纳米稀土固体超强酸SO_4^(2-)/TiO_2/La^(3+)的制备及催化合成尿囊素的研究  

Preparation of Nano-sized SO_4^(2-)/TiO_2/La^(3+) Rare-earth Solid Superacid and Study on Synthesis of Allantoin

作　　者：申湘忠[1] 谢善梅[1] 胡婷[1] 

机构地区：[1]湖南人文科技学院化学与材料科学系,湖南娄底417000

出　　处：《湖南人文科技学院学报》2008年第2期22-26,共5页Journal of Hunan University of Humanities,Science and Technology

摘　　要：用纳米稀土固体超强酸SO42-/TiO2/La3+为催化剂,以尿素和乙二醛为原料合成了尿囊素。考察了原料配比、pH值、活化温度、硫酸浓度对催化剂催化活性,以及原料配比、反应温度、反应时间、催化剂用量对尿囊素合成的影响。The allantoin was synthesized starting from carbamide and glyoxal by rare - earth nano-sized solid superacid SO4^2-/TiO2/La^3＋ . The effect on the rate of materials, pH vaule, baking temperature, soaked concentration of H2SO4 on catalytic activity of catalyst were studied. And the effect of mole ratio of carbamide and glyoxal, reaction temperature, reaction time and catalyst amount on yield was investigated.

关 键 词：尿囊素 纳米 稀土固体超强酸SO4^2-/TiO2/La^3+ 乙二醛 缩合 

分 类 号：O622.4[理学—有机化学]