Process for preparing esters

摘要

A process for preparing esters which comprises reacting a polycarboxylic acid with an alcohol, removing the unreacted alcohol from the resultant esterification reaction mixture, heating the crude ester at a temperature of 160 DEG to 340 DEG C., contacting the heat-treated crude ester with an adsorbent, and recovering the ester of high purity. The ester obtained has superior electrical insulation, transparency and thermal stability.