中国炼油与石油化工 ›› 2014, Vol. 16 ›› Issue (01): 40-44.

• Catalyst Research • 上一篇    下一篇

ZrOCl2?8H2O: 一种低廉高效的催化剂在酯化反应中的应用

蔡杰1,张秋云2,黄从敏3,周开志3,马培华3   

  1. 1. 贵州大学理学院
    2. 贵州大学精细化工研究开发中心
    3. 贵州大学 化学与化工学院
  • 收稿日期:2013-11-25 修回日期:2013-12-12 出版日期:2014-03-30 发布日期:2014-03-30
  • 通讯作者: 蔡杰 E-mail:sci_jcai@163.com
  • 基金资助:
    教育部

ZrOCl2?8H2O: An Efficient and Cheap Catalyst for Esterification of Free Fatty Acids into Methyl Esters

  • Received:2013-11-25 Revised:2013-12-12 Online:2014-03-30 Published:2014-03-30

摘要: 以ZrOCl2?8H2O为催化剂,月桂酸与甲醇为原料,经酯化反应制备得到生物柴油,研究了催化剂用量、反应时间及酸醇摩尔比对酯化反应的影响。结果表明,廉价的ZrOCl2?8H2O表现出了较高的催化活性,在催化剂用量为4 wt.%,月桂酸与甲醇摩尔比为1:10,反应2 h,甲醇回流条件下,月桂酸甲酯转化率达97.0%,且该催化剂重复使用三次仍具有较好的催化效果;同时该催化剂能适用于不同低碳链醇的酯化反应及不同碳链长度脂肪酸及高酸值非粮油料与甲醇的酯化反应,表明该催化剂有望使用于低劣油料制备生物柴油。

关键词: 月桂酸, 无机盐, 酯化反应, 生物柴油

Abstract: The esterification of lauric acid with methanol could be efficiently catalyzed by ZrOCl2?8H2O, and this reaction was studied to develop a green method for biodiesel production. The influencing factors, such as amount of catalyst, reaction time and molar ratio of acid to methanol, were investigated. The results indicated that the ZrOCl2?8H2O catalyst showed high catalytic activity, and gave a 97.0% methyl laurate conversion rate under the following optimized conditions, viz.: a lauric acid/methanol molar ratio of 1:10, a catalyst dosage of 4%, and a reaction duration of 2 h at methanol refluxing temperature. The catalyst could be easily recovered while its activity could be well retained after three cycles. The ZrOCl2?8H2O catalyst also exhibited excellent catalytic activity for the esterification of different free long-chain fatty acids (including non-edible oils with high acid value) with different short carbon chain alcohols. Therefore, the ZrOCl2?8H2O catalyst has good potential for the synthesis of biodiesel from low-cost feedstocks such as waste vegetable oils and non-edible oils.

Key words: Lauric acid, Inorganic salt, Esterification, Biodiesel