CuO/SiO_2催化剂上1,4-丁二醇脱氢和顺丁烯二酸二甲酯加氢耦合反应过程  

Coupling Process of Dehydrogenation of 1,4-Butanediol and Hydro- genation of Dimethyl Maleate over CuO/SiO_2 Catalysts

作　　者：沈伟[1] 杨新艳[1] 黄静静[1] 沈江[1] 杜俊明[1] 徐华龙[1] 

机构地区：[1]复旦大学化学系上海市分子催化与功能材料重点实验室,上海200433

出　　处：《化学学报》2007年第7期625-630,共6页Acta Chimica Sinica

摘　　要：以CuO/SiO2为催化剂,在常压固定床反应器上实现了1,4-丁二醇脱氢反应与顺丁烯二酸二甲酯加氢反应的耦合,制备一种重要的精细化学品γ-丁内酯.和传统的反应过程相比,耦合反应提高了顺丁烯二酸二甲酯加氢和1,4-丁二醇脱氢活性.在优选的反应条件下,原料的转化率可达100%,γ-丁内酯的选择性可达98%.CuO的最佳负载量为w=21%附近,和单层分散阈值计算结果基本符合.XRD与TPR表征结果与单层分散阈值计算结果综合表明:催化剂的活性组分为高分散的Cu0,负载量过高使得催化剂聚集态铜晶体的比例和粒度都大大增加.The coupling process of dehydrogenation of 1,4-butanediol and hydrogenation of dimethyl maleate over CuO/SiO2 catalysts to produce one important fine chemical γ-butyrolactone was carried out in a continuous fixed bed reactor under atmospheric pressure. Compared to the conventional reaction process, the activities of catalysts for hydrogenation of dimethyl maleate and dehydrogenation of 1,4-butanediol were enhanced through the coupling process. Under optimum reaction conditions, the conversion of 1,4-butanediol and dimethyl maleate reached 100%, and the selectivity of γ-butyrolactone was 98%. The resuits of XRD and TPR indicated that the optimized loading weight of CuO was about w=21%, which is in accordance with the monolayer dispersion threshold value. The active sites were Cu°, the proportion of congregated CuO were increased dramatically as CuO loading weight was higher than 21%.

关 键 词：1 4-丁二醇 顺丁烯二酸二甲酯 Γ-丁内酯 耦合反应 CuO/SiO2 

分 类 号：O643.32[理学—物理化学]