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US 4,378,304 AGranted
Catalyst and methods
AssigneeChemplex Company
InventorRobert A. Dombro
Life of this patent
Estimating the term…
Abstract
A catalyst, a method of preparing a catalyst and method of polymerizing olefins with the catalyst in which the catalyst is prepared by reacting a support with a Group IIA organometallic compound essentially free of aluminum alkyls and reacting this product with water or a hydrocarbyl alcohol, then reacting this product with, for example, titanium tetrachloride, followed if necessary by removing unreacted ingredients and finally activating by contacting with a cocatalyst in the absence of oxygen and moisture.
Claims44
A catalyst prepared by the method comprising:
- (1) reacting a finely divided, difficultly reducible, porous support with
- (2) a Group IIA organometallic compound essentially free of aluminum alkyls, then reacting the resulting product with
- (3) water or a hydrocarbyl alcohol in a molar ratio to the compound of step (2) of from 0.5 to 1 to 4 to 1, then reacting the product of this with
- (4) a Group IVB and/or VB transition metal halide or oxyhalide,
- (5) removing essentially all unreacted components and by-products from the reactions of steps (1), (2), (3) and (4), followed by
- (6) activating the resulting reaction product by treating in the substantial absence of air with a cocatalyst that is either hydrogen or a Group IA, IIA, IIIA or IIB organometallic compound or mixture of two or more of these.
3 more elements
The method of preparing an active polymerizing catalyst comprising:
- (1) reacting a finely divided, difficulty reducible, porous support with
- (2) a Group IIA organometallic compound essentially free of aluminum alkyls, then reacting the resulting product with
- (3) water or a hydrocarbyl alcohol in a molar ratio to the compound of step (2) of from 0.5 to 1 to 4 to 1, then reacting the product of this with
- (4) a Group IVB and/or VB transition metal halide or oxyhalide,
- (5) removing essentially all unreacted components and by-products from the reactions of steps (1), (2), (3) and (4), followed by
- (6) activating the resulting reaction product by treating in the substantial absence of air with a cocatalyst that is either hydrogen or a Group IA, IIA, IIIA or IIB organometallic compound or mixture of two or more of these.
3 more elements
Dependencies are inferred from the claim text.