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1. (WO2001002332) PROCESS FOR THE PREPARATION OF 3,3-DIMETHYLBUTANAL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2001/002332    International Application No.:    PCT/US2000/017946
Publication Date: 11.01.2001 International Filing Date: 29.06.2000
Chapter 2 Demand Filed:    18.01.2001    
IPC:
C07C 17/275 (2006.01), C07C 29/09 (2006.01), C07C 29/12 (2006.01), C07C 29/124 (2006.01), C07C 29/132 (2006.01), C07C 29/147 (2006.01), C07C 45/00 (2006.01), C07C 45/38 (2006.01), C07C 47/02 (2006.01), C07C 229/24 (2006.01), C07C 303/24 (2006.01), C07C 305/08 (2006.01), C07K 5/072 (2006.01)
Applicants: THE NUTRASWEET COMPANY [US/US]; 601 East Kensington, Mt. Prospect, IL 60056 (US)
Inventors: EBNER, Jerry, R.; (US).
GUO, Zhi; (US).
HERSHMAN, Arnold; (US).
KLEIN, Loraine, M.; (US).
MCGHEE, William, D.; (US).
PASTER, Mark, D.; (US).
PRAKASH, Indra; (US)
Agent: ROEDEL, John, K., Jr.; Senniger, Powers, Leavitt & Roedel, 16th floor, One Metropolitan Square, St. Louis, MO 63102 (US)
Priority Data:
60/142,122 02.07.1999 US
09/575,107 19.05.2000 US
Title (EN) PROCESS FOR THE PREPARATION OF 3,3-DIMETHYLBUTANAL
(FR) PREPARATION DE 3,3-DIMETHYLBUTANAL
Abstract: front page image
(EN)3,3-Dimethylbutanal is prepared from 3,3-dimethylbutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and a mineral acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hydrolysis step is effectively carried out by reactive distillation. Alternatively, 3,3-dimethylbutanal is prepared from 3,3-dimethylbutanol obtained by reduction of the corresponding carboxylic acid or 1,2-epoxy-3,3-dimethylbutane, or by hydrolysis of 1-halo-3,3-dimethylbutane. Fixed bed gas phase and stirred tank liquid phase processes are provided for converting 3,3-dimethylbutanol to 3,3-dimethylbutanal by catalytic dehydrogenation.
(FR)Le 3,3-diméthylbutanal se prépare à partir de 3,3-diméthylbutanol. Le 3,3-diméthylbutanol intermédiaire est issu d'une réaction d'éthylène, d'isopropylène et d'un acide minéral, d'où la production d'un ester de 3,3-diméthylbutyle que l'on hydrolyse en alcool. On procède à une hydrolyse effective par distillation réactive. Dans un autre mode de réalisation, le 3,3-diméthylbutanal se prépare à partir de 3,3-diméthylbutanol obtenu par réduction d'un acide carboxylique correspondant ou de 1,2-époxy-3,3-diméthylbutane, ou par hydrolyse de 1-halo-3,3-diméthylbutane. L'invention concerne des procédés de phase gazeuse à lit fixe et de phase liquide en cuve à agitation destinés à convertir le 3,3-diméthylbutanol en 3,3-diméthylbutanal par déshydrogénation catalytique.
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, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
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)