离子液体催化酸化油甲酯化工艺及其特性

以酸化油为原料，自制离子液体为催化剂，采用甲酯化方法制备脂肪酸甲酯。通过考察甲醇与脂肪酸物质的量比、离子液体催化剂加入量、反应温度和反应时间对甲酯化反应的影响，最佳反应条件：甲醇与脂肪酸物质的量比9∶1，离子液体催化剂用量为甲醇与游离脂肪酸总质量的25%，反应温度65 ℃，反应时间2.0 h。通过测量原料酸化油与产物的含水量，证明离子液体催化剂具有良好的带水性，有利于甲酯化反应的进行。该方法不仅可降低生产成本，减少环境污染，也能避免油脂资源问题，具有较高经济效益和社会效益。

Process for methyl esterification of acidification oil catalyzed by ionic liquid and its features

Methyl esters of fatty acids was synthesized via methyl esterification using acidification oil as the feedstock and self-made ionic liquid as the catalyst. Effects of methanol-to-fatty-acids molar ratio, dosage of catalyst, reaction temperature and reaction time were investigated, with optimum condition obtained as follows ： methanol to fatty acids molar ratio 9： 1, dosage of catalyst 25% of total mass of methanol and fatty-acids, reaction temperature 65 ℃, reaction time 2 h. Water content in acidification oil and product was determined, which proved the excellent water-carrying capability of the ionic liquids. The latter favors proceeding of esterification.