刘俊峰,戚蕴石.杂多酸对二甘醇脱水环化反应的催化作用[J].分子催化,1999,(6):419-423
杂多酸对二甘醇脱水环化反应的催化作用
Cyclization of Diethylene Glycol on Heteropoly Acid
  
DOI:
中文关键词:  二甘醇 杂多酸 脱水 环化反应 催化作用 催化剂
英文关键词:Diethylene glycol,Heteropolyacid,Dehydration,1,4-Dioxane
基金项目:
刘俊峰  戚蕴石
[1]湘潭工学院 [2]华东理工大学工业催化研究所
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中文摘要:
      研究了杂多酸对二甘醇脱水环化的催化作用。结果表明,磷钨酸,硅钨酸,硅钼酸具有较高的催化活性,而磷钼酸的催化活性较低。采用TG,IR,GC-MS,电导等测试技术,对正丁胺酸性,杂多阴离子碱度,还原特性的测定及对产物结构的分析。
英文摘要:
      Catalytic performance of HPAS (heteropolyacids) such as 12- tungstosphosphoric acid (PW12), 12- tungstosilicic acid (SiW12), 12-molybdophosphoric acid (PMo12), and 12-molybdosilicic acid (SiMo12) were studied for the etherification of diethylene glycol.It has been shown that PW12 SiW12, and SiMo12, have higher activities for this reaction. The results of GC, GC-MS, IR, n -butylamine titrition, the mensuration for the molar conductivity of solutions, and the determination of basicity and susceptibility to reduction of the heteropoly anions, indicate that if the acidity of HPA is too strong and the heteropoly anions are too soft, 1, 4-dioxane will isomerize to 2-methy1-1, 3-dioxolane.
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