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1. (WO2001038283) PURIFICATION OF AQUEOUS SOLUTIONS OF ORGANIC ACIDS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/038283 International Application No.: PCT/NL2000/000865
Publication Date: 31.05.2001 International Filing Date: 27.11.2000
Chapter 2 Demand Filed: 26.06.2001
IPC:
C07C 51/44 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
51
Preparation of carboxylic acids or their salts, halides, or anhydrides
42
Separation; Purification; Stabilisation; Use of additives
43
by change of the physical state, e.g. crystallisation
44
by distillation
Applicants:
WINKELAAR, Hendrik, Martinus [NL/NL]; NL (UsOnly)
VAN BREUGEL, Jan [NL/NL]; NL (UsOnly)
CAMPRUBI VILA, Margarita [ES/ES]; ES (UsOnly)
VIDAL LANCIS, Jose Maria [ES/ES]; ES (UsOnly)
PURAC BIOCHEM B.V. [NL/NL]; P.O. Box 21 NL-4200 AA Gorinchem, NL (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CR, CU, CY, CZ, DE, DK, DM, DZ, EE, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW)
Inventors:
WINKELAAR, Hendrik, Martinus; NL
VAN BREUGEL, Jan; NL
CAMPRUBI VILA, Margarita; ES
VIDAL LANCIS, Jose Maria; ES
Agent:
JORRITSMA, Ruurd; Nederlandsch Octrooibureau Scheveningseweg 82 P.O. Box 29720 NL-2502 LS The Hague, NL
Priority Data:
101368226.11.1999NL
Title (EN) PURIFICATION OF AQUEOUS SOLUTIONS OF ORGANIC ACIDS
(FR) PURIFICATION DE SOLUTIONS AQUEUSES D'ACIDES ORGANIQUES
Abstract:
(EN) The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450 °C, which comprises approximately 275 g carboxylate ions/l or less, preferably 250 g carboxylate ions/l or less, and preferably less than 1 % by weight ionic impurities, calculated on the basis of the total solution, and in particular to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450 °C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80° to 150 °C and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80° to 200 °C and a pressure of from 0.01 to 50 mbar.
(FR) La présente invention concerne un procédé et un dispositif de purification d'une solution aqueuse d'acide organique présentant un point d'ébullition à la pression atmosphérique inférieur à 450 °C, et contenant environ 275 g d'ions carboxylate/I ou moins, de préférence 250 g d'ions carboxylate/I ou moins, et de préférence moins de 1 % en poids d'impuretés ioniques, calculées sur la base de la solution totale. Cette invention concerne plus particulièrement un procédé et un dispositif de purification et de concentration continues, à l'échelle industrielle, d'une solution aqueuse d'acide organique présentant un point d'ébullition à la pression atmosphérique inférieur à 450 °C. Selon cette invention, on soumet cette solution à deux ou plusieurs opérations de distillation. La première opération est exécutée à une température comprise entre 0° et 150 °C et à une pression comprise entre 50 et 250 mbar, alors que la seconde est exécutée à une température comprise entre 80° et 200 °C et à une pression comprise entre 0,01 et 50 mbar.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)