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US 4,381,253 AGranted
Ultra high efficiency catalyst for polymerizing olefins
AssigneeThe Dow Chemical Company
InventorRandall S. Shipley
Life of this patent
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Abstract
Compositions consisting of the reaction product or complex resulting from the mixing of (1) a mixture of a transition metal compound such as a tetraalkoxy titanium compound and an alcohol and (2) an essentially non-reducing alkylating agent such as a dialkyl zinc compound are useful in the preparation of catalysts for polymerizing .alpha.-olefins having ultra-high efficiencies at high polymerization temperatures.
Claims15
A reaction product or complex formed from the admixture of
- (a) a reaction product or complex formed from a mixture of
- (i) at least one transition metal compound represented by the empirical formulae Tm(OR).sub.y X.sub.x-y, TmOX.sub.x-2 or Tm(OR).sub.x-2 O wherein Tm is a transition metal selected from groups IVB, VB or VIB;
- each R is independently a hydrocarbyl group having from 1 to about 20 carbon atoms;
- each X is independently a halogen;
- x has a value equal to the valence of Tm and y has a value from 1 to the valence of Tm;
- and
- (ii) at least one non-metallic oxygen-containing compound selected from the group consisting of molecular oxygen, alcohols, ketones, aldehydes, carboxylic acids, esters of carboxylic acids, peroxides, water and mixtures thereof;
- and
- (b) an essentially non-reducing alkylating agent represented by the empirical formula R.sub.2 Zn or RZnX wherein X is a halogen and each R is independently an alkyl group having from 1 to about 20 carbon atoms;
- and wherein components (a) and (b) are mixed in proportions such that the atomic ratio of Zn:Tm is from about 0.1:1 to about 10:1 and the atomic ratio of O:Tm is from about 0.1:1 to about 4:1 and wherein such admixture is evidenced by a color change.
7 more elements
A catalytic reaction product of
- (A) a reaction product or complex formed from the admixture of
- (1) a reaction product or complex formed by mixing
- (a) at least one transition metal compound represented by the empirical formulae Tm(OR).sub.y X.sub.x-y, TmOX.sub.x-2 or Tm(OR).sub.x-2 O wherein Tm is a transition metal selected from groups IVB, VB or VIB;
- each R is independently a hydrocarbyl group, having from 1 to about 20 carbon atoms;
- each X is independently a halogen;
- x has a value equal to the valence of Tm and y has a value from 1 to the valence of Tm;
- and
- (b) at least one oxygen-containing compound selected from the group consisting of molecular oxygen, alcohols, ketones, aldehydes, carboxylic acids, esters of carboxylic acids, peroxides, water and mixtures thereof;
- and
- (2) at least one non-reducing alkylating agent represented by the empirical formulae ZnR.sub.2 or RZnX wherein X is a halogen, preferably chlorine or bromine and each R is independently an alkyl group having from 1 to about 20 carbon atoms;
- (B) a magnesium halide resulting from the reaction of
- (1) an organomagnesium compound represented by the empirical formula MgR".sub.2.xMR".sub.y wherein M is aluminum or zinc, each R" is independently a hydrocarbyl or hydrocarbyloxy group having from 1 to about 20 carbon atoms, x has a value from zero to 10 and y has a value corresponding to the valence of M;
- with
- (2) a halide source selected from
- (a) an active non-metallic halide, said non-metallic halide corresponding to the empirical formula R'X wherein R' is hydrogen or a hydrocarbyl group such that the hydrocarbyl halide is at least as active as sec-butyl chloride and does not poison the catalyst and X is halogen or
- (b) a metallic halide corresponding to the empirical formula MR.sub.y-a X.sub.a wherein M is a metal of Group IIIA or IVA of Mendeleev's Periodic Table of Elements, R is a monovalent hydrocarbyl radical, X is halogen, y is a number corresponding to the valence of M and a is a number of 1 to y;
- and
- (C) when the organomagnesium component and/or the halide source provides insufficient quantities of aluminum, an aluminum compound is added which is represented by the empirical formula AlR.sub.y' X.sub.y" wherein R and X are as defined above and y' and y" each have a value of from zero to three with the sum of y' and y" being three;
- and
- wherein the components are employed in quantities which provide an atomic ratio of the elements Mg:Tm of from about 1:1 to about 200:1, Zn:Tm of from about 0.1:1 to about 10:1;
- O:Tm of from about 0.1:1 to about 4:1;
- Al:Tm of from about 0.1:1 to about 200:1 and an excess X:Al of from about 0.0005:1 to about 5:1.
19 more elements
In a catalyst composition comprising a magnesium halide, a transition metal compound and a zinc compound, said composition having an atomic ratio of the elements Mg:Tm of from about 1:1 to about 200:1;
- Zn:Tm of from about 0.1:1 to about 10:1;
- Al:Tm of from about 0.1:1 to about T200:1 and an excess X:Al of from about 0.0005:1 to about 5:1;
- the improvement which comprises forming a reaction product or complex of (1) a mixture of the transition metal compound and an oxygen-containing compound selected from the group consisting of molecular oxygen, alcohols, ketones, aldehydes, carboxylic acids, esters of carboxylic acids, peroxides, water and mixtures thereof in quantities so as to provide an atomic ratio of O:Tm of from about 0.1:1 to about 4:1;
- and (2) the zinc compound prior to preparation of the catalyst therefrom.
1 more element
Dependencies are inferred from the claim text.