气固相催化羟醛缩合合成α-氯丙烯酸甲酯的研究  

Study on Synthesis of Alpha-methyl Chloroacrylate by the Vapor-phase Aldol Condensation

作　　者：谢颖[1] 肖林久[2] 王宜阳[1] 邢志强[3] 

机构地区：[1]沈阳化工学院应用化学学院,辽宁沈阳110142 [2]沈阳化工学院科研处,辽宁沈阳110142 [3]辽宁大学化学系,辽宁沈阳110036

出　　处：《辽宁化工》2005年第5期203-205,共3页Liaoning Chemical Industry

摘　　要：研究了以V/P摩尔比为1∶2.8,浸渍时间3h,活化温度为450℃的负载型催化剂V2O5-P2O5/SiO2作为催化剂,在气固相催化羟醛缩合合成α-氯丙烯酸甲酯,考察了对反应条件的优化,解释和分析了反应条件中诸因素对合成α-氯丙烯酸甲酯的影响。实验结果给出常压下合成α-氯丙烯酸甲酯的最佳反应条件:空速1200h-1,反应温度300℃,氯乙酸甲酯/甲缩醛摩尔比为2.4∶1。最佳反应条件下,所得甲缩醛转化率为76.2%,α-氯丙烯酸甲酯的选择性为58.5%,收率为44.58%。The catalyst V_2O_5-P_2O_5/SiO_2 (V/P=1:2.8, the time of dipping is 3h, the active temperature is 450℃) was chosen as the catalyst in the alpha-methyl Chloroacrylate synthesis process by the vapor-phase aldol condensation. The optimized synthesis reaction conditions of alpha-methyl Chloroacrylate were studied, explained and analyzed. The optimum reaction conditions:the space velocity is 1200h^(-1), the reaction temperature is 300℃,n(alpha-methyl Chloroacrylate)/n(methylal)=2.4:1. And the conversion of methylal is 76.2%, the option of alpha-methyl Chloroacrylate is 58.5%, the yield of alpha-methyl Chloroacrylate is 44.58%.

关 键 词：丙烯酸甲酯 气固相催化 羟醛缩合 合成 最佳反应条件 负载型催化剂 氯乙酸甲酯 浸渍时间 SiO2 活化温度 反应温度 摩尔比 甲缩醛 450 转化率 收率 

分 类 号：TQ254.15[化学工程—有机化工] O632.52[理学—高分子化学]