Synthesis of trimethylolpropane oleic acid ester catalyzed by ionic liquid

The synthesis of trimethylolpropane oleic acid ester from trimethylolpropane and oleic acid catalyzed by ionic liquids was investigated. The results showed that the conversion of oleic acid reached 98.5% under the optimum condition as follows: n(trimethylolpropane): n(oleic acid) = 1.1:3, ionic liquid ([C_6H_(10)N_2]~+C_2H_6O_3S~-) dosage 10%-15% of the total mass of trimethylolpropane and oleic acid, water carrying agent dimethylbenzene amount 40% of the total mass of the reactants, reaction temperature (150-160)℃ and reaction time 4.0 h.