US4250284A
Expired / Lapsed
US
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Process and catalyst components for the polymerization and the copolymerization of olefins
Assignee: Solvay SA
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Filing: 1975-02-24
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Granted: 1981-02-10
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Expires: 1995-02-24
Abstract
Abstract Polymerization and copolymerization is carried out in the presence of an improved transition metal based catalyst. The catalyst is obtained by activating with an organometallic compound, the solid product which results from the reaction of a halogen containing transition metal compound with an alkoxy metal compound of the formula X m-n M(OR) n wherein M is at least one metal selected from the elements of Groups Ia, IIa, IIb, IIIa and VIIb of the Periodic Table, X is a monovalent inorganic radical, R is a monovalent hydrocarbon radical, m is the valence of M and n is an integer such that 1 ≦ n ≦ m.
Inventors
- 👤 Andre Delbouille
- 👤 Jean L. Derroitte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:54
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
In a process for the polymerization or copolymerization of olefins in the presence of a catalyst consisting essentially of a trialkylaluminum and a solid catalyst component having at least at the surface thereof groups derived from the compound titanium tetrachloride, the improvement which comprises carrying out said polymerization or copolymerization in the presence of a catalyst wherein the solid catalyst component is obtained by reacting a titanium tetrachloride with a magnesium dialkoxide in the absence of solvent and at a temperature higher than ambient temperature, separating the solid component formed from the reaction medium and washing the same with an inert solvent until the solvent is free from all traces of chlorine, and wherein the trialkylaluminum compound is present in a molar excess of at least 2 with respect to the titanium metal present in the solid catalyst component.
Claim 2
Dependent Claim
139 words
In a process for the polymerization or copolymerization of olefins in the presence of a catalyst consisting essentially of a trialkylaluminum and a solid catalyst component having at least at the surface thereof groups derived from the compound titanium tetrachloride, the improvement which comprises carrying out said polymerization or copolymerization in the presence of a catalyst wherein the solid catalyst component is obtained by reacting a titanium tetrachloride with a magnesium dialkoxide in the absence of solvent and at a temperature higher than ambient temperature, separating the solid component formed from the reaction medium and washing the same with an inert solvent until the solvent is free from all traces of chlorine, and wherein the trialkylaluminum compound is present in a molar excess of at least 2 with respect to the titanium metal present in the solid catalyst component.
Claim 3
Dependent Claim
26 words
The process of polymerization or copolymerization according to claim 1 wherein the olefin is selected from the group consisting of ethylene, ethylene-propylene mixtures and ethylene-butene-1 mixtures.
Claim 4
Dependent Claim
80 words
In a process for the polymerization or copolymerization of olefins in the presence of a catalyst comprising a trialkylaluminum and a solid catalyst component, the improvement which comprises carrying out said polymerization or copolymerization in the presence of a catalyst wherein the solid catalyst component is obtained by reacting titanium tetrachloride with magnesium dialkoxide in the absence of moisture and solvent and at a temperature higher than ambient temperature and the medium for said reaction being said pure titanium tetrachloride.
Claim 5
Dependent Claim
80 words
In a process for the polymerization or copolymerization of olefins in the presence of a catalyst comprising a trialkylaluminum and a solid catalyst component, the improvement which comprises carrying out said polymerization or copolymerization in the presence of a catalyst wherein the solid catalyst component is obtained by reacting titanium tetrachloride with magnesium dialkoxide in the absence of moisture and solvent and at a temperature higher than ambient temperature and the medium for said reaction being said pure titanium tetrachloride.
Claim 6
Dependent Claim
22 words
The process according to claim 3 wherein the olefin is selected from the group consisting of ethylene, ethylenepropylene mixtures and ethylene-butene-1 mixtures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |