摘要
合成了甲基磺酸亚铈，研究了以甲基磺酸亚铈为催化剂合成无毒增塑剂柠檬酸三丁酯，考察了催化剂用量、醇酸物质的量比、反应温度等因素对反应结果的影响，对合成的产品进行了红外光谱分析。实验结果表明，甲基磺酸亚铈催化合成柠檬酸三丁酯的最佳条件为：n（正丁醇）：n（柠檬胺）=4．50：1，催化剂用量为0．25％（以酸的物质的量计），反应温度120—130℃，在最佳反应条件下，柠檬酸三丁酯收率可达98．6％。反应结束后，催化剂通过简单的相分离即可重复使用。甲基磺酸亚铈重复使用5次后，其催化活性无明显下降，产品收率仍可达到90％以上。
Cerous methanesulfonate was synthesized and used as the catalyst in the esterification of citric acid with butanol. The effects of amount of catalyst, alcohol/acid molar ratio and reaction temperature have been investigated. The products were analyzed by means of FT - IR spectroscopy. The optimum conditions for the synthesis of TBC over cerous methanesulfonate are ： molar ratio of butanol to citric acid, 4.50：1 ; amount of catalyst, 0.25% （molar percentage of citric acid） and reaction temperature, 120 - 130℃. The yield can reach to 98. 6%. The catalyst can be reused by simple phase - separation after reaction. It is used repeatedly for 5 times without obvious loss of activity and with the yield still over 90.0%.
出处
《化学工程师》
CAS
2008年第8期54-57,共4页
Chemical Engineer
关键词
甲基磺酸亚铈
无毒增塑剂
柠檬酸三丁酯
催化
cerous methanesulfonat
nontoxic plasticizer
tri- n- butyl citrate （TBC）
catalyst
