豆渣基炭磺酸催化合成乳酸丁酯

Synthesis of Butyl Lactate Catalyzed by Soybean Residue Based carbon Sulfonic Acid

用豆渣基炭磺酸催化合成乳酸丁酯,从催化剂用量、酸醇比、油浴温度和酯化时间等因素考察合成乳酸丁酯的最优条件,通过红外光谱对豆渣基固体酸进行表征,并采用直接滴定法检测其表面酸量。结果表明,当催化剂用量为乳酸质量的6%、醇酸比1.0∶1.5、油浴温度148℃下酯化5.0 h时,乳酸丁酯的酯化率可达到94.2%。

Soybean residue based carbon sulfonic acid was used to catalyze the synthesis of butyl lactate.The optimal conditions for the synthesis of butyl lactate were investigated from the factors of catalyst dosage,acid alcohol ratio,oil bath temperature and reaction time.The soybean residue based solid acid was characterized by infrared spectroscopy,and its surface acid was detected by direct titration.The results showed that the esterification rate of butyl lactate could reach 94.2%when the amount of catalyst was 6%of the mass of lactic acid,the ratio of alcohol to acid was 1.0∶1.5 and the oil bath temperature was 148℃for 5.0 h.