Hadi Jabbari - Department of Management, Payam Noor University, Tehran, Iran
Nader Noroozi Pesyan - Department of Organic chemistry, Faculty of Chemistry, Urmia University, Urmia, ۵۷۱۵۹, Iran

A most effective and less energy demanding method of producing fatty esters, polyol esters, by esterifying fatty acids, with a pentaerythritol and trimethylolpropan alcohols in the presence of an acid catalyst at elevated temperature wherein an azeotroping agent, particularly toluene, is used to facilitate continuous removal of water by distillation, formed as a by-product during the esterification reaction. The esterification reaction is completed within 5 hours, pentaerythritol and trimethylolpropan esters were produced.

Polyol Esters, Pentaerythritol ester, Trimethylolpropan ester, Synthetic oil