合成松香酸蔗糖酯的研究

松香酸甲酯化制备松香酸甲酯，再与蔗糖反应合成松香酸蔗糖酯。甲酯化最佳条件为松香酸∶甲醇＝１∶３（摩尔比）、时间１ｈ、温度７０℃、催化剂氢氧化钾用量２％，酯化率为９５．５％。松香酸蔗糖酯最佳合成条件为松香酸甲酯∶蔗糖＝１∶２（摩尔比）、时间３ｈ、温度９０℃、催化剂氢氧化钾用量３％，产物得率为９２．１％。产物有良好表面活性，其２％和４％水溶液的表面张力分别为３０．３３×１０－３Ｎ／ｍ和２７．５０×１０－３Ｎ／ｍ。

Study on the Synthesis of the Sucrose Ester of Rosin Acid

This paper reports the synthesis of the sucrose ester of rosin acid from rosin acid by esterification with methanol and transesterification with sucrose,and the factors influencing on the yield are discussed.The experiment results show that,the optimum synthesis conditions of the rosin acid formate are as follows:rosin acid∶methanol=1∶3(mol/mol),reaction temperature is 70℃,reaction time is 1h,amount of catalyst KOH is 2%.The yield can reach as high as 95.5%.The optimum synthesis conditions of the sucrose ester of rosin acid are as follows:rosin acid formate ∶sucrose=1∶2(mol/mol),reaction temperature is 90℃,reaction time is 3h,amount of catalyst KOH is 3%.The yield of the product can give 92.1%.The surface activity of the product is determined also. 