稀土固体超强酸SO_4^(2-)/TiO_2-La^(3+)催化合成尿囊素  

Synthesis of allantoin by SO_4^(2-)/TiO_2-La^(3+)rare-earth solid superacid

作　　者：金华峰[1] 向纪明[1] 李宝璋[2] 

机构地区：[1]安康师范专科学校化学系,陕西安康725000 [2]西北大学化工系,陕西西安720069

出　　处：《化学研究与应用》2003年第3期381-382,共2页Chemical Research and Application

基　　金：陕西省教育厅自然科学专项基金应用基础研究项目(01JK203);安康师专自然科学基金项目(2002AZXZR003)

摘　　要：The synthesis of allantoin from carbamide and ethyl aldehydic acid with rareearth solid superacid SO2-4/TiO2La3+as catalyst was studied.It was found that the optimal experimental conditions were that La3+/TiO2 was immersed for 12h and backed at 550℃ for 3h;the yield of the allantoin could reach up to 745% under molar ratio of carbamide and ethyl aldehydic acid 35∶1,amount of SO2-4/TiO2La3+ solid superacid catalyst of 10g(if the weight of ethyl aldehydic acid was 01mol),the reaction temperature of 73℃～75℃ and reactiom time of 3h.The synthesis of allantoin from carbamide and ethyl aldehydic acid with rareearth solid superacid SO2-4/TiO2La3+as catalyst was studied.It was found that the optimal experimental conditions were that La3+/TiO2 was immersed for 12h and backed at 550℃ for 3h;the yield of the allantoin could reach up to 745% under molar ratio of carbamide and ethyl aldehydic acid 35∶1,amount of SO2-4/TiO2La3+ solid superacid catalyst of 10g(if the weight of ethyl aldehydic acid was 01mol),the reaction temperature of 73℃～75℃ and reactiom time of 3h.

关 键 词：稀土固体超强酸 催化合成 尿囊素 缩合 乙二醛 乙醛酸 尿素 

分 类 号：O626[理学—有机化学] O643.36[理学—化学]