离子液体催化工业脂肪酸酯化反应工艺研究

Esterification of industrial fatty acids catalyzed by ionic liquid

以B酸离子液体为催化剂,催化脂肪酸酯化制备生物柴油。考察了离子液体用量、反应温度、反应时间和甲醇流量对酯化反应的影响。结果表明:在反应温度120℃,反应时间4 h,甲醇流量50 mL/h,催化剂用量4%的最佳反应条件下,转化率达99.55%,脂肪酸酸值(KOH)由反应前的181.42 mg/g降到0.82 mg/g。

Synthesis of biodiesel from industrial fatty acids catalyzed by the ionic liquid was studied.The effects of ionic liquid dosage,reaction temperature,reaction time,and methanol flow rate on the esterification reaction were investigated.Optimal condition was obtained as follows： ionic liquid dosage 4%（based on the oil weight）,reaction temperature 120℃,reaction time 4 h,methanol flow rate 50 mL/h.Under the optimal condition,the conversion rate of fatty acid methyl ester was 99.55%,and the acid value was reduced from 181.42 mgKOH/g to 0.82 mgKOH/g.