Synthetic Study of Boric Diglyceride Stearic Acid Ester Surfactant

Boric acid ester surfactant was prepared from Boric acid and Glycerin and stearic acid with strong ion exchange resin as catalyst in nitrogen.The title compound was identified by IR.The optimal esterification conditions were designed based on experiments.The results showed that: when the molar ratio of boric acid/glycerin was 1∶2.0,the reaction temperature was 180℃,and the reaction time was 4 h,the yield of boric diglycerin was 96.0%.And when the molar ratio of boric diglyceride/stearic acid was 1∶0.9,the reaction temperature was 200℃,the reaction time was 3.5h and w(catalyst)=2.0%(relative to stearic acid),the conversion ratio of lauric acid was 96.4%,boric diglycerin nutmeg acid ester and boric diglycerin stearic acid ester's esterification condition were same as boric diglycerin lauric acid ester's,nutmeg acid conversion was 97.0%,stearic acid conversion was 96.4%,separately.The process has advantages on acid conversion and post-treatment.