泔水油经2次酯化处理制备生物柴油  

Biodiesel preparation from waste cooking oils

作　　者：李体海[1] 刘睦超 李敬生[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013 [2]济宁市轻工纺织工业办公室,山东济宁272017

出　　处：《江苏大学学报（自然科学版）》2011年第4期478-481,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50474037)

摘　　要：经1次酯化法使泔水油(初始酸值约125.46 mg.g-1)达到酸值为3 mg.g-1以下的醇解要求,需要7～8 h.在不改变原工艺路线的条件下,利用常规酸、碱催化剂,进行分步酯化,分离中间产物,加速反应,可缩短总反应时间.酯化条件为:醇油摩尔比5∶1,催化剂质量分数1.0%,温度110℃.第1次酯化时间3.5 h,第2次1 h,总时间为4.5 h,缩短了2.5～3.5 h,处理后的原料油酸值为2.657 mg.g-1.以此中性油为原料,在醇油摩尔比7∶1,催化剂质量分数1.0%,温度65℃,时间75 min条件下,原料转化率达94%以上,试验产品质量达到0#柴油的要求.It takes 7-8 h to decrease the acid value（AV）of waste cooking oils from 125.46 mg·g-1 to 3 mg·g-1 for one step esterification reaction.Based on one-step process,two-step esterification process was adopted by separating intermediate to speed reaction equilibrium with normal acid and base catalysts.The optimal reaction condition is alcohol-oil ratio of 5 with catalyst amount of 1.0% at 110 ℃.The total reaction time is 4.5 h with first esterification time of 3.5 h and second esterification time of 1 h,which is shor-tened by 2.5-3.5 h.The AV can be decreased to 2.657 mg·g-1 after treatment.With 1% catalyst,the neutral oil was reacted with alcohol-oil ratio of 7 at 65 ℃ for 75 min.The conversion rate reaches 94% and the performance can meet the main index of 0# diesel.

关 键 词：泔水油 生物柴油 酯化反应 醇解反应 酸值 

分 类 号：TQ314.2[化学工程—高聚物工业]