Catalytic converter and its use null for unsaturated carboxylic acid production

摘要

PURPOSE: To provide a catalyst having a novel shape for favorably producing unsaturated carboxylic acid from unsaturated aldehyde. ;CONSTITUTION: This catalyst is a cylindrical catalyst having a circular cross-section having a center hole inside. This catalyst is a catalyst grain having the center hole which has a cross-sectional shape composed of three rounded projecting curves in contact with a circumscribed circle and the same numbers of rounded recessed curve. At least molybdenum and vanadium are contained as a catalyst component. As a result, the yield at the time of obtaining unsaturated carboxylic acid by vapor phase oxidation reaction of unsaturated aldehyde is improved.;COPYRIGHT: (C)1994,JPO&Japio