Patent ID: 7612230
Filing Date: 2009-11-03
Classification: C07C

Abstract:
1. A process for producing acrylic acid, comprising the steps of: a) vaporizing a raw material comprising an aqueous glycerol solution to generate a first gas, wherein said aqueous glycerol solution has a water content, of not more than 20% by weight; b) applying a dehydration reaction to glycerol in a gas phase that includes said first gas; and c) applying a gas phase oxidation reaction to a gaseous reaction product formed by the dehydration reaction to obtain said acrylic acid; and d) conducting the dehydration reaction and the gas phase oxidation reaction in a single-type reactor comprising one reaction tube, where said one reaction tube is filled with catalysts for the dehydration reaction and for the gas phase oxidation reaction uniformly mixed together or with a catalyst which functions both for the dehydration reaction and the gas phase oxidation reaction, thus conducting the dehydration reaction and the gas phase oxidation reaction in said one reaction tube at the same time.