Dawson型磷钨酸催化合成乳酸月桂醇酯

用Dawson型磷钨酸催化合成乳酸月桂醇酯。实验结果表明:Dawson型磷钨酸有较高的催化活性,反应时间短,酯收率高,工艺简单。最佳工艺条件为:醇/酸摩尔比为1.5:1,催化剂用量为0.3%,带水剂甲苯体积(mL)与反应物质量(g)之比为0.4:1~0.5:1,反应温度为115~140℃,反应时间30~50min。在此条件下,酯收率可超过93% 。

Synthesis of Dodecyl Lactate by Dawson Phosphotungsticacid Catalyst

Dodecyl lactate was synthesized using dawson phosphotungsticacid as catalyst. The results showed that Dawson phosphotungsticacid had high catalytic activity, the reaction time was short, the yield of the ester was high and the technology was simple. The proper technical parameters for process, i.e. the molar ratio of alcohol to acid was 1.5:1, the mass ratio of the catalyst to the reactants was 0.3%, the ratio of toluene (mL) to the reactants (g) was 0.4:1~0.5:1, the reaction temperature was 115~140℃, the reaction time was 30~50min. Under these conditions, the yield of the ester was over 93%.