Procedure for the production of vanadium bis-arenes from vanadium oxychloride

Abstract

A procedure is described for the preparation of a vanadium bis-arene, [V(arene).sub.2 ], starting from vanadium oxychloride, aluminium metal, aluminium trichloride and an arene, wherein: (a) vanadium oxychloride (VOCl.sub.3), active aluminium metal, and aluminium trichloride are put in contact with each other, in a liquid arene, to transform the vanadium oxychloride into the complex compound [V(arene).sub.2 ].sup.+ [AlCl.sub.4 ].sup.- ; (b) a liquid cyclic or acyclic or acyclic ether is added to the reaction product of step (a) to reduce [V(arene).sub.2 ].sup.+ to [V(arene).sub.2 ]; and (c) the vanadium bis-arene [V(arene).sub.2 ] is recovered from the reacton product of step (b). The vanadium bis-arenes thus obtained are use in the preparation of catalysts for the polymerization of olefins.

Dependencies are inferred from the claim text.