催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (4): 605-609.DOI: 10.1016/S1872-2067(11)60341-0

• 研究论文 • 上一篇    下一篇

Cu30Cr5/碱性氧化铝催化 2,2,6,6-四甲基哌啶酮加氢

马建超, 刘帅, 范小鹏, 杜小宝, 闫喜龙a, 陈立功b   

  1. 天津大学化工学院, 天津 300072
  • 收稿日期:2011-10-14 修回日期:2011-11-08 出版日期:2012-04-13 发布日期:2015-09-09

Hydrogenation of 2,2,6,6-Tetramethylpiperidin-4-one over Cu30Cr5/Basic Alumina

MA Jianchao, LIU Shuai, FAN Xiaopeng, DU Xiaobao, YAN Xilonga, CHEN Ligongb   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2011-10-14 Revised:2011-11-08 Online:2012-04-13 Published:2015-09-09

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摘要： 在2,2,6,6-四甲基哌啶酮连续化加氢生成 2,2,6,6-四甲基哌啶醇的反应中, Cu30Cr5/碱性氧化铝比Cu30Cr5/γ-Al2O3 具有更优异的催化性能, 反应的转化率和选择性分别高达 99.0% 和 97.2%. N2 物理吸附-脱附、X 射线光电子能谱、X 射线衍射和氨气程序升温脱附结果表明, Cu0 作为催化加氢反应的活性中心, 在 Cu30Cr5/碱性氧化铝中具有更好的分散性, 且随着碱性氧化铝的引入, 催化剂酸性大幅下降, 从而有效抑制副产物 2,6-二甲基-4-庚酮的生成, 因而产物 2,2,6,6-四甲基哌啶醇的选择性显著提高.

关键词: 2,2,6,6-四甲基哌啶酮, 2,2,6,6-四甲基哌啶醇, 碱性氧化铝, 2,6-二甲基-4-庚酮, 铜, 铬, 伽马氧化铝

Abstract: Alumina B (basic alumina, pH > 8) was used as the support of copper-chromium catalysts for continuous hydrogenation of 2,2,6,6-tetramethylpiperidin-4-one (TAA) to 2,2,6,6-tetramethylpiperidin-4-ol (TMP). It was found that Cu30Cr5/alumina B exhibited better catalytic performance than Cu30Cr5/γ-Al2O3. 99.0% conversion of TAA and 97.2% selectivity for TMP were obtained over Cu30Cr5/alumina B under optimized conditions. Cu30Cr5/γ-Al2O3 and Cu30Cr5/alumina B were characterized by N2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectroscopy, and NH3 temperature-programmed desorption. The results showed that Cu particles dispersed better in Cu30Cr5/alumina B than in Cu30Cr5/γ-Al2O3.

Key words: 2,2,6,6-tetramethylpiperidin-4-one, 2,2,6,6-tetramethylpiperidin-4-ol, basic alumina, 2,6-dimethyl-4-heptanone, copper, chromium, γ-alumina