Patents by Inventor Maria C. Cassani

Maria C. Cassani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Procedure for the production of vanadium bis-arenes from vanadium oxychloride
    Patent number: 5210244
    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.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: May 11, 1993
    Assignee: ECP Enichem Polimeri S.r.l.
    Inventors: Fausto Calderazzo, Guido Pampaloni, Francesco Masi, Angelo Moalli, Maria C. Cassani, Renzo Invernizzi