气固相催化羟醛缩合合成丙烯酸乙酯的研究  

Study of Synthesis of Ethyl Acrylate by the Vapor-phase Aldol Condensation

作　　者：王宜阳[1] 肖林久[1] 赵鸣玉[1] 刘永绩[1] 冯瑞冬[1] 

机构地区：[1]沈阳化工学院,辽宁沈阳110021

出　　处：《沈阳化工学院学报》2001年第3期166-169,共4页Journal of Shenyang Institute of Chemical Technolgy

摘　　要：主要研究制备硅胶浸渍的VP氧化物催化剂的工艺条件对催化活性的影响以及反应条件对甲缩醛与乙酸乙醋合成丙烯酸乙醋的影响 .用浸渍法制备的V/P原子个数比分别为 1∶1 0 6、1∶2、1∶2 8、1∶3 2、1∶4 0的氧化物催化剂 ,确定V/P原子个数比为 1∶2 8的二元氧化物催化剂在3 0 0℃ ,乙酸乙酯 :甲缩醛 =1 .8∶1 ,及GHSV =2 5 0 0h- 1条件下 ,获得甲缩醛转化率为 82 5 % ,丙烯酸乙酯产率为 49 3 4%的结果 .The main aim of this research is the investigation of V P/SiO\-2 catalyst prepared by impregnation method.It was found that the activity of the catalyst for the synthesis of ethyl acrylate from methylal and ethyl acetate was effective. V P/SiO\-2 catalyst with V∶P=1∶1.06;1∶2;1∶2.8;1∶3.2;1∶4. (molar ratio) was prepared by impregnated method used silica gel as carrier. The catalyst with V∶P= 1∶2.8 has the most effective activity. At the following conditions: reaction temperature is 300 ℃,molar ratio of ethyl acetate: methylal is 1.8∶1,GHSV=2 500 h\+\{-1\},the conversion of methylal is 82.5 %. The yield of ethyl acrylate is 49.34 %.

关 键 词：硅胶 偏钒酸铵 羟醛缩合 气固相催化 合成 丙烯酸乙酯 

分 类 号：TQ225.241[化学工程—有机化工]