磁性固体超强酸SO_4^(2-)/TiO_2-Fe_3O_4催化合成柠檬酸三辛酯  

Synthesis of Trioctyl Citrate Using Magnetic Solid Superacid for Catalytic

作　　者：林谦[1] 张汉洪[1] 

机构地区：[1]福建师范大学福清分校,福建福清350300

出　　处：《广州化工》2009年第5期103-105,共3页GuangZhou Chemical Industry

摘　　要：研究了以磁性固体超强酸SO42-/TiO2-Fe3O4为催化剂,以柠檬酸和正辛醇为原料催化合成无毒增塑剂柠檬酸三辛酯(trioctyl citrate,简称TOC)。考察了影响酯化率的各种因素,并对产品进行红外光谱分析。确定最适宜的反应条件是:反应温度为205℃,催化剂用量为1.75g,酸醇比为1:6.5,当反应时间2.0h时,酯化率可达到97.3%。结果表明,磁性固体超强酸SO42-/TiO2-Fe3O4是合成柠檬酸三辛酯的优良催化剂,同时利用催化剂的磁性可将催化剂迅速分离。Nontoxic plasticizer trioctyl citrate （TOC） was synthesized from citric acid and n - octanol using SO4^2-/TiO2-Fe3O4 magnetic solid superacid as the catalyst. The influence of various factors on esterification percentage was inveatigated. The results showed that esterifieation percentage of over 97.3% was obtained under the optimum reaction condition as follows ： reaction temperature of 205℃, the amount of catalyst 1.75g, acid to alcohol ratio of 1 ： 6.5, reaction time 2. Oh. The catalyst could be easily separated from the product by magnetic separation.

关 键 词：磁性固体超强酸 柠檬酸三辛酯(TOC) 催化合成 

分 类 号：TQ426.8[化学工程] TQ225.241