高酸值废油萃取反应耦合脱酸酯化工艺的研究.pdfVIP

研究与探讨 高酸值废油萃取反应耦合脱酸 、酯化工艺的研究 张 　奕 ,陆向红 ,俞云良,计建炳 (浙江工业大学 化学工程与材料学院 ,杭州 3 100 14) 摘 　要 : 以高酸值餐饮废油和甲醇为原料 ,强酸性阳离子交换树脂同时作为固体酸催化剂和萃取填料 ,在 自制 的固定床反应器中进行了萃取 —反应的耦合过程 ,成功降低了高酸值油脂的酸值 ,并合成了脂肪酸甲酯 。考察 了流量 、醇油比对酸值和游离脂肪酸酯化率的影响 ,得到了优化参数 :醇油质量比 1 1∶、反应温度 60 ℃、流量 2. 6 mL /m in,该实验条件下 ,原料油酸值从 52. 45 m g KOH / g油降低到 3. 22 m g KOH / g;过柱次数对油相脱酸效果的 影响很小 。 关键词 :生物柴油 ;强酸性阳离子交换树脂 ;高酸值油脂 ;萃取 ;酯化 中图分类号 : TQ517. 4　　　　文献标识码 : A 　　　　　文章编号 : 1004 - 3950 (2008) 06 - 0005 - 05 Study on the coupling process of ca ta lytic ester ifca tion and extraction w ith wa ste o il ZHAN G Yi, L U X iang hong, YU Yun liang, et a l (College of Chem ical Engineering and M aterials Science, Zhej iang Un iversity of Technology, Hangzhou 310014 , Ch ina) A b stract: Fatty acid m ethyl esters were p rep ared from wa ste o il w ith h igh fatty acid con tent and the acid value wa s re duced by the coup ling p roce ss of catalytic e sterification and extraction w ith m ethano l in a selfm ade fixed bed reactor. In the coup ling p rocess, the cation re sin wa s u sed a s both so lid acid catalyst and p adding. Exp erim en tal resu lts showed that the op tim um p aram eters of the p roce ss were as follow s: ratio of m ethanol to o il 1 1∶, temp erature 60 ℃ and flow rate 2. 6 mL /m in. U nder the exp erim en tal condition s, the acid value of o il was reduced from 52. 45 m gKOH / g oil to 3. 22 m gKOH / g oil. B e sides, the tim e s of cycling had little imp act on the deacidification efficiency. Key words: b iodie sel, acidic an ion exchange re sin s, h igh FFA o il, extraction, e sterification