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1. (WO2005068408) METHODS FOR PREPARING 1,3-BUTYLENE GLYCOL
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2005/068408 International Application No.: PCT/US2005/000047
Publication Date: 28.07.2005 International Filing Date: 03.01.2005
Chapter 2 Demand Filed: 08.08.2005
IPC:
C07C 29/141 (2006.01) ,C07C 45/72 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
29
Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
132
by reduction of an oxygen-containing functional group
136
of CO containing groups, e.g. -COOH
14
of a -CHO group
141
with hydrogen or hydrogen-containing gases
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
45
Preparation of compounds having CO groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
61
by reactions not involving the formation of CO groups
67
by isomerisation; by change of size of the carbon skeleton
68
by increase in the number of carbon atoms
72
by reaction of compounds containing CO groups with the same or other compounds containing CO groups
Applicants:
CELANESE INTERNATIONAL CORPORATION [US/US]; 1601 West LBJ Freeway Dallas, TX 75234, US
Inventors:
WINDHORST, Kenneth, Allen; US
GUAJARDO, Richard, D.; US
Agent:
SPIERING, Susan, M. ; c/o Celanese Ltd. IP Legal Dept. IZIP 701 P.O. Box 428 Highway 77 South Bishop, TX 78343, US
Priority Data:
10/753,74508.01.2004US
Title (EN) METHODS FOR PREPARING 1,3-BUTYLENE GLYCOL
(FR) PROCEDES DE PREPARATION DE 1,3-BUTYLENE GLYCOL
Abstract:
(EN) 1,3 butylene glycol, prepared through an intermediate aldol condensation reaction of acetaldehyde, is produced at increased yield efficiencies. The efficiencies are achieved by utilizing an acetaldehyde having low carboxylic concentrations. The aldol condensation takes place in the presence of an alkali agent at a concentration of about 2 ppm to about 10 ppm to produce a 3-hydroxybutanal intermediate product that is hydrogenated in the presence of a Raney nickel catalyst to yield 1,3 butylene glycol at efficiency yields of greater than about 75%.
(FR) L'invention concerne du 1,3 butylène glycol, préparé par le biais d'une réaction de condensation d'aldol intermédiaire d'acétaldéhyde, produit avec des économies de rendement amélioré. Les économies sont réalisées par utilisation d'un acétaldéhyde possédant de faibles concentrations carboxyliques. La condensation d'aldol s'effectue en présence d'un agent alcalin à une concentration d'environ 2 ppm à environ 10 ppm afin de produire un produit intermédiaire de 3-hydroxybutanal qui est hydrogéné en présence d'un catalyseur de nickel de Raney afin de produire du 1,3 butylène glycol à un rendement supérieur à environ 75 %.
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, 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, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, 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 Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, 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: English (EN)
Filing Language: English (EN)