活性炭负载磷钨酸催化合成三羟甲基丙烷三丙烯酸酯  

Catalytic Synthesis of Trimethylolpropane Triacrylate by Tungstophosphoric Acid Supported on Activated Carbon

作　　者：杨师棣[1] 汤发有[2] 

机构地区：[1]渭南师范学院化学系,陕西渭南714000 [2]陕西师范大学化学系,陕西西安710062

出　　处：《化学世界》2001年第4期200-202,190,共4页Chemical World

摘　　要：制备了负载型磷钨酸催化剂 ,发现 PW/ C的催化活性比 PW/ Si O2 和 PW/ Ti O2 高。以 PW/C作为丙烯酸与三羟甲基丙烷的酯化催化剂 ,在丙烯酸 0 .78mol、三羟甲基丙烷 0 .2 5mol、催化剂用量约为反应物总量的 0 .7% (质量分数 )、反应温度 1 2 0°C,反应时间 60 min的条件下 ,酯化率达94.6% ,产品纯度 >98% ,并且催化剂可多次使用活性没有明显下降。The supported tungstophosphoric acid (PW/C) catalyst was prepared with high the catalytic activity. It was used as the catalyst for esterification of Trimethylolpropane with acrylic acid in liquid solid system. The most suitable conditions for this reaction were: acrylic acid 0.78 mol, trimethylolpropane 0.25 mol, catalyst, 0.7% of the total mass of reactants, temperature 120 °C and reaction time 60 min. The conversion of acrylic acid was 94.6%, the purity of the product was over 98%. The catalyst could be used repeatedly for many times without distinct loss in activity.

关 键 词：三羟甲基丙烷三丙烯酸酯 磷钨酸 催化酯化 活性炭负载型催化剂 

分 类 号：TQ225.24[化学工程—有机化工] O643.36[理学—物理化学]