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›› 2009, Vol. 9 ›› Issue (6): 1232-1236.

• 材料工程专栏 • 上一篇    下一篇

Ni-Cu/g-Al2O3催化剂上月桂腈的加氢性能

于清跃 武文良 曾崇余   

  1. 南京化工职业技术学院化工系 南京工业大学化学化工学院材料化学工程国家重点实验室 南京工业大学化学化工学院材料化学工程国家重点实验室
  • 收稿日期:2009-05-19 修回日期:2009-07-22 出版日期:2009-12-20 发布日期:2009-12-20
  • 通讯作者: 武文良

Hydrogenation Performance of Lauronitrile over Ni-Cu Supported g-Al2O3 Catalyst

YU Qing-yue WU Wen-liang ZENG Chong-yu   

  1. State key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering, Nanjing University of Technology State key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering, Nanjing University of Technology State key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering, Nanjing University of Technology
  • Received:2009-05-19 Revised:2009-07-22 Online:2009-12-20 Published:2009-12-20
  • Contact: WU Wen-liang

摘要: 用Cr和Na对浸渍法制备的g-Al2O3负载Ni-Cu催化剂进行改性,用H2-TPD和CO2-TPD技术表征催化剂H2吸附能力和碱性质,并考察了其对月桂腈加氢反应的催化性能. 结果表明,Cr和Na改性后催化剂H2吸附能力显著增强,碱性质得到调节,Ni-Cu-Cr-Na/g-Al2O3催化剂具有最大H2吸附能力和最大低强度碱量及最大活性,月桂腈转化率为98%,伯胺选择性为99.2%. 优化反应条件为:氢分压2.0 MPa,反应温度70℃,反应时间30 min,搅拌转速600 r/min. 反应10次后,月桂腈的转化率由98%降为94.8%,伯胺的选择性维持在98%以上.

关键词: 镍, 铜, 三氧化二铝, 月桂腈, 加氢

Abstract: A series of Ni-Cu/g-Al2O3 catalysts were prepared by impregnation method. After modification by Na and Cr, the catalysts were characterized by TPD technology using H2 and CO2 as probe molecules to test their hydrogen adsorption abilities and alkali properties. And their catalytic performances were measured in hydrogenation of lauronitrile. The results show that hydrogen adsorption amount of catalyst was enhanced and the alkali nature adjusted observably, while the sample Ni-Cu-Cr-Na/g-Al2O3 owned the most hydrogen adsorption amount as well as the most low temperature alkali scalar. The catalyst Ni-Cu-Cr-Na/g-Al2O3 was provided with the best catalytic abilities of hydrogenation, with conversion rate of lauronitrile 98% and selectivity of primary dodecylamine 99.2% under the optimal reaction conditions of hydrogen fractional pressure 2.0 MPa, reaction temperature 70℃, reaction time 30 min,and stirring speed 600 r/min. The stability tests show that the result reacting for 10 times was conversion rate of lauronitrile 94.8% and selectivity of primary amine kept highly above 98.0%.

Key words: nickel, copper, aluminum oxide, lauronitrile, hydrogenation

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