【摘要】 以L-(+)-酒石酸和乙醇为原料,直接合成了L-(+)-酒石酸二乙酯,其结构经过IR确证,比旋光度经旋光仪测定。通过正交实验得优化反应条件为:L-(+)-酒石酸0.6mol,n(酒石酸)∶n(乙醇)为1∶5,带水剂CCl4用量70mL,催化剂用量为20g,酯化反应温度69℃,回流反应约5h,酯收率93%。催化剂使用寿命较长,再生能力较强。更多还原

【Abstract】 L-(+)-diethyl tartrate was synthesized catalyzed by a strong acid cation exchange resin from L-(+)tartaric acid and ethanol, using a strong acid cation exchange resin and carbon tetrachloride as a catalyst and a solvent,by refluxing for about 5h.The structure of the product is confirmed by IR, the specific rotator power is determined by polarimeter.The effect of molar ratio of reactants,amount of solvent and catalyst,and reaction temperature on the yield were discussed by orthogonal test.The optimum reaction conditions were as follows:the molar ratio of L-(+)-tartaric acid and n-ethanol at 1∶5, resin at 20g, carbon tetrachloride at 70mL and reaction temperature at 69℃.Under the optimum condition,the yield of L-(+)-diethyl tartrate was over 93%.The resin has longer catalyst life, and good regeneration ability.更多还原