乙醇酸甲酯催化加氢制备乙二醇

Catalytic hydrogenation of methyl glycolate to ethylene glycol

在微型固定床反应器上,以乙醇酸甲酯为原料,使用Cu-Cr催化剂,催化加氢制备了乙二醇。考察了氢酯摩尔比、反应温度、反应压力、床层空速对反应的影响,并对加氢催化剂的活性进行了XRD的评价。结果显示最佳反应条件为:氢酯摩尔比40∶1、反应温度210℃、反应压力3.5 MPa、床层空速0.4 h-1时,乙醇酸甲酯的转化率达94%,乙二醇的选择性达82%。

In a micro fixed-bed reactor,preparation of ethylene glycol by catalytic hydrogenation of methyl glycolate using composite copper-based catalyst Cu-Cr was studied.The effects of mole ratio of hydrogen to methyl glycolate,reaction temperature,pressure,space velocity on the hydrogenation reaction were investigated.The activity of the catalysts was evaluated by XRD.The results showed that under optimized conditions of reaction temperature 210 ℃,reaction pressure around 3.5 MPa,molar ratio of hydrogen to methyl glycolate close to 40︰1,space velocity about 0.4 h-1,the conversion of methyl glycolate to ethylene glycol reached 95%,and the molar selectivity of ethylene glycol reached 90 %.