Br(φ)nsted酸性功能化离子液体催化合成大豆油生物柴油

摘要

制备一种Br(φ)nsted酸性功能化离子液体并进行表征,然后将该离子液体用于催化合成大豆油生物柴油.结果表明:该离子液体酸性与浓硫酸十分接近,且具有较好的稳定性;该离子液体具有良好的催化性能,在离子液体催化剂与大豆油摩尔比1∶10、甲醇与大豆油摩尔比12∶1、反应时间5h、反应温度140℃的最佳条件下,生物柴油产率达到96.57％,并且该离子液体重复使用7次生物柴油产率保持在95％以上;通过该方法制得大豆油生物柴油的主要理化指标基本达到-10#柴油的国V标准.%A kind of Br(φ)nsted acid functionalized ionic liquid was prepared and characterized,and it was used to produce biodiesel from soybean oil.The results showed that the acidity of ionic liquid was comparable to the acidity of the concentrated sulfuric acid and it had a good stability.The ionic liquid had good catalytic activity for producing biodiesel from soybean oil.The yield of biodiesel was up to 96.57％ under the optimal conditions of molar ratio of ionic liquid to soybean oil 1∶ 10,molar ratio of methanol to soybean oil 12∶ 1,reaction time 5 h,and reaction temperature 140 ℃.The yield of biodiesel kept above 95％ after the ionic liquid was recycled for seven times.The primary physicochemical indexes of the soybean oil biodiesel met the state V standard of-10 # diesel.