无铬催化剂用于马来酸二甲酯加氢制备γ-丁内酯  

STUDY ON THE PROCESS OF DIMETHYLMALATE HYDROGENATION WITH NO-CHROMIUM CATALYST

作　　者：王海京[1] 高国强[1] 杜泽学[1] 

机构地区：[1]石油化工科学研究院,北京100083

出　　处：《精细石油化工》2017年第3期36-39,共4页Speciality Petrochemicals

摘　　要：在马来酸二甲酯加氢制备γ-丁内酯的反应过程中,采用铜-铝系氧化物催化剂替代铜-铬氧化物催化剂,去除了污染严重的铬。实验考察了反应温度、压力、氢酯比和液时空速等工艺条件对反应的影响,结果表明,适宜的反应条件为:反应温度225~232℃,压力<0.5MPa,氢酯摩尔比(40~70)∶1,液时空速≤0.8h^(-1),在此条件下,反应转化率大于90%,γ-丁内酯选择性约90%。Copper/chromium metal oxide catalyst was replaced with copper/aluminum oxide catalyst during hydrogenation of dimethyl maleate to γ-butyrolactone. So the serious pollution of chromium was removed. The effects of hydrogenation process conditions, for example reaction temperature, pressure, hydrogen ester molar ratio and liquid hourly space velocity on the reaction were investigated. The results showed that the optimum hydrogenation conditions were temperature 225 - 232 ℃, p 〈0.5 MPa, hydrogen/dimethyl maleate molar ratio of （40-70） ： 1 and liquid hour space velocity （LHSV） ≤0.8 h-1. In this condition,the conversion of the reaction is 〉90% ,the selectivity of γ-bu- tyrolactone is about 90%.

关 键 词：马来酸酯 Γ-丁内酯 加氢催化剂 

分 类 号：TQ426.8[化学工程]