无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
催化材料

介孔Cu/MS-1催化羟基化苯酚合成苯二酚

  • 余天华 ,
  • 黄启朋 ,
  • 司徒成
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  • 贵州师范大学生命科学学院,贵州贵阳 550001
余天华(1973— ),男,副教授,博士,主要研究方向为多项催化;E-mail: tianhua_yu@163.com

收稿日期: 2020-08-27

  网络出版日期: 2021-02-06

基金资助

贵州师范大学2014年博士科研启动资助项目(600204)

Synthesis of dihydroxybenzenes by hydroxylation of phenol over Cu/ MS-1 with mesoporous

  • Tianhua Yu ,
  • Qipeng Huang ,
  • Cheng Situ
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  • School of Life Sciences,Guizhou Normal University,Guiyang 550001,China

Received date: 2020-08-27

  Online published: 2021-02-06

摘要

以十六烷基三甲基溴化铵(CTAB)为模板剂,采用溶胶凝胶法合成具有介孔的S-1载体(MS-1),浸渍法制备Cu/MS-1催化剂,用于以双氧水为氧化剂、苯酚直接羟基化合成苯二酚的反应,运用正交实验法[L25(56)]对反应条件进行优化。使用X射线电子能谱(XPS)、N2的等温吸附-脱附和 H2的程序升温还原等方法对催化剂的结构和性能做了表征。结果表明:具有介孔的Cu/MS-1有利于反应物和生成物的快速扩散,催化性能明显优于Cu/S-1;高分散CuO相对质量分数最高的5.5% Cu/MS-1的催化活性最好,在优化条件下,苯二酚的产率达到47.2%,选择性为86.7%。具有介孔和MFI结构的Cu/MS-1稳定性强,重复使用5次后,苯二酚的产率仍达43.2%。

本文引用格式

余天华 , 黄启朋 , 司徒成 . 介孔Cu/MS-1催化羟基化苯酚合成苯二酚[J]. 无机盐工业, 2021 , 53(2) : 94 -99 . DOI: 10.11962/1006-4990.2020-0110

Abstract

The mesoporous S-1(MS-1) supporter was synthesized by sol-gel method with cetyltrimethyl-ammonium bromide(CTAB) as template.Cu/MS-1 catalyst was prepared by impregnation method,and then it was used to synthesis dihydroxy-benzenes directly by hydroxylation phenol with H2O2 as oxidation.The experimental conditions were optimized by orthogonal experimental[L25(56)].The structure and properties of catalyst were characterized by means of X-ray photoelectron spectro-scopy(XPS),N2 adsorption-desorption and H2 temperature programmed reduction et al.The results showed that Cu/ MS-1 with mesoporous promised to rapid diffusion in pore of reactants and products,and was better catalytic performance than that of Cu/S-1.Under optimal conditions,the 5.5% Cu/MS-1 with the highest relative mass fraction of highly dispersed CuO pos-sessed the best catalytic activity among the catalysts; the yield of dihydroxybenzenes was 47.2% with the selectivity of 86.7%.The catalysts with mesoporous and MFI structure had a good sustainability,and its dihydroxybenzenes yield was 43.2% after recycle 5 times.

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