Biphasic oligomerization of ethylene with nickel complexes immobilized in organochloroaluminate ionic liquids |
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| Authors: | Lixia Pei Xianmei Liu Haiyang Gao Qing Wu |
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| Institution: | 1. DSAPM Laboratory, Institute of Polymer Science, School of Chemistry and Chemical Engineering, Sun Yat‐Sen (Zhongshan) University, Guangzhou 510275, China;2. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Ethylene was selectively oligomerized by nickel complexes such as (PPh3)2NiBr2 and (PPh3)2NiCl2 immobilized in chloroaluminate ionic liquid in biphasic catalytic reactions. The influence of reaction parameters such as reaction media, reaction temperature and Et2AlCl:Ni molar ratio was also evaluated. Turnover frequency up to 24000 mol C2H4/(mol Ni h) was achieved under mild reaction conditions (0.5 atm and 40 °C). GC‐MS analyses showed that the obtained oligomers completely consist of C4 and C6. The olefinic products can be easily separated from the catalytic ionic liquid phase by simple decantation, and the nickel catalyst can be reused without a significant decrease in turnover frequency and change of the distribution of the olefinic products. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | ethylene oligomerization biphasic catalysis nickel catalyst ionic liquid |
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