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Machine translation
1. (WO1996008459) PROCESS FOR RECOVERING CITRIC ACID
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1996/008459    International Application No.:    PCT/US1995/012160
Publication Date: 21.03.1996 International Filing Date: 12.09.1995
Chapter 2 Demand Filed:    04.04.1996    
IPC:
C07C 51/42 (2006.01)
Applicants: AECI LIMITED [ZA/ZA]; Office Tower, Carlton Center, 16th floor, Commissioner Street, Johannesburg 2000 (ZA) (For All Designated States Except US).
USTECH INC. [US/US]; 951 Stevens Creek Circle, Decatur, IL 62526 (US) (For All Designated States Except US).
VERHOFF, Francis, H. [US/US]; (US) (For US Only).
GROND, Sanet [ZA/ZA]; (ZA) (For US Only).
HENDRICKS, Fadl [ZA/ZA]; (ZA) (For US Only).
RAMAN, Lakshminarayanan, Pattabiraman [IN/US]; (US) (For US Only)
Inventors: VERHOFF, Francis, H.; (US).
GROND, Sanet; (ZA).
HENDRICKS, Fadl; (ZA).
RAMAN, Lakshminarayanan, Pattabiraman; (US)
Agent: GREENLEE, Lorance, L.; Greenlee and Winner, P.C., Suite 201, 5370 Manhattan Circle, Boulder, CO 80303 (US)
Priority Data:
94/7011 12.09.1994 ZA
Title (EN) PROCESS FOR RECOVERING CITRIC ACID
(FR) PROCEDE POUR RECUPERER L'ACIDE CITRIQUE
Abstract: front page image
(EN)A process for treating a liquid comprising subjecting a liquid containing, in solution, citric acid as well as a less desirable component having a similar molecular weight to citric acid, to nanofiltration in a filtration step. From the filtration step, a permeate in which the ratio of the concentration of the citric acid to that of the less desirable component is greater than the ratio of the concentration of the citric acid to that of the less desirable component in the solution, is obtained.
(FR)L'invention concerne un procédé pour traiter un liquide consistant à soumettre un liquide contenant en solution de l'acide citrique, ainsi qu'un composé moins utile ayant un poids moléculaire similaire à celui de l'acide citrique, à une nanofiltration pendant une étape de filtration. Dans l'étape de filtration, on obtient un perméat où le rapport de la concentration en acide citrique sur celle dudit composé moins utile est plus élevé que le rapport de la concentration en acide citrique sur celle dudit composé moins utile, dans la solution.
Designated States: AM, AT, AU, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TT, UA, UG, US, UZ, VN.
African Regional Intellectual Property Organization (KE, MW, SD, SZ, UG)
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)