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Dimerization of ethylene catalyzed by a nickel catalyst supported on porous polymers

✍ Scribed by Jean-Claude Carlu; Claude Caze

Publisher
Elsevier Science
Year
1990
Weight
830 KB
Volume
13
Category
Article
ISSN
0923-1137

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✦ Synopsis

We have tested the possibifity of using polymer-supported catalysts in a heterogeneous way (gas-solid) for the dimerization of ethylene. The catalyst is prepared by complexation of NiCI 2, by a phosphine group supported on a resin followed by reduction with AI(C2Hs)2CI. Good selectivity in butene synthesis has been achieved with a yield up to 80 % of but-l-ene. The formation of oligomers is observed, and these oligomers become embedded in the polymer support, giving rise to decrease of both the specific area and the pore volume. It is proposed that the embedding process causes the deactivation of the catalyst by coverage of the active sites and pore blockage. Correlation between the efficiency of the catalyst and the texture of the different supports is shown.

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