Process for producing vanadium-arenes

US5093508A · kind A · utility

Assignee

• Enimont Anic S.r.l. · IT

Inventors

• Fausto Calderazzo · Pisa, IT
• Guido Pampaloni · Pontedera, IT
• Lucia Rocchi · Livorno, IT
• Angelo Moalli · Somma Lombardo, IT
• Francesco Masi · San Donato Milanese, IT
• Renzo Invernizzi · Milano, IT

Key dates

• Filing date: Jan 4, 1991
• Grant date: Mar 3, 1992
• Expiry date: Jan 4, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Vanadium-arenes EQU [V(arene).sub.2 ] wherein "arene" means benzene or mono-, di- or poly-(C.sub.1 -C.sub.5)-alkyl-substituted benzene, are prepared by means of a process which comprises: PA0 (a) forming a complex: EQU [V(arene).sub.2 ](+).AlCl.sub.4 (-) PA0 by reacting vanadium trichloride, aluminum metal and aluminum trichloride with one another, by operating in the presence of the selected arene; PA0 (b) treating the so obtained complex with an either cyclic or acyclic, liquid aliphatic ether to obtain the reduction of [V(arene).sub.2 ](+) to [V(arene).sub.2 ]; and PA0 (c) recovering the so separated vanadium-arene. The vanadium-arenes are useful in the preparation of catalysts for olefin polymerization.