乙二醇单乙醚醋酸酯合成用固体催化剂的筛选及催化作用分析  

THE SCREENING AND CATALYTIC ACTIVITY OF CATALYSTS FOR THE SYNTHESIS OF ETHYLENE GLYCOL MONOETHYL ETHER ACETATE

作　　者：张保国[1] 何静[1] 段雪[1] 孙鹏[1] 李峰[1] 王作新[1] 

机构地区：[1]北京化工大学

出　　处：《Chinese Journal of Catalysis》1995年第4期293-298,共6页催化学报（英文）

摘　　要：采用自建动态酯化反应实验装置，通过色谱分析测定了不同催化剂上乙二醇单乙醚醋酸酯合成反应的转化率～时间关系曲线．根据多种催化剂的活性及寿命，筛选出一种较为理想的锆基催化剂．该催化剂在实验条件下，反应２ｈ，转化率达９７％，对目标产物的选择性为１００％．采用程序升温分解（ＴＰＤＥ）及吡啶的程序升温脱附（ＴＰＤ），Ｘ射线衍射（ＸＲＤ）等手段，对新鲜的和重复使用的锆基催化剂进行分析．结果表明，催化剂中的结晶水受到Ｚｒ４＋的诱导作用，使催化剂表面产生较强的Ｂ酸中心，从而对反应具有较高的催化活性；催化剂结晶水不受使用次数的影响，使得催化剂具有稳定的结构，因而具有较长的使用寿命．he ethylene glycol monoethyl ether acetate(I ) has been synthesized by using dynamic method. The reaction rates were determined bygas chromatographic analysis. A high activity and long service life zirconium-containing catalyst was chosen in comparison with several otherkinds of catalyst. The EtOCH2CH2OH conversion and selectivity for(I) were 97% and 100% respectively. The fresh catalyst and catalystsused for several times were studied by TPDE, XRD and TPD of pyridine. Because the crystal water of the catalyst produces strong sites ofBronsted acid, the catalyst possesses high activity.The crystal water ofthe catalyst is stable and its structure is not changed after use.Therefore, the catalyst containing zirconium has long service life.

关 键 词：固体酸 催化剂 乙二醇单乙醚 醋酸酯 

分 类 号：O623.624.1[理学—有机化学] O643.36[理学—化学]