US 4,340,502 A · Transition metal composition

Abstract

A transition metal composition has the formula: TiCl.sub.3 (AlR.sub.x X.sub.3-x).sub.n E.sub.a L.sub.b where E is an ether or thioether; L is an organic phosphorus-containing Lewis Base; and a and b are each greater than 0.001 and not more than 0.50. The composition has a low surface area, typically less than 50 m.sup.2 /g. The composition can be prepared by reacting titanium tetrachloride with an organoaluminium compound, optionally heating the reaction product, contacting the reaction product at an elevated temperature with at least one of E and L and washing the product subsequent to the contacting with E. In the composition, E is conveniently di-n-butyl ether or di-isoamyl ether and L can be an organic phosphine, phosphine oxide, phosphite or phosphate. The composition can be used in a polymerization catalyst to polymerize or copolymerize olefine monomers. Copolymers having an advantageous combination of low temperature brittle point and Flexural Modulus are disclosed.

Claims16

Dependent claims

A process for the production of a titanium trichloride-containing composition which process comprises

(1) reducing titanium tetrachloride by reacting the titanium tetrachloride with a reducing agent under conditions to give a solid titanium trichloride product which includes an associated aluminium compound containing aluminium and chlorine atoms, wherein the titanium trichloride is formed predominantly in the beta-form;
(2) contacting a suspension of the solid reduction product with compound E and compound L either simultaneously or sequentially, at least part of the contacting being effected while maintaining the suspension at a temperature of at least 60.degree. C. in the presence of at least compound E or compound L;
and
(3) subsequent to the contacting with the compound E washing the solid product obtained with an inert hydrocarbon or inert halohydrocarbon liquid
wherein
E is an ether or a thioether;
L is an organic phosphorus-containing Lewis Base
compound of the general formula:
R.sup.3 R.sup.4 R.sup.5 P(O).sub.m
where
R.sup.3 is a hydrocarbyl, or a hydrocarbyloxy group wherein the hydrocarbyl group contains up to 18 carbon atoms;
R.sup.4 and R.sup.5 which may be the same or different, are each a hydrogen atom or a gorup R.sup.3 ;
and
m is 0 or 1.

11 more elements

Dependencies are inferred from the claim text.

Transition metal composition

Life of this patent

Transition metal composition

Life of this patent

Abstract

Claims16