摘要
研究了丙酸与丁醇在壳聚糖硫酸盐催化剂作用下的酯化反应,考察了反应时间、催化剂用量、醇酸摩尔比等因素对丙酸丁酯酯化率的影响。实验结果表明反应的最佳条件为:丙酸用量为0.1mol,醇酸摩尔比为1.4,壳聚糖硫酸盐用量为1.2g,反应时间为1.5h,酯化率达97.2%,催化剂重复使用5次仍保持较高活性。无污染产生,具有绿色合成的特点。产品经折光率、红外光谱进行了表征。
The esterification of n-butyl alcohol with propionic acid was studied by using chitosan sulfate as catalyst. The effect of some factors, such as reaction time, the amount of catalysts and the ratio of n-butyl alcohol to propionic acid on the yield of n-butyl propionate were carefully studied. The experiment results showed 1hat the best reaction conditions were as follows： when the amount of propionic acid was 0. 1 mol. the ratio of n-butyl alcohol to propionic acid was 1.4, the amount of chitosan sulfate was 1.2g, through reacting 1.5 h, the yield of n-butyl propionate reached 97.2 %. The catalyst kept high capability after reused five times. The process has no pollution and characters of green synthesis. The product was characterized by refrac tire index and IR.
出处
《香料香精化妆品》
CAS
2007年第2期14-16,共3页
Flavour Fragrance Cosmetics
关键词
丙酸丁酯
壳聚糖硫酸盐
丙酸
丁醇催化酯化
n-butyl propionate chitosan sulfate propionic acid n butyl alcohol catalytic esterifieation
