Preparation of trimethylolpropane-trioleate esterification: a kind of green lubricant

The synthetic technology of trimethylolpropane-trioleate esterification from oleic acid and trimethylolpropane was studied by using SO42-/TiO2 solid super acid as catalyzation,and employing single-factor and orthogonal-design experiments.The results show that the optimal esterification reaction conditions were as follows: esterification temperature 150 ℃,esterification time 4 hours,mole ratio of oleic-acid to trimethylolpropane 3.2︰1,dosage of catalyst 2.0%.The yield of trimethylolpropane-trioleate was 91.3 %.The structure of the product was proved by IR spectrum.