催化脱氢法制备乙基己酸.pdf

催化脱氢法制备2- 乙基己酸 1 1 1 2 1 1 1 张琼洁 刘林学 赵彬侠 罗利军 李红亚 董甲庆 陈燕妮 1．西北大学化工学院，陕西 西安 710069 ；2.渭南技术学院 陕西 渭南 714000 摘要：通过共沉淀法制备了系列单组分金属氧化物 MgO ，ZnO ，MnO2 ，NiO ，CeO2 催化剂， 以 2- 乙基己醇（异辛醇）为原料,在氢氧化钠存在的情况下，经常压催化脱氢合成了 2- 乙基 己酸（异辛酸）。考察了催化剂种类、原料配比对2- 乙基己酸收率的影响，确立了适宜的反 应工艺条件:原料配比为 n (2- 乙基己醇) ∶n (氢氧化钠)=1.6 ∶1 ，以单组分ZnO 为合氧化物 为催化剂，此条件下 2- 乙基己酸的收率可达到 65.1%，纯度为 86.0%。说明单组分 ZnO 催 化剂是传统催化剂的良好换代产品。所得产品异辛酸合成液经气相色谱分析，与异辛酸样品 的标准图谱一致，可以确认所合成产品为目的化合物。与传统方法相比，该工艺具有原料来 源可靠、反应选择性高、不产生大量三废、并且易于实现工业化生产。 关键词：2- 乙基己醇；2- 乙基己酸；催化脱氢 中图分类号：TQ630.4 + 4 文献标识码： A 文章编号： 2-Ethylhexanoic Acid Synthesis by Catalytic Dehydrogenation 1 1 1 ZHANG Qiongjie LIU Linxue ZHAO Binxia 2 1 1 1 LUO Lijun LI Hongya DONG Jiaqing CHEN Yanni 1.College of Chemical Engineering，Northwest University ，Xi’an 710069 ，Shaanxi China； 2.College of Technology ，Weinan University ，Weinan 714000 ，Shaanxi China Abstract: 2-ethylhexanoic acid was synthesized by 2-ethylhexanol with sodium hydroxide in the presence of catalyst which was prepared by coprecipitation method and under atmosphere. The mono component catalyst was synthesized 2-ethylhexanoic acid are described and compared.The mono component catalyst is ZnO. The effects of mole ratio of raw materials and variety of the catalyst on the yield of 2-ethylhexanoic acid have been studied in the experiments.The results show that about 65.1% and 86.0% of yield and purity efficiency were obtained when mole ratio of 2-ethylhexanol to sodium hydroxide is 1. 6 ：1，the catalyst is ZnO. This techniques consists of a serier of