化学学报 ›› 2007, Vol. 65 ›› Issue (7): 625-630. 上一篇    下一篇

研究论文

CuO/SiO2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

沈伟, 杨新艳, 黄静静, 沈江, 杜俊明, 徐华龙*   

  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)
  • 投稿日期:2006-03-08 修回日期:2006-05-08 发布日期:2007-04-14
  • 通讯作者: 徐华龙

Coupling Process of Dehydrogenation of 1,4-Butanediol and Hydrogenation of Dimethyl Maleate over CuO/SiO2 Catalysts

SHEN Wei; YANG Xin-Yan; HUANG Jing-Jing; SHEN Jiang; DU Jun-Ming; XU Hua-Long*   

  1. (Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433)
  • Received:2006-03-08 Revised:2006-05-08 Published:2007-04-14
  • Contact: XU Hua-Long

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.

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

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 results 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 Cu0, the proportion of congregated CuO were increased dramatically as CuO loading weight was higher than 21%.

Key words: 1,4-butanediol, dimethyl maleate, γ-butyrolactone, coupling process, CuO/SiO2