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Title:
METHOD FOR PREPARING AN UNSATURATED CARBOXYLIC ACID
Document Type and Number:
WIPO Patent Application WO2004000763
Kind Code:
A3
Abstract:
The invention concerns a method for preparing an unsaturated carboxylic acid from the corresponding aldehyde. More particularly, the invention aims at preparing an aliphatic carboxylic acid having at least an unsaturation conjugated with the carbonyl group. In particular, the invention concerns the preparation of geranic acid. The invention relates to a method for preparing an unsaturated carboxylic acid from the corresponding aldehyde. Said method is characterized in that it comprises a step which consists in oxidizing said aldehyde, in controlled basic medium and using molecular oxygen or a gas containing same, in the presence of a catalyst based on palladium and/or platinum and an activator based on bismuth, in conditions such that the oxidizing is carried out by diffusion process.

Inventors:
JACQUOT ROLAND (FR)
Application Number:
PCT/FR2003/001856
Publication Date:
April 08, 2004
Filing Date:
June 18, 2003
Export Citation:
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Assignee:
RHODIA CHIMIE SA (FR)
JACQUOT ROLAND (FR)
International Classes:
C07C51/235; C07C57/00; C07C57/03; C07C61/00; C07C63/00; C07C; (IPC1-7): C07C51/235; C07C57/00; C07C61/00; C07C63/00
Foreign References:
US5783737A1998-07-21
Other References:
CROZON, A-B: "Oxidation of 9-decen-1-ol (rosalva) by air in aqueous media on platinum catalysts", NEW JOURNAL OF CHEMISTRY, 1998, pages 269 - 273, XP008012590
DATABASE WPI Section Ch Week 199749, Derwent World Patents Index; Class E14, AN 1997-532733, XP002187501
DATABASE WPI Section Ch Week 197710, Derwent World Patents Index; Class E14, AN 1977-17155Y, XP002187502
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