相转移法催化合成生物柴油

以大豆油和甲醇为原料,在K2CO3与相转移催化剂四丁基溴化铵(TBAB)作用下,合成生物柴油。考查相转移催化剂种类及用量、K2CO3用量、反应时间、醇油物质量比和反应温度对生物柴油产率影响;实验结果表明,制备生物柴油最佳条件为:TBAB用量为大豆油质量0.6%、K2CO3用量为大豆油质量1.5%、醇油物质量比为6∶1、反应时间为20 min、反应温度为40℃;在此条件下,制备生物柴油产率可达95%以上。

Synthesis of biodiesel by phase transfer catalysis

Biodiesel was synthesized starting soybean oil and methanol using K2CO3and phase–transfer catalysis TBAB.It was studied that yield of the reaction can be changed with reaction factors such as the kind and the amount of phase–transfer catalysis,the amount of K2CO3,reaction time,molar ratio between methanol and soybean oil,reaction temperature.The results show that the reaction conditions are as following:mass ratio of TBAB to soybean oil weight 0.6%,mass ratio of K2CO3 to soybean oil weight 1.5%,molar ratio between methanol and soybean oil 6∶1,reaction time 20 min,reaction temperature 40 ℃.The conversion rate of biodiesel reached 95% under the optimum reaction conditions.