SO_4^(2-)/ZrO_2-SiO_2固体酸催化剂制备工艺优化及在尿囊素中的应用  

Optimization of preparation process of SO_4^(2-)/ZrO_2-SiO_2 solid acid catalyst and its application in allantoin

作　　者：刘思乐 郭瓦力[2] 李德豹 何鑫 LIU Sile;GUO Wali;LI Debao;HE Xin(Shenyang Institute of Science and Technology,Shenyang 110167,China;Shenyang University of Chemical Technology,Shenyang 110142,China))

机构地区：[1]沈阳科技学院,辽宁沈阳110167 [2]沈阳化工大学,辽宁沈阳110142

出　　处：《化工科技》2019年第2期15-19,共5页Science & Technology in Chemical Industry

基　　金：辽宁省自然科学基金资助项目(201602596)

摘　　要：研究了SO■/ZrO_2-SiO_2固体酸催化剂的制备,考察了催化剂制备过程中m(Si)∶m(Zr)、c(浸渍液)及焙烧温度对酸强度的影响,并采用IR、SEM对催化剂结构进行了表征。结果表明,SO■/ZrO_2-SiO_2固体酸催化剂适宜的制备条件为m(Si)∶m(Zr)=1∶4,c(浸渍液)=1.0 mol/L,预焙烧温度300℃,焙烧温度550℃,催化剂的酸强度为13.56 mmol/g。在乙醛酸与尿素反应制备尿囊素过程中,使用固体酸催化剂明显提高了尿囊素的收率。The preparation process of SO^2-4/ZrO2-SiO2 solid acid catalyst was studied,the effect factors of zirconium-silicon ratio,impregnation concentration and calcination temperature on acid strength were investigated,and the structure of catalyst was characterized by IR and SEM.The results indicated that suitable preparation conditions of SO^2-4/ZrO 2-SiO2 solid acid catalyst were silicon-zirconium ratio 1∶4,impregnation concentration 1.0mol/L,calcination temperature 550 ℃ and pre-baking temperature 300℃.The acid strength of the catalyst was 13.56mmol/g at the above-mentioned conditions.In the process of preparing allantoin by reacting glyoxylic acid with urea,the yield of allantoin was obviously increased by using solid acid catalyst.

关 键 词：固体酸 催化剂 尿囊素 SO^2-4/ZrO2-SiO2 

分 类 号：TQ072[化学工程]