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US 4,284,748 AGranted
Olefin polymerization
AssigneePhillips Petroleum Company
InventorMelvin B. Welch
Life of this patent
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Abstract
Polymerization of olefins in the presence of a catalyst system comprising a titanium-containing composition associated with silica and a cocatalyst comprising a metal hydride or organic metal compound derived from an element of Groups I-III of the Periodic Table.
Claims15
A catalyst for the polymerization of olefins consisting essentially of two components wherein
- component A is formed in an inert hydrocarbon diluent by
- (1) reacting a silicon-containing finely divided solid in which the silica content ranges from about 80-100 weight percent with a tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms;
- (2) contacting the product obtained in step (1) with an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbon atoms;
- and
- (3) treating the product obtained in step (2) with a titanium tetrahalide;
- and
- component B is a metallic hydride or organometallic compound wherein said metal is selected from a metal of Groups IA, IIA, and IIIA of the Periodic Table.
4 more elements
A method of preparation of a polymerization catalyst which comprises forming a component A by sequentially reacting in an inert hydrocarbon diluent
- (1) a silicon-containing finely divided inorganic solid in which the silica content ranges from about 80 to 100 weight percent;
- (2) at least one tetravalent titanium alkoxide compound in which the alkyl group of the alkoxide contains from 1 to about 12 carbon atoms;
- (3) an organomagnesium compound wherein the organo portion is a hydrocarbyl group of 1 to about 12 carbons;
- and
- (4) a titanium tetrahalide;
- and then combining component A with component B which is a metallic hydride or organometallic compound wherein said metal is selected from a metal of Groups IA, IIA, and IIIA of the Periodic Table.
3 more elements
Dependencies are inferred from the claim text.