Catalyst for metathesis reactions of olefines and a method for preparing it as well as the metathesis reaction concerned
AssigneeNeste Oy
InventorsJukka Hietala, Pekka Knuuttila, Markku Leskela, Reijo Sillanpaa, Ari Lehtonen
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Abstract
The invention relates to a catalyst to be utilized in the metathesis reactions of olefines, the catalyst comprising an after-treated tungsten complex containing diol ligands and hydrocarbon ligands, which are benzenes substituted with a lower alkyl group. The invention also relates to a method for preparing a heterogenous catalyst to be used in the metathesis reaction of olefines as well as to a metathesis process for the conversion of olefines.
Claims17
Catalyst for metathesis reactions of olefines, said catalyst comprising a tungsten precursor complex with the structure W(ArCH.sub.2).sub.2 (diol).sub.2, wherein ArCH.sub.2 is benzene substituted with a lower alkyl group and said diol is 1,2-cyclohexane diol or pinacol, said tungsten precursor complex being impregnated in an inorganic carrier and calcinated.
A method for preparing a heterogenous catalyst for the metathesis reaction of olefines, which comprises;
- a) forming a complex between an inorganic tungsten salt and a diol,
- b) reacting the thus obtained complex with a benzyl anion or a benzyl anion substituted with a lower alkyl group, thus obtaining a tungsten complex containing diol ligands and benzyl ligands or benzyl ligands substituted with a lower alkyl group, and
- c) impregnating the thus obtained tungsten complex into a carrier and calcinating.
Dependencies are inferred from the claim text.