期刊文献+

碳酸二乙酯与苯酚催化合成苯乙醚 被引量:4

Catalytic Synthesis of Phenetole by Ethylation of Phenol with Diethyl Carbonate
在线阅读 下载PDF
导出
摘要 以碳酸二乙酯(DEC)为乙基化试剂,与苯酚在气固相条件下催化合成苯乙醚。以活性炭(AC)为载体考察了不同活性组分及其负载量对催化剂活性的影响。实验结果表明,以K2CO3为活性组分,负载量达到20%(质量分数)时K2CO3/AC催化剂的活性较好。CO2程序升温脱附表征结果表明,K2CO3/AC催化剂的碱量随K2CO3负载量的增加先增大后减小,这主要是由于K2CO3负载量过多会堵塞催化剂的内孔,从而抑制其碱性中心发挥作用。同时还考察了反应温度、气态空速和原料配比对催化剂活性的影响,在反应温度593K、反应压力0.6MPa、反应时间7h、气态空速1500h-1、n(DEC)∶n(苯酚)=1.5的条件下,苯酚的转化率和苯乙醚的选择性都可达到100.00%。 Catalytic synthesis of phenetole by ethylation of phenol with diethyl carbonate( DEC ) in fixed bed reactor was investigated. Catalyst of 20% ( mass fraction) K2CO3 loaded on active carbon (AC) exhibited the high catalytic activity and stability. The CO2 -TPD and BET characterization show that basicity of K2CO3/AC increases with K2CO3 loading and reaches a maximum at 20% K2CO3. Further more K2CO3 loading may cause obvious lowering of BET specific surface area and pore volume. It may be the main reason for decreases of basicity and activity of the catalyst. The effects of reaction temperature, gas hourly space velocity (GHSV) and n ( DEC ) : n (phenol) on conversion of phenol and selectivity to phenetole were studied. Conversion of phenol increased with the reaction temperature, but DEC would decompose at higher temperature. Under reaction conditions of 593 K, 0.6 MPa,7 h, GHSV 1 500 h^-1 and n(DEC) : n(phenol) 1.5, both conversion of phenol and selectivity to phenetole can reach 100.00%.
出处 《石油化工》 EI CAS CSCD 北大核心 2007年第11期1157-1161,共5页 Petrochemical Technology
基金 国家重大基础研究前期研究项目(2003CCA03200) 江苏省高技术研究项目(BG2006015) 江苏省高校重大基础研究项目(06KJA5013)
关键词 碳酸二乙酯 苯酚 苯乙醚 碳酸钾 活性炭 乙基化 固体碱催化剂 diethyl carbonate phenol phenetole potassium carbonate active carbon ethylation solid base catalyst
  • 相关文献

参考文献11

  • 1马新宾,张震,石海峰,陈学成,王胜平.碳酸二乙酯的合成方法[J].化学通报,2003,66(8):528-535. 被引量:39
  • 2薛冰,陈兴权,赵天生.碳酸二甲酯作甲基化试剂催化合成对甲基苯甲醚[J].石油化工,2004,33(11):1032-1035. 被引量:15
  • 3Samedy O, Sophie T, Elisabeth B, et al. High Performance Method for o - Methlation of Phenol with Dimethyl Carbonate. Appl Catal, A, 2003, 241( 1 - 2) : 227 - 233
  • 4Samedy O, Sophie T, Elisabeth B, et al. o - Methylation of Phenolic Compounds with Dimethyl Carbonate Under Solid/ Liquid Phase Transfer System. Tetrahedron Lett, 2002, 43 (14): 2661 -2663
  • 5Kim W B, Kim Y G, Lee J S. The Role of Carbon Deposition in Gas Phase Transesterification of Diethylcarbonate and Phenol over TiO2/SiO2 Catalyst. Appl Catal, A, 2000, 194 -195 (1):403 -414
  • 6Ma Xinbin, Wang Shengping, Gong Jinlong, et al. A Comparative Study of Supported TiO2 Catalysts and Activity in Ester Exchange Between Dimethyl Oxalate and Phenol. J Mol Catal A: Chem, 2004, 222(1 -2) : 183 -187
  • 7梅付名,裴志,李光兴.由碳酸二甲酯合成芳香醚的绿色工艺[J].现代化工,2004,24(1):20-23. 被引量:10
  • 8薛冰,柳娜,陈兴权,赵天生.KOAc/NaY催化合成邻甲基苯甲醚[J].石油化工,2006,35(5):416-419. 被引量:5
  • 9Jyothi T M, Raja T, Talawar M B, et al. Selective o - Methylation of Catechol Using Dimethyl Carbonate over Calcined Mg - Al Hydrotalcite. Appl Catal, A, 2001, 211( 1 ) : 41 -46
  • 10Fu Y, Baba T, Ono Y. Vapor -Phase Reactions of Catechol with Dimethyl Carbonate. Part Ⅰ. o - Methylation of Catechol over Aluminaq. Appl Catal, A, 1998, 166(2) : 419 -424

二级参考文献24

  • 1赵硕,罗惠萍.间-甲基苯甲醚相转移催化合成研究[J].精细化工,1993,10(1):53-55. 被引量:8
  • 2薛冰,陈兴权,赵天生.碳酸二甲酯作甲基化试剂催化合成对甲基苯甲醚[J].石油化工,2004,33(11):1032-1035. 被引量:15
  • 3章思规,精细有机化学品技术手册,1993年,1470页
  • 4魏文德,有机化工原料大全.3,1990年,655页
  • 5Reddy B M, Vijaya K M, Jeeva R K. Selective Oxidation of pMethoxybenzaldehyde over V2O5/CaO- MgO Catalysts. Appl Catal, A, 1999,181: 77- 85
  • 6Ono Y. Dimethyl Carbonate for Environmentally Benign Reactions.Catal Today, 1997,35:15 - 25
  • 7Fu Y, Baba T, Ono Y. Vapor - Phase Reaction of Catechol with Dimethyl Carbonate, Part I. o- Methylation of Catechol over Alumina. Appl Catal, A, 1998,166: 419- 424
  • 8Memoli S, Selva M, Tundo P. Dimethylcarbonate for Eco- friendly Methylation Reactions. Chemosphere, 2001,43:115- 121
  • 9Delledonne D, Rivetti F, Romano U. Developments in the Produntion and Application of Dimethylcarbonate. Appl Catal, A, 2001,221:241-251
  • 10Ono Y. Catalysis in the Produntion and Reactions of Dimethyl Carbonate, an Environmentally Benign Building Block. Appl Catal, A,1997,155:133- 166

共引文献68

同被引文献39

引证文献4

二级引证文献5

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部