Process for producing unsaturated carboxylic acid esters

摘要

An ester of an unsaturated carboxylic acid is prepared by an ester exchange process which comprises reacting a lower alkyl ester of an unsaturated, 3-4 carbon atom carboxylic acid with an alcohol different than the alcohol fragment of said lower alkyl ester over a catalyst selected from the group consisting of (1) metallic barium, barium compounds and mixtures thereof, (2) metallic thallium, thallium compounds or mixtures thereof, (3) metallic molybdenum, molybdenum compounds or mixtures thereof, and mixtures thereof by an ester exchange reaction.