硫酸钛催化合成乙二醇乙醚乙酸酯

Synthesis of Ethylene Glycol Monoethyl Ether Acetate with Titanium sulfate

摘要:

以乙酸和乙二醇乙醚为原料合成乙二醇乙醚乙酸酯，选用活性高的硫酸钛做催化剂，通过单因素实验，得到了适宜合成条件：加料量以乙二醇乙醚0.2mol计， m（硫酸钛）：m（乙二醇乙醚）=0.055，n乙酸：n乙二醇乙醚=1.5:1,环己烷用量15ml，加热温度130℃，反应时间3h。在此条件下，乙二醇乙醚乙酸酯收率达99%，选择性100%，产品采用IR，1HNMR等对其结构进行了表征，催化剂重复使用5次仍保持较高活性，采用XRD,TPD对硫酸钛进行了表征。

Abstract:

Ethylene glycol monoethyl ether acetate was synthesized from ethylene glycol monoethyl ether and acetic acid，high activity of titanium sulfate selected as catalyst.Through single factor experiment,got the proper conditiongs for the synthesis: Based on 0. 2 mol ethylene glycol monoethylether , titanium sulfate/ Ethylene glycol monoethyl ether mass ratio of 0.055:1, acetic acid / ethylene glycol monoethyl ether molar ratio of 1. 5:1, mount of cyclohexane of 15ml, reaction temperature of 130 ℃, and reaction time of 3 h.Under this condition, give the highest yield of ethylene glycol monoethyl ether acetate is above 99%,selecticiy of 100%, Its structure was confirmed by IR, 1HNMR,catalyst reused five times still have high activity , titanium sulfate were characterized by XRD and TPD.