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负载磷钨酸铵的溶胶-凝胶法制备及催化苯硝化反应的研究
  • ISSN号：1003-0972
  • 期刊名称：《信阳师范学院学报：自然科学版》
  • 时间：0
  • 分类：O643.36[理学—物理化学;理学—化学]
  • 作者机构：[1]聊城大学化学化工学院,山东聊城252059
  • 相关基金：基金项目：国家自然科学基金（20771053）;山东省教育厅科研基金（J08Lc02）;聊城大学大学生科技文化创新基金
作者： 杨丽坤[1], 龚树文[1], 刘丽君[1], 李考真[1], 崔庆新[1], 高金苹[1]
关键词： 磷钨酸铵, 溶胶-凝胶, 催化, 苯, 硝化, ammonium phosphotungstate, sol-gel , catalysis , benzene , nitration
中文摘要：

以正硅酸乙酯为硅源，利用溶胶-凝胶法制备了负载磷钨酸杂多酸铵盐催化剂，利用XRD和IR对催化剂进行了表征，并以苯硝化为模型反应，初步评价了催化剂对硝化反应的催化性能．结果表明，负载催化剂保持了非负载磷钨酸铵杂多酸盐的Keggin结构；负载催化剂对苯硝化反应具有较高的催化活性，反应时间、催化剂用量以及硝酸与苯体积比对催化苯硝化反应有较大的影响，当反应温度为70℃时，最佳实验条件为：5mL苯、15mL硝酸、0．5g催化剂、反应5h；而且苯硝化反应产物中无多硝基苯生成，硝基苯的选择性高；多次使用后，负载催化剂仍表现出了较强的催化活性．

英文摘要：

Supported ammonium phosphotungstate catalyst was prepared by sol-gel method and characterized by X- ray diffraction（XRD） and IR spectra, and catalytic activity of catalyst in nitration of benzene was tested. Experiments results indicated that supported catalyst still presented the Keggin structure of ammonium phosphotungstate catalyst and exhibited high nitration reaction catalytic activity and high selectivity to mononitrobenzene. The best yield rate was ob- tained under reaction conditions as follows： the volume ratio of nitric acid to benzene is 3： 1, catalyst 0.5 g, tempera- ture 70 ℃ and time 5 h. When used for four times, the catalyst still kept high nitration reaction catalytic activity and selectivity to mononitrobenzene.

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期刊信息
  • 《信阳师范学院学报：自然科学版》
  • 北大核心期刊（2011版）
  • 主管单位:信阳师范学院
  • 主办单位:信阳师范学院
  • 主编：刘彦明
  • 地址：河南省信阳市南湖路
  • 邮编：464000
  • 邮箱：xblk@xynu.edu.cn
  • 电话：0376-6393516
  • 国际标准刊号：ISSN：1003-0972
  • 国内统一刊号：ISSN：41-1107/N
  • 邮发代号:36-122
  • 获奖情况:
  • 河南省优秀科技期刊,河南省优秀学报
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,英国农业与生物科学研究中心文摘,波兰哥白尼索引,德国数学文摘,美国剑桥科学文摘,英国动物学记录,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:5214