| abstract |
A process for producing 1,4-glycol diester from unsaturated glycol diesters prepared by reacting butadiene, acetic acid and oxygen or an oxygen-containing gas in the presence of a palladium catalyst or, from saturated glycol diesters prepared by hydrogenating said unsaturated glycol diesters, wherein, 1,4-glycol diester is separated from the isomer mixture of glycol diesters prepared, the residual glycol diester isomers are decomposed by heating and butadiene and/or acetic acid produced on decomposition are recycled to the process for the production of glycol diesters. |