Patent SG-11201804741T-A (SG)
Title: Process for purification of methyl methacrylate
Inventor: WORLEY WILLIAM G
IPC: C07C69/54
Filed: 2016-12-08
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property -' Organization International Bureau (43) International Publication Date .... ....r .„,„1 22 June 2017(22.06.2017) WIPO I PCT II (10) 11111111111111111111111 WO International EOM 2017/105977 Publication 111111111111111111111111RIIIIIIIIIIIIIII Al Number (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every CO7C 67/54 (2006.01) CO7C 6 9 / 5 4 (2006.01) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (21) International Application Number: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, PCT/US2016/065490 DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, (22) International Filing Date: HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, 8 December 2016 (08.12.2016) KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, (25) Filing Language: English NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, (26) Publication Language: English 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, (30) Priority Data: ZA, ZM, ZW. 62/269,461 18 December 2015 (18.12.2015) US (84) Designated States (unless otherwise indicated, for every (71) Applicants: ROHM AND HAAS COMPANY [US/US]; kind of regional protection available): ARIPO (BW, GH, 100 Independence Mall West, Philadelphia, PA 19106 GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, (US). DOW GLOBAL TECHNOLOGIES LLC TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, [US/US]; 2040 Dow Center, Midland, MI 48674 (US). TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, (72) Inventors: WORLEY, William G.; 1900 Tidal Road, 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, Deer Park, TX 77536 (US). HOY, Stacy W.; 1254 En- SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, clave Parkway, Suite 2901-B3, Houston, TX 77077 (US). GW, KM, ML, MR, NE, SN, TD, TG). (74) Agent: CRIMALDI, Kenneth; Dow Global Technologies Published: LLC, 2040 Dow Center, Midland, Michigan 48674 (US). 21(3)) — with international search report (Art (54) Title: PROCESS FOR PURIFICATION OF METHYL METHACRYLATE (57) : A process for purifying methyl Figure 1 methacrylate by (a) feeding a mixture com- e 4 prising methyl methacrylate and its alkali salt c9 into a distillation column above the middle along with a hydrocarbon; (b) removing a first overhead stream; (c) removing a first 1 s bottoms stream; (d) feeding first the overhead stream to a first water separator to produce (i) a first organic phase and (ii) a first aqueous drying column phase which enters a methanol o T which produces a second overhead stream and a second bottoms stream; (e) feeding the 16 first bottoms stream to a second water separ- 12 H H J ator to produce (i) a second aqueous phase 17 which is fed to an MMA stripper column 19 E which produces a third overhead stream and a tz --L- 13 11 e third bottoms stream, and (ii) a second organ- 1-1 is phase; (f) combining the second organic and the second bottoms stream into a phase .4t IN I IN third water separator which produces a third organic phase which enters an MMA drying K column which produces a fourth bottoms 0 \ un -r 15 ( ---s tr- 18 --F-- 20 stream, and (g) feeding the fourth bottoms 0. 0 . J ► stream to an MMA product column. 1-1 IN 1-1 0 ei O