【摘要】 以高酸值油脂和甲醇为原料,研究了六种无机盐在生物柴油酯化反应中的催化活性。结果表明,硫酸氢钠的催化酯化活性最好,并得到最优化条件如下:醇酸物质的量10∶1,反应温度70℃,反应时间300m in,催化剂用量4%,酯化率达到90.5%。优化条件下,二次酯化率达到98%,且催化剂易回收,具有良好的重复使用性能。更多还原

【Abstract】 Catalytic activity of six inorganic salts in the esterification of high acid value oil with methanol was studied.Results showed that catalytic activity of sodium hydrogen sulfate was the best.The optimal parameters of esterification were as follows: molar ratio of methanol to oil 10∶1,reaction temperature 70 ℃,reaction time 300min and the amount of sodium hydrogen sulfate 4%,the transformation rate was 90.5%,use two steps esterification,the transformation rate was 98%.The catalyst could be recovered easily and used repeatedly.更多还原