丁二酸二甲酯催化加氢制备γ-丁内酯的工艺研究

Research on Catalytic Hydrogenation of Dimethyl Succinate to γ-Butyrolactone

在微型固定床反应器中,丁二酸二甲酯在复合铜基催化剂Cu-ZnO-ZrO2/A12O3作用下,催化加氢制备了γ-丁内酯。实验中考察了催化剂组成、反应温度、压力、氢酯摩尔比、溶剂比和液时空速等因素对加氢反应的影响。结果显示,在反应温度为220℃、压力为3.0 MPa、n(H2)∶n(丁二酸二甲酯)=150∶1、V(CH3OH)∶V(丁二酸二甲酯)=4∶1、床层液时空速为0.25 h-1的条件下,丁二酸二甲酯的转化率达到100%,γ-丁内酯的选择性达到90%。

In a micro fixed-bed reactor,the preparation of γ-butyrolactone by the catalytic hydrogenation of dimethyl succinate using composite copper-based catalyst Cu-ZnO-ZrO2/Al2O3 was investigated.Effects of catalyst composition,reaction temperature,pressure,mole ratio of hydrogen to dimethyl succinate,volume ratio of solvent to solute,space velocity on the hydrogenation reactions were investigated.The results showed that in the optimized conditions when reaction temperature at 220 ℃,reaction pressure around 3.0 MPa,molar ratio of hydrogen to dimethyl succinate close to 150∶1,ratio of solvent and solute near 4∶1,space velocity about 0.25 h-1,the conversion rate of dimethyl succinate reached 100%,the molar selectivity of γ-butyrolactone reached 90%.