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US 4,284,526 AGranted
Process for the polymerization of alpha-olefins, catalyst employed in said process and method for the preparation thereof
AssigneeSnamprogetti S.p.A.
InventorsSebastiano Cesca, Alberto Greco, Guglielmo Bertolini, Mario Bruzzone
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Abstract
An alpha-olefin such as ethylene is polymerized in the presence of a catalyst system consisting of (1) an alkyl-halide, alkyl-derivative or hydride of a metal belonging to one of the first three groups of the periodic system and (2) the combination product of a transition metal chloride and titanium trichloride, supported on a previously chlorinated material such as chlorinated .alpha.-alumina having a high superficial area.
Claims9
Catalyst for the polymerization of alpha-olefins consisting of
- (a) A member of the group consisting of alkyl-halides, alkyl-derivatives and hydrides of the metals belonging to the first three groups of the Periodic System, and
- (b) the combination product of titanium trichloride and a chloride of another transition metal, derived from the reaction of TiCl.sub.4 and a carbonyl compound of said other transition metal, finely dispersed and carried on a material of high superficial area selected from the group consisting of the chlorinated oxides of the elements belonging to the 2nd to 4th groups of the Periodic System and which has been previously chlorinated.
Dependencies are inferred from the claim text.