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US 2006/0135820 A1Published application
Selective liquid phase oxidation of toluene to benzaldehyde
AssigneeCouncil of Scientific and Industrial Research
InventorsRaghunath Chaudhari, Vilas Rane, Amit Deshmukh, Sunil Divekar
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Abstract
The present invention provides an improved process for the liquid phase oxidation of toluene to benzaldehyde with high selectivity and good activity in an organic acid medium using a catalyst system consisting of transition metal/metals and bromide as a promoter in the presence of lean oxygen.
Claims29
A process for the preparation of benzaldehyde comprising:
- (i) subjecting toluene to liquid phase oxidation in a reaction mixture comprising:
- (a) an organic solvent;
- (b) a catalyst system comprising at least one transition metal and a bromide promoter;
- and
- (c) diluted oxygen, wherein the concentration of oxygen is in the range from 1 to 10% of the reaction mixture,
- (ii) cooling the reaction mixture to room temperature and
- (iii) separating the benzaldehyde.
4 more elements
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Dependencies are inferred from the claim text.