硅锆双组分交联累托土固体酸催化剂的制备  

Performance of the Mixed Si/Zr Pillared Rectorite

作　　者：秦国平[1] 郭锡坤[1] 林绮纯[1] 刘筠[1] 

机构地区：[1]汕头大学化学系,汕头515063

出　　处：《天然气化工—C1化学与化工》2003年第3期21-23,共3页Natural Gas Chemical Industry

基　　金：广东省教育厅自然科学研究项目;汕头大学工业催化"2 1 1工程"建设项目和汕头大学研究与发展基金资助

摘　　要：用硅锆双组份交联剂交换Na基累托土中的水合钠离子,再引入SO2-4作促进剂进行改性,制备了SO2-4改性硅锆双组份交联累托土固体酸催化剂SO2-4/Si Zr CLR,以柠檬酸和正丁醇酯化反应作探针,考察了催化剂的制备条件对其催化活性的影响。实验结果表明,当[Si]/[Zr]为0 1mol/mol、[Si] [Zr]/clay为3 5mmol/g、SO2-4/clay的SO2-4质量分数为30%、650℃焙烧2h所制得的催化剂具有较好的催化活性和稳定性,第1次使用时能使柠檬酸的转化率达到96 95%,经反复再生后第5次使用,仍可使柠檬酸转化率达92 78%。The mixed Si/Zr pillared rectorite (SO2-4/SiZrCLR), prepared by cation exchange of NaRectorite with mixed Si/Zr pillaring agent and modified by SO2-4, was used as solid acid catalyst The influence of different preparing conditions on the activity of the catalyst was measured in the esterification of citric acid with nbutanol The results showed that SO2-4/SiZrCLR exhibited high activity and good stability in the synthesis of TBC when the following preparing conditions were chosen: [Si]/[Zr]=01/1(mol/mol),[Si]-[Zr]/clay=35mmol/g, SO2-4/clay=30wt%, calcined at 500℃ for 2 hr It made the conversion of citric acid being up to 9563% in the first synthesis and after four regeneration still up to 9278%

关 键 词：硅锆交联累托土 固体酸催化剂 催化活性 稳定性 

分 类 号：O621.25[理学—有机化学]