乙二醇单乙醚醋酸酯的合成工艺改进研究

介绍了以乙二醇单乙醚和醋酸为原料,对甲苯磺酸为催化剂合成乙二醇单乙醚醋酸酯的改进工艺。探讨了催化剂、溶剂、反应温度、物料比这几个因素对反应产率的影响。结果表明,最佳反应条件:催化剂对甲苯磺酸∶乙二醇单乙醚=1∶25(摩尔比),溶剂为甲苯,乙二醇单乙醚∶醋酸=1∶1.2(摩尔比),最佳反应温度为150~165℃,反应时间为3 h,采用套用工艺最终得产率95.1%。该工艺步骤简单,生产设备投资低,具有较强的技术优势,易于工业化。

Study on improvement of preparation of ethyleneglycol monoethylether acetate

In this paper,we took ethyleneglycol monoethylether and acetate as the raw material to synthesize ethyleneglycol monoethylether acetate with the catalyst of toluene-p-sulfonic acid.The effect of catalyst,solvent,reaction temperature,the mole ratio of materials on yield were discussed.We could receive the best reaction condition∶the catalyst is toluenep-sulfonic acid that the ratio is 1∶25(paratoluenesulfonic acid: ethyleneglycol monoethylether),the solvent is toluene,the temperature is 150～165℃,the reaction time is 3～4 h,and the ratio of raw materials is 1∶1.2.After using indiscriminately,the yield is(95.1%).The new technology has strong technical superiority,such as simpler process,less investment,and so on.