Patent SG-11201811103Q-A (SG)
Title: Process for the production of acetic acid
Inventor: HENNIGAN SEAN ANTHONY
IPC: C07C51/12
Filed: 2017-06-08
Abstract: XX x X X A • A X • A • X • • I. • • • n I II * • • • I • • • • • 210 208 198 196 Residence Time (s) • 24.6 M31.3 A 38.02 X 44.72 206 Temp era tu re a t F las h ( °C) 204 202 200 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 21 December 2017 (21.12.2017) WIP0 I PCT omit VIII Hot o III OH VIII 100 001010 Immo oimIE (10) International Publication Number WO 2017/216024 Al (51) International Patent Classification: CO7C 51/12 (2006.01) (21) International Application Number: PCT/EP2017/063925 (22) International Filing Date: 08 June 2017 (08.06.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 1610338.4 14 June 2016 (14.06.2016) GB (71) Applicant: BP CHEMICALS LIMITED [GB/GB]; Chertsey Road, Sunbury-on-Thames Middlesex TW16 7BP (GB). (72) Inventor: HENNIGAN, Sean Anthony; Saltend, Hedon, Hull East Yorkshire HU12 8DS (GB). (74) Agent: HILL, Simon Stephen; BP INTERNATIONAL LIMITED, Global Patents & Technology Law, Chertsey Road, Sunbury on Thames Middlesex TW16 7LN (GB). (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, 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. (54) Title: PROCESS FOR THE PRODUCTION OF ACETIC ACID 0 2 4 6 10 12 14 16 Figure 2 Gas Flow (kg/te) (57) : A process for the production of acetic acid which process comprises the steps of. (a) introducing methanol and/or a reactive derivative thereof and carbon monoxide into a first reaction zone containing a liquid reaction composition comprising a car- bonylation catalyst, optionally a carbonylation catalyst promoter, methyl iodide, methyl acetate, acetic acid and water; (b) withdrawing at least a portion of the liquid reaction composition from the first reaction zone; (c) passing at least a portion of the withdrawn liquid reaction composition to a second reaction zone, wherein a gas feed comprising carbon monoxide is added to the liquid reaction com- position withdrawn from the first reaction zone at one or more points upstream of the second reaction zone, one or more points within the second reaction zone, or a combination of one or more points upstream of the second [Continued on next page] WO 2017/216024 Al MIDEDIMOMOIDEIRMEM00110HINIMMHEMOVH (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)) reaction zone and one or more points within the second reaction zone; and (d) passing at least a portion of the liquid reaction composition from the second reaction zone into a flash separation zone to form: a vapour fraction, which comprises acetic acid, methyl iodide, methyl acetate and low pressure off-gas; and, a liquid fraction, which comprises carbonylation catalyst and optional carbonylation catalyst promoter; wherein the flow rate in kg of gas feed comprising carbon monoxide which is added to the second reaction zone per tonne of liquid reaction composition being passed to the flash separation zone (kg/te), is in the range of from 0.5F G to 1.2F G , wherein FG is defined according to equation 1: (1) FG=(0.296086962xt, )+(0.369636xR )+(0.295878701xGp R 0,8134 )- 23.3448 wherein, t r is the residence time (seconds) of the liquid reaction composition within the second reaction zone which is calculated using equation 2: (2) t r =V2/Ff wherein, V2 is the volume of the second reaction zone (m 3 ) and F f is the volumetric flow rate of liquid reaction composition to the flash separation zone (m 3 Is), R R is the reaction rate of the liquid reaction composition passed to the second reaction zone at the temperature at which it is withdrawn from the first reaction zone (mol/litre/hour), and G is the purity of the gas feed comprising p carbon monoxide which is added to the second reaction zone expressed as the mass fraction of carbon monoxide in the gas feed.