高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (12): 1631.

• 研究论文 • 上一篇    下一篇

合成云母蒙脱石及其交联物在乙醇氨化反应中的催化行为

任北原1, 刘子阳1, 蒋大振1, 闵恩泽2, 何鸣元2   

  1. 1. 吉林大学化学系, 长春, 130023;
    2. 北京石油科学研究院
  • 收稿日期:1990-12-25 出版日期:1991-12-24 发布日期:1991-12-24
  • 通讯作者: 蒋大振
  • 基金资助:

    国家自然科学基金

Catalytic Behaviour of Synthetic SMM and Pillared SMM in the Animation of Ethanol

Ren Bei-yuan1, Liu Zi-yang1, Jiang Da-zhen1, Min En-ze2, He Ming-yuan2   

  1. 1. Department of Chemistry, Jilin University, Changchun, 130023;
    2. Beijing Research Institute of Petroleum Processing, Beijing
  • Received:1990-12-25 Online:1991-12-24 Published:1991-12-24

摘要: 用水热法合成了云母蒙脱石,并与羟基铝齐聚物交联,DTA和IR结果表明,由于柱的引进,高温焙烧时层内八面体上羟基脱除变得较为容易。由NH3-TPD和吡啶吸附测得的表面酸性表明Al-CLS具有较SMM更多的弱酸和强酸中心。催化剂上弱酸中心有利于醇的脱水,而吸附在强酸中心上的NH3有利于醇的胺化。

关键词: 合成云母蒙脱石, 交联, 醇氨化反应

Abstract: Synthetic mica-montmoriilonite (SMM) was synthesized by using the hydrothertnal method. Pillared synthetic dioctahedral clays(Al-CLS) were prepared by crosslinking SMMwith hydroxyl aluminium oligomer between the layers. The results obtained by DTA and IRindicate that the dehydroxylation of octahedral hydroxyl group is easier at a high temperature calcination because of pillar introduced. The surface acidity of SMM and Al-CLSmeasured by NH3-TPDand pyridine adsorption showed that Al-CLSpresents even more sites of weaker and stronger acid than SMM. The dehydration-amination of ethanol with ammonia was studied over SMM and Al-CLSat 400℃ under ambient pressure. It is found that the weak acid sites on the surface favour the dehydration of ethanol and the NH3molecular adsorpted on the strong acid sites favour the amination of ethanol. The results from NH3-TPD, C2H5OH-TPD and estimation test showed that the reaction between NH3adsorpted on the strong acid sites and gas state C2H5OH perhaps occur in the amination of ethanol.

Key words: Synthetic mica-montmonllonite, Crosslinking, Animation of ethanol

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