| Ethylene tetramerization with a highly active and long-lifetime trinuclear diphenylphosphinoamine/Cr（III）/MAO catalyst |
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| 作者姓名： | JIANG Tao TAO YiQing GAO XiangLu MAO GuoLiang CHEN HongXia CAO ChenGang NING YingNan |
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| 作者单位： | [1]College of Material Science and Chemical Engineering, Tianjin University of Science ＆ Technology, Tianjin 300457, China [2]Department of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China |
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| 基金项目： | We thank Dr. Zhi Ma for helpful discussions. This work was supported by the National Natural Science Foundation of China （Ul162114） and the Program for New Century Excellent Talents in University and the Program for New Century Excellent Talents in Heilongjiang Provincial University （NCET-06-010） and the Science Foundation of Tianjin University of Science ＆ Technology （20090420）, |
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| 摘 要： | The synthesis and characterization of a novel trinuclear diphosphinoamine ligand 2 are reported. The ligand combined with Cr(III), activated with methylaluminoxane, lead to highly active and long-lifetime catalytic systems for the tetramerization of ethylene to form 1-octene. The effects of reaction temperature, reaction pressure, molar ratio of Al/Cr and bis(diphenylphosphino)amine/Cr on the catalytic activity and product selectivity were studied. Compared with its mononuclear analogue 1, ligand 2 showed a higher catalytic activity and longer lifetime for ethylene tetramerization in the presence of methylaluminoxane as cocatalyst. High molecular weight polyethylene was generated as a by-product with extremely broad molecular weight distributions.
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| 关 键 词： | ethylene tetramerization 1-octene trinuclear diphenylphosphinoamine |
Ethylene tetramerization with a highly active and long-lifetime trinuclear diphenylphosphinoamine/Cr(III)/MAO catalyst |
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| JIANG Tao,TAO YiQing,GAO XiangLu,MAO GuoLiang,CHEN HongXia,CAO ChenGang,NING YingNan.Ethylene tetramerization with a highly active and long-lifetime trinuclear diphenylphosphinoamine/Cr(III)/MAO catalyst[J].Chinese Science Bulletin,2012,57(13):1510-1515. |
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| Authors: | Tao Jiang YiQing Tao XiangLu Gao GuoLiang Mao HongXia Chen ChenGang Cao YingNan Ning |
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| Institution: | 2 Department of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China |
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| Abstract: | The synthesis and characterization of a novel trinuclear diphosphinoamine ligand 2 are reported. The ligand combined with Cr(III), activated with methylaluminoxane, lead to highly active and long-lifetime
catalytic systems for the tetramerization of ethylene to form 1-octene. The effects of reaction temperature, reaction pressure,
molar ratio of Al/Cr and bis(diphenylphosphino)amine/Cr on the catalytic activity and product selectivity were studied. Compared
with its mononuclear analogue 1, ligand 2 showed a higher catalytic activity and longer lifetime for ethylene tetramerization in the presence of methylaluminoxane
as cocatalyst. High molecular weight polyethylene was generated as a by-product with extremely broad molecular weight distributions. |
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| Keywords: | ethylene tetramerization 1-octene trinuclear diphenylphosphinoamine |
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