US4252670A
Expired / Lapsed
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Olefine polymerization catalyst
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-03-26
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Granted: 1981-02-24
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Expires: 1999-03-26
Abstract
Abstract A component of a polymerization catalyst is prepared by reacting an organo-magnesium compound, or a complex with an organo-aluminium compound, with an halogenating agent such as silicon tetrachloride or hydrogen chloride, and then reacting the product with a Lewis Base compound, particularly an ester and finally with titanium tetrachloride. The product obtained is combined with an organo-aluminium compound preferably together with a Lewis Base and used to polymerize an olefine monomer. The catalyst has a high activity and is stereospecific.
Inventors
- 👤 Anthony D. Caunt
- 👤 Paul D. Gavens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:21
CPC Classifications
C; C08; C08F; C08F10/00; C08F110/00; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A process for the production of a composition suitable for use as a component of an olefine polymerisation catalyst, which process comprises treating a magnesium hydrocarbyl compound, or a complex or mixture of a magnesium hydrocarbyl compound and an aluminium hydrocarbyl compound, with at least one halogenating agent, adding to the reaction product a Lewis Base compound, and then adding titanium tetrachloride.
Claim 2
Dependent Claim
62 words
A process for the production of a composition suitable for use as a component of an olefine polymerisation catalyst, which process comprises treating a magnesium hydrocarbyl compound, or a complex or mixture of a magnesium hydrocarbyl compound and an aluminium hydrocarbyl compound, with at least one halogenating agent, adding to the reaction product a Lewis Base compound, and then adding titanium tetrachloride.
Claim 3
Dependent Claim
48 words
The process of claim 1 wherein the treatment with the at least one halogenating agent is carried out by treating a liquid medium which contains the magnesium hydrocarbyl compound or the complex or mixture of the magnesium hydrocarbyl compound and an aluminium hydrocarbyl compound with the halogenating agent.
Claim 4
Dependent Claim
65 words
The process of claim 1 wherein the magnesium hydrocarbyl compound or the mixture or complex thereof with an aluminium hydrocarbyl is selected from compounds of the formulae (A) MgR 2 ; (B) MgR 2 aAlR 3 ; and (C) MgR 2 +aAlR 3 where each R, which may be the same or different, is a hydrocarbyl group; and a has a value up to 2.
Claim 5
Dependent Claim
123 words
The process of claim 1 wherein the at least one halogenating agent, which is not a titanium tetrahalide, is a hydrogen halide, a silicon halide of the formula R.sub.b.sup.1 SiX.sub.(4-b), a carboxylic acid halide of the formula R.sup.2 COX, a hydrocarbyl halide of the formula R.sup.3 X.sub.c, phosphorus pentachloride, thionyl chloride, sulphuryl chloride, phosgene, nitrosyl chloride, a halide of mineral acid, chlorine, bromine, a chlorinated polysiloxane, a hydrocarbyl aluminium halide, aluminium chloride or ammonium hexafluorosilicate, wherein R 1 is hydrogen or a hydrocarbyl group; R 2 is a hydrocarbyl group; R 3 is a hydrocarbyl residue; X is as a halogen atom; b is 0 or an integer from 1 up to 3; and c is an integer from 1 up to 10.
Claim 6
Dependent Claim
38 words
The process of claim 3 wherein the quantity of the at least one halogenating agent is sufficient to provide at least 0.1 halogen atom for every group R present in the compound of formula (A), (B) or (C).
Claim 7
Dependent Claim
41 words
The process of claim 1 wherein the Lewis Base is an ester of the formula R.sup.4 COOR.sup.5 wherein R 4 is an aryl group which may be substituted by one or more hydrocarbyloxy groups; and R 5 is an alkyl group.
Claim 8
Dependent Claim
34 words
The process of claim 1 wherein the Lewis Base is used in an amount of from 0.1 up to 0.8 mole for each gramme atom of magnesium which is present in the reaction product.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the amount of titanium tetrachloride is in molar excess relative to the magnesium present in the solid material.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein the product is separated and washed between each stage of the reaction.
Claim 11
Dependent Claim
61 words
An olefine polymerisation catalyst which comprises (1) the reaction product obtained by the process of claim 1; and (2) an organic compound of a metal of Group IIA of the Periodic Table or of aluminium or a complex of an organo-metallic compound of a metal of Group IA or Group IIA of the Periodic Table with an organic compound of aluminium.
Claim 12
Dependent Claim
49 words
The catalyst of claim 10 wherein component (2) is an aluminium trihydrocarbyl compound and the catalyst also includes an ester of the formula R.sup.4 COOR.sup.5 wherein R 4 is an aryl group which may be substituted by one or more hydrocarbyloxy groups; and R 5 is an alkyl group.
Claim 13
Dependent Claim
28 words
The process of claim 1, wherein said Lewis Base compound is an organic Lewis Base which affects either the activity or stereospecificity of a Ziegler polymerisation catalyst system.
Claim 14
Dependent Claim
28 words
The process of claim 4, wherein said Lewis Base compound is an organic Lewis Base which affects either the activity or stereospecificity of a Ziegler polymerisation catalyst system.
Claim 15
Dependent Claim
71 words
The process of claim 13, wherein said Lewis Base compound is selected from the group consisting of an ether, an ester, a ketone, an alcohol, a thioether, a thioester, a thioketone, a thiol, a sulphone, a sulphonamide, a fused ring compound containing a heterocyclic sulphur atom, an organo-silicon compound, an amide, urea and the substituted derivatives thereof, thiourea, an alkanolamine, an amine, a cyclic amine a diamine and an organo-phosphorus compound.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |