BigPatents India

A process for the production of lower aliphatic esters by contacting in an addition reaction reactants at a temperature in the range from 150-2000C and reaction pressure of 400kPa comprising a lower olefin and a saturated, lower aliphatic, mono-carboxylic acid in the vapour phase with a heteropolyacid catalyst such as herein described characterised in that the reactants are rendered substantially free of aldehydes impurities prior to being brought into contact with the heteropolyacid catalyst. (FIG.)nil