SO_4^(2-)/SnO_2-SiO_2固体酸催化合成月桂酸甲酯  

Synthesis of Methyllaurate over SO_4^(2-)/SnO_2-SiO_2 as Catalyst

作　　者：孟丽娜[1] 田志茗[1] 

机构地区：[1]齐齐哈尔大学化学与化工学院,黑龙江齐齐哈尔161006

出　　处：《化工时刊》2011年第8期17-19,共3页Chemical Industry Times

基　　金：黑龙江省教育厅科学技术研究项目(12511597)

摘　　要：采用溶胶凝胶法制备了SO42-/SnO2-SiO2固体催化剂,通过NH3-TPD测得此催化剂在200～250°C和500～530°C范围内有两个吸收峰,分别归属于弱酸中心和强酸中心,总酸量为1.658 2 mmol/g。以SO42-/SnO2-SiO2固体酸作为催化剂合成月桂酸甲酯,正交实验结果表明:月桂酸与甲醇的物质的量比为1∶10,催化剂SO42-/SnO2-SiO2用量为月桂酸质量的5%,回流反应时间为4h的条件下,酯化率可达80.54%,且催化剂可重复使用。SO42-/SnO2-SiO2 as a solid catalyst had been prepared by sol-gel method.The NH3-TPD profiles show that desorption peaks with maximum in the range 200-250°C and 500-530°C are attributed to NH3 chemisorbed on weak and strong acid sites on the surface of the solid catalyst,respectively.The total amount of acid was 1.6582 mmol·g-1.The catalysts show best catalytic activity in synthesis of methyl laurate.The optimum conditions of the esterification by orthogonal experiments were studied： the molar of methanol to laurate 1：10,mass fraction of the catalyst in Lauric acid 5%,reaction time 4h.The yield of methyllaurate can reach 80.54 %.The catalyst could be reused for many times.

关 键 词：SO42-/SnO2-SiO2 固体酸 催化 月桂酸甲酯 

分 类 号：TQ225.24[化学工程—有机化工]