PROCESS FOR PRODUCTION OF a,ß-UNSATURATED CARBOXYLIC ESTERS AND a,ß-UNSATURATED CARBOXYLIC ESTERS

摘要

A process for the production of a,ß-unsaturated carboxylic esters by reacting (A) an alcohol with (B) an a,ß-unsaturated carboxylic acid or a lower alkyl ester thereof in the presence of (a) an inorganic porous substance carrying sulfonic acid groups; and a,ß-unsaturated carboxylic esters obtained by the process which each have a sulfur content of 50ppm or below based on the weight of the carboxylic ester and each contain by-product ethers and by-product adducts in amounts of as small as 2 % by mole or below and as small as 1 % by mole or below respectively based on the molar amount of the carboxylic ester. Thus, the invention provides a process for the production of a,ß-unsaturated carboxylic esters which is not accompanied by the generation of a large amount of waste; a process for the production of high-purity a,ß-unsaturated carboxylic esters which little brings about by-products; and high-purity a,ß-unsaturated carboxylic esters which little contain a catalyst residue and are reduced in the corrosiveness on metals.