Vanadium tetrachloride stabilization
AssigneeExxon Chemical Patents Inc.
InventorsSudhin Datta, Trazollah Ouhadi
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Abstract
Solutions of VCl.sub.4 in inert organic solvent are stabilized by incorporation of decomposition retardants being halogenated organic compounds having at least two halogen atoms attached to the same carbon atom and activated by adjacent electron donor groups or carbon-carbon double bonds. One of the especially preferred stabilizers is butyl perchlorocrotonate. The solutions are useful in polymerization processes.
Claims26
A method of stabilizing a solution of vanadium tetrachloride in an inert organic solvent outside of a polymerization zone, which method comprises incorporating into the solution a decomposition-retarding amount of a halogenated organic compound having at least two halogen atoms attached to the same carbon atom, the halogen atoms being activated by an electron donor group adjacent the carbon atom to which they are attached and/or by a carbon-carbon double bond as a decomposition retardant for the vanadium tetrachloride, and excluding co-catalyst for the VCl.sub.4 therefrom.
A method of stabilizing a solution of vanadium tetrachloride in an inert organic solvent, outside of a polymerization zone, which method comprises incorporating into the solution a decomposition-retarding amount of a halogenated organic compound having at least two halogen atoms attached to the same carbon atom, the halogen atoms being activated by an electron donor group adjacent the carbon atom to which they are attached and/or by a carboncarbon double bond as a decomposition retardant for the vanadium tetrachloride wherein the decomposition retardant is incorporated in an amount of from 0.5 to 30 mol percent per mol of vanadium present in the solution and excluding co-catalyst therefrom.
Dependencies are inferred from the claim text.