化工进展

• 研究开发 • 上一篇    下一篇

合成钼钒磷杂多酸的新方法及其催化性能

张富民,郭麦平,葛汉青,王 军   

  1. 南京工业大学化学化工学院
  • 出版日期:2006-10-25 发布日期:2006-10-25

A new method for synthesis of molybdovanadophosphoric heteropoly
acids and their catalytic activities

ZHANG Fumin,GUO Maiping,GE Hanqing,WANG Jun   

  1. College of Chemistry and Chemical Engineering,Nanjing University of Technology
  • Online:2006-10-25 Published:2006-10-25

摘要: 通过反应含化学计量的MoO3、V2O5和H3PO4的混合液,开发了一种环境友好制备钼钒磷杂多酸H3+nPMo12-nVnO40•xH2O (PMoVn,n=1~3) 的方法。通过ICP元素分析,TG、XRD和IR等表征,证明钒原子取代钼进入了杂多酸的Keggin骨架。在以冰乙酸和乙腈的混合物为溶剂,双氧水为氧化剂,催化苯羟基化制取苯酚的反应中,所制备的催化剂表现出良好的催化活性。其中,PMoV2具有最高的活性,对应的苯转化率为34.5%,苯酚的选择性为100%。

Abstract: An environmentally benign method for the synthesis of heteropoly acids H3+nPMo12-n VnO40•xH2O (PMoVn,n=1—3) was developed by the reaction of an aqueous slurry which contained stoichiometric amounts of MoO3,V2O5 and H3PO4. Characterization of the as-synthesized catalysts with ICP elemental analysis,TG,XRD and IR spectroscopy,indicated that V ions substituted for Mo ions in Keggin-type phosphomolybdic acid. The as-synthesized samples were found to be an efficient catalyst for hydroxylation of benzene which was carried out in a mixed solvent of acetonitrile and acetic acid with aqueous hydrogen peroxide as oxidant. PMoV2 exhibited the highest benzene conversion of 34.5% with phenol selectivity of 100%.

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn