采用微波加热与共沸精馏分水联合方法合成松香丁酯

Synthesis of Butyl Ester Rosin by Method of Combining Microwave Heating and Water Separation from Azeotropic Rectification

利用硫酸作催化剂 ,在微波加热与共沸精馏分水联合的新型酯化反应装置中合成松香丁酯。最佳反应条件为 :正丁醇与松香的摩尔比为 6∶ 1、催化剂用量为松香用量的 6 %、反应时间为 1 2 0 min,微波功率为 6 0 7.5W。粗产品酸值为 5 2 mg KOH/ g,产率为 92 %。

A new esterification equipment of combining microwave heating and water separation from azeotropic rectification solves the problem of the reaction quickly under the condition of microwave but water separation slowly This equipment can synthesize butyl ester rosin within 2 hours.The effect of the reaction substance's ratio,microwave power and the catalyzer dosage on the reaction process is discussed