Ethylene oligomerization catalyzed by PNP/Cr(Ⅲ)/MAO in biphase systems

WANG Mei; SHI Pengfei; CHEN Yanhui; JIANG Tao

doi:10.3969/j.issn.0438-1157.2014.09.024

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Ethylene oligomerization catalyzed by PNP/Cr(Ⅲ)/MAO in biphase systems

更新时间：2025-12-10

- Ethylene oligomerization catalyzed by PNP/Cr(Ⅲ)/MAO in biphase systems
- CIESC Journal Issue 9, Pages: 3485-3489(2014)
- 作者机构：
  
  天津科技大学材料科学与化学工程学院,天津,300457
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.09.024
  CLC： Q316
- Online First：05 September 2014，
  
  Published：05 September 2014
- 稿件说明：
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WANG Mei, SHI Pengfei, CHEN Yanhui, et al. Ethylene oligomerization catalyzed by PNP/Cr(Ⅲ)/MAO in biphase systems[J]. CIESC Journal, 2014, (9): 3485-3489.
DOI：

WANG Mei, SHI Pengfei, CHEN Yanhui, et al. Ethylene oligomerization catalyzed by PNP/Cr(Ⅲ)/MAO in biphase systems[J]. CIESC Journal, 2014, (9): 3485-3489. DOI： 10.3969/j.issn.0438-1157.2014.09.024.

摘要

通过1-n-丁基-3-甲基咪唑六氟磷酸盐离子液体（[BMIM][PF6]）/环己烷构建了液/液两相体系。研究了两相体系内反应温度、Al/Cr摩尔比、离子液体浓度等因素对异丙基双膦胺配体（PNP）/Cr（Ⅲ）/甲基铝氧烷（MAO）催化乙烯齐聚性能的影响。研究结果表明：与均相催化体系相比，两相体系内PNP/Cr（Ⅲ）/MAO催化乙烯由四聚变为三聚，的选择性最高达到97.40%。齐聚产物存在于有机溶剂相，催化剂溶解在离子液体相，便于产物与催化剂的分离及催化剂的循环使用。

Abstract

1-n-Butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6])/cyclohexane biphasic system was used for studying performance of ethylene oligomerization catalyzed by diphosphinoamine ligand (PNP)/Cr(Ⅲ)/ methylaluminoxane(MAO). The effect of reaction temperature

molar ratio of Al/Cr and ionic liquid concentration on catalytic activity and product distribution was investigated. The results showed that compared with homogeneous catalysis system

the action of catalytic active center in biphase systems changed from ethylene tetramerization to ethylene trimerization. selectivity was up to 97.40%. The product existed in the organic solvent while the catalyst was dissolved in ionic liquids

which made the separation of product and recycle of catalyst easy.

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