杂多酸催化合成乳酸正丁酯

Catalytic Synthesis of n - Buty Lactate by Heteroploy Acid

研究了以杂多酸催化乳酸和正丁醇合成乳酸正丁酯的反应,探讨了不同催化剂,催化剂用量,原料配比,反应时间,带水剂,催化剂的重复使用次数等对酯化率的影响。实验表明杂多酸为催化剂,具有反应条件温和,催化剂用量少,催化活性高等优点,而且,不腐蚀设备,反应后易处理,污染小。在适宜的工艺条件下,酯化率可达98.53％。催化剂重复使用表明杂多酸是合成乳酸正丁酯的适宜催化剂。

The esterification of lactic acid and n - butyl by using heteropoly acid as catalyst was studied. Effects of catalyst preparation, raw material ratio, reaction temperature and time , the type and amount of catalyst used on the ester yield was investigated. Heteropoly acid was used as catalysts , the condition of the reaction was modeate, the amount of catalyst was little, the catalytic effect was better, and it don' t destroy the apparatus, pollution of the final respolve was small. At optimal reactions conditions, ester yield reachs 98 .53 % . Resablue experiments of the catalyst showed that heteropoly acid was promising catalyst n - buty lactate synthesis.