中国炼油与石油化工 ›› 2014, Vol. 16 ›› Issue (01): 45-51.

• Catalyst Research • 上一篇    下一篇

二氧化硅负载Cr(acac)3/PNP催化剂的制备及其催化乙烯四聚反应性能研究

邵怀启1,李亚飞1,高祥录1,张宝军2,义建军2,姜涛1,李健1   

  1. 1. 天津科技大学
    2. 中国石油石油化工研究院
  • 收稿日期:2013-09-26 修回日期:2013-11-09 出版日期:2014-03-30 发布日期:2014-03-30
  • 通讯作者: 姜涛 E-mail:jiangtao@tust.edu.cn
  • 基金资助:
    自然科学基金

Preparation and Catalytic Performance of Silica-supported Cr(acac)3/PNP for Ethylene Tetramerization

Huaiqi Shao1,Yafei Li1,Xianglu Gao1,Baojun Zhang2,Jianjun Yi2,Tao Jiang1,Jian Li1   

  1. 1. Tianjin University of Science & Technology
    2. Petrochemical Research Institute, PetroChina Company Limited,
  • Received:2013-09-26 Revised:2013-11-09 Online:2014-03-30 Published:2014-03-30
  • Contact: Tao Jiang E-mail:jiangtao@tust.edu.cn

摘要: 采用乙酰丙酮铬和双(二苯膦基)异丙胺原位络合并负载在甲基铝氧烷修饰的二氧化硅上制备了负载型催化剂。详细研究了催化剂的结构和反应温度、反应压力、Al/Cr摩尔比对乙烯四聚反应性能的影响。铬催化剂均匀、牢固地负载在载体上并且不会被反应体系中的甲基铝氧烷洗脱下来。以甲基铝氧烷为助催化剂,在80℃、2MPa、Al/Cr为300的反应条件下,负载催化剂催化乙烯四聚的活性达到1.70´107 g mol Cr-1 h-1。负载催化剂具有较好的高温耐受性能。

关键词: 乙烯四聚, 1-辛烯, Cr(acac)3/PNP, 负载催化剂

Abstract: Chromium acetylacetonate and bis(diphenylphosphino)isopropylamine were coordinated in situ and supported on methylaluminoxane-modified silica. The catalyst structure and effects of reaction temperature, reaction pressure and Al/Cr mole ratio on ethylene tetramerization were investigated in detail. The chromium was uniformly and firmly immobilized on the support and did not be leached off by methylaluminoxane. The supported complex, upon activation with methylaluminoxane, exhibited catalytic activity of 1.70?107 g mol Cr-1 h-1 for ethylene tetramerization toward 1-octene at reaction temperatures of 80?C, pressure of 2.0 MPa and Al/Cr mole ratio of 300. The supported catalyst presented the good tolerance of high temperature.

Key words: Ethylene tetramerization, 1-Octene, Cr(acac)3/PNP, Supported catalyst