified alkanesulfonic anhydride
Inventor: WORTMANN JUERGEN
IPC: C07C303/44
Filed: 2018-04-18
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 25 October 2018 (25.10.2018) WIPO I PCT onion °nolo moiciolomim voimiflo (10) International Publication Number WO 2018/192954 Al (51) International Patent Classification: C07C 303/44 (2006.01) C07C 309/00 (2006.01) (21) International Application Number: PCT/EP2018/059864 (22) International Filing Date: 18 April 2018 (18.04.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 17166872.6 18 Apri12017 (18.04.2017) EP (71) Applicant: BASF SE [DE/DE]; Carl-Bosch-Str. 38, 67056 Ludwigshafen am Rhein (DE). (72) Inventors: WORTMANN, Juergen; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). SPIELMANN, Jan; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). FED- ERSEL, Katharina; Carl-Bosch-Strasse 38, 67056 Lud- wigshafen (DE). RUETHER, Feelly; Carl-Bosch-Strasse 38, 67056 Ludwigshafen (DE). (74) Agent: KUDLA, Karsten; Isenbruck Bosl Horschler LLP Patentanwalte, EASTSITE ONE, Seckenheimer LandstraBe 4, 68163 Mannheim (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, = (54) Title: PROCESS FOR PURIFYING ALKANESULFONIC ANHYDRIDE AND PROCESS FOR PRODUCING ALKANESUL- FONIC ACID USING THE PURIFIED ALKANESULFONIC ANHYDRIDE Fig. 1 00 O C (57) : The invention relates to a process for purifying alkanesulfonic anhydride which comprises the following steps of: (a) feeding a stream comprising alkanesulfonic anhydride, sulfuric acid, high boilers and residual low boilers into a melt crystallization (25) to form crystals of the alkanesulfonic anhydride suspended in mother liquor, (b) performing a solid-liquid separation to remove the crystals from the mother liquor, (c) optionally washing the crystals to remove mother liquor adhering to the crystals. The invention further relates to processes for producing alkanesulfonic acid using the purified alkanesulfonic anhydride. [Continued on next page] WO 2018/192954 Al O III 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))