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1. (WO2007009970) METHOD FOR EXTRACTING LACTIC ACID FROM AQUEOUS SUSPENSIONS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/009970 International Application No.: PCT/EP2006/064324
Publication Date: 25.01.2007 International Filing Date: 17.07.2006
IPC:
C07C 51/48 (2006.01) ,C07C 59/08 (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
48
by liquid-liquid treatment
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
59
Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O-metal, -CHO, keto, ether, groups, groups, or groups
01
Saturated compounds having only one carboxyl group and containing hydroxy or O-metal groups
08
Lactic acid
Applicants:
BASF AKTIENGESELLSCHAFT [DE/DE]; 67056 Ludwigshafen, DE (AllExceptUS)
LEBKÜCHER, Helmut [DE/DE]; DE (UsOnly)
REISSENWEBER, Gernot [DE/DE]; DE (UsOnly)
Inventors:
LEBKÜCHER, Helmut; DE
REISSENWEBER, Gernot; DE
Agent:
REITSTÖTTER, KINZEBACH & PARTNER; Ludwigsplatz 4 67059 Ludwigshafen, DE
Priority Data:
10 2005 033 432.618.07.2005DE
Title (DE) VERFAHREN ZUR EXTRAKTION VON MILCHSÄURE AUS WÄSSRIGEN SUSPENSIONEN
(EN) METHOD FOR EXTRACTING LACTIC ACID FROM AQUEOUS SUSPENSIONS
(FR) PROCEDE D'EXTRACTION D'ACIDE LACTIQUE DANS DES SUSPENSIONS AQUEUSES
Abstract:
(DE) Die vorliegende Erfindung betrifft ein Verfahren zur kontinuierlichen Extraktion von Milchsäure aus einer feststoffhaltigen wässrigen Suspension, bei dem man die feststoffhaltige wässrige Suspension in einer mit Füllkörpern versehenen Kolonne, wobei die Oberflächen der Füllkörper aus hydrophobem Material bestehen, im Gegenstrom mit einem mit Wasser nicht vollständig mischbaren organischen Lösungsmittel unter Ausbildung einer wässrigen und einer organischen Phase so in Kontakt bringt, dass die organische Phase in einem Abschnitt der Kolonne, der Füllkörper umfasst, als disperse Phase geführt wird.
(EN) The invention relates to a method for the continuous extraction of lactic acid from an aqueous suspension containing solids. According to said method, the aqueous suspension containing solids is brought into contact, in a counter-current, with an organic solvent that is partially miscible with water, in a column provided with filling agents which have a surface consisting of a hydrophobic material, in such a way as to form an aqueous phase and an organic phase, such that the organic phase is guided as a dispersed phase in a section of the column comprising filling agents.
(FR) La présente invention concerne un procédé d'extraction continue d'acide lactique dans une suspension aqueuse contenant des substances solides. Ce procédé consiste à mettre ladite suspension en contact à contre-courant avec un solvant organique pas complètement miscible avec l'eau dans une colonne à corps de remplissage, les surfaces des corps de remplissage étant constituées d'un matériau hydrophobe, de façon à former une phase aqueuse et une phase organique de telle sorte que la phase organique soit guidée sous forme de phase dispersée dans une section de la colonne comprenant des corps de remplissage.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
KR1020080025738IL188356EP1907346JP2009501762US20080230480BRPI0613445
CN101223125DK1907346AU2006271693IN78/KOLNP/2008