棉籽油脱臭馏出物中脂肪酸甲酯化工艺研究

Methyl esterification of fatty acid in cottonseed oil deodorizer distillate

棉籽油脱臭馏出物中含有40%-80%的游离脂肪酸,对这部分脂肪酸的甲酯化进行了研究。考察了甲醇用量、催化剂用量、酯化温度、酯化时间对脂肪酸甲酯化的影响。结果表明,脂肪酸甲酯化优化条件为甲醇/原料为2∶1(V/W),催化剂/原料为0.005∶1(V/W),酯化温度65℃,酯化时间3 h;在此条件下脂肪酸甲酯化率达到98%以上。

The percentage of free fatty acid （FFA） in cottonseed oil deodorizer distillate （CODD） is 40% -80%. The methyl esterification of these free fatty acids was studied, and the esterification conditions were optimized. The results showed that the optimized esterification conditions were as follows：ratio of methanol to material 2：1 （ V/W）, ratio of catalyst to material 0.005：1 （ V/W）, esterification temperature 65 ℃ and esterification time 3 h. The esterification rate is over 98% under the optimized conditions.