The solid superacid SO42-/TiO2 is modified by Fe3+and Ce4+ doping in the impregnation method.The catalysis of the solid superacid is investigated after doping.The preparation conditions of catalysis are optimized to increase the yield of the allantoin.The results show that,when Ce4+:TiO2=0.06% and Fe3+:TiO2=0.2%,the dipping solution is sulfuric acid,its concentration is 0.66 mol·L-1,the impregnating solution volume is 15 mL/g,the soaking time is 20 h,the calcination temperature is 540 ℃ and the baking time ...
【基金】
河北科技大学2010年大学生科技创新基金项目(TiO2为载体固体超强酸催化尿囊素的研究)
【更新日期】
2011-05-17
【分类号】
TQ252.3
【正文快照】
Study on SO42-/TiO2Doped by Fe3+and Ce4+in the Synthesis ofAllantionDONG Lan-fen,ZHAO Di-shun,ZHAO Hui,YANG Jie,LV Bin尿囊素化学名称为1-脲基间二氮杂茂烷-2,4-二酮,属于咪唑类杂环化合物,是一种多性能、优质的精细化工中间体,具有促进细胞增长、软化角质层蛋白、催?