摘要
以无水AlCl3、阳离子交换树脂和AlCl3改性阳离子交换树脂为催化剂,对丙三醇与丙酮缩合反应进行了研究,AlCl3改性阳离子交换树脂对反应的催化效果最佳.Hammett指示剂法和吡啶吸附红外表征结果表明,采用AlCl3对阳离子交换树脂进行改性后,催化剂的酸强度有所提高,催化活性增强.AlCl3改性阳离子交换树脂催化合成异丙叉甘油的优化反应条件为:反应温度82℃,n丙三醇/n丙酮=1:3,催化剂用量为丙三醇质量的10%,反应时间11h,异丙叉甘油收率为90.9%。
Anhydrous AlCl3, cation exchange resin and cation exchange resin modified by AlCl3 were investigated in condensation of glycerol and acetone. As shown in the results of Hammett indicator and pyridine adsorption infrared spectra, the acid strength and catalytic activity of the cation exchange resin were improved after being modified by AlCl3. The highest yield （90.9%） of 1,2-isopropylidene glycerol was obtained under the conditions of molar ratio of glycerol to acetone of 1：3, catalyst concentration of 10%（ω）, reaction time of 11h, and 82 ℃ temperature with the catalyst cation exchange resin modified by AlCl3.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2008年第2期263-266,共4页
The Chinese Journal of Process Engineering
基金
江苏省高技术研究重大基金资助项目(编号:BG2006034)
