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US4315835A
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Components of catalysts for polymerizing alpha-olefins and the catalysts formed from the components
Assignee: Montedison SpA
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Filing: 1980-05-07
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Granted: 1982-02-16
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Expires: 2000-05-07
Abstract
Abstract New components of catalysts for polymerizing alpha-olefins, and the catalysts formed from the new components are disclosed. Said catalyst components are prepared by reacting Ti compounds with a carrier in the form of spheroidal particles of specified characteristics and which consists of or comprises an Mg compound, or mixture of Mg compounds of the formula XnMg(OR)2-n (I) in which 0</=n</=2, R is an alkyl, aryl, cycloalkyl radical containing from 1 to 20 carbon atoms, X is halogen or a group OR' in which R' is an alkyl, aryl or cycloalkyl radical containing from 1 to 20 carbon atoms and is the same or different from R in formula (I).
Inventors
- 👤 Umberto Scata'
- 👤 Luciano Luciani
- 👤 Pier C. Barbe'
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:38
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022; Y; Y10; Y10S; Y10S526/00; Y10S526/908
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
Process for preparing a carrier for components of catalysts for the polymerization of olefins and having the formula X.sub.n Mg(OR).sub.2-n in which n is about 2, R is an alkyl, aryl or cycloalkyl radical containing from 1 to 20 carbon atoms, and X is a halogen atom, which process comprises reacting a Mg compound having the formula X.sub.n MgR.sub.2-n in which O≦n<2, R is an alkyl, aryl or cycloalkyl radical containing from 1 to 20 carbon atoms and X is a halogen atom, with an ester of orthosilicic acid, in the presence of a halogenating substance.
Claim 2
Dependent Claim
96 words
Process for preparing a carrier for components of catalysts for the polymerization of olefins and having the formula X.sub.n Mg(OR).sub.2-n in which n is about 2, R is an alkyl, aryl or cycloalkyl radical containing from 1 to 20 carbon atoms, and X is a halogen atom, which process comprises reacting a Mg compound having the formula X.sub.n MgR.sub.2-n in which O≦n<2, R is an alkyl, aryl or cycloalkyl radical containing from 1 to 20 carbon atoms and X is a halogen atom, with an ester of orthosilicic acid, in the presence of a halogenating substance.
Claim 3
Dependent Claim
9 words
The carrier prepared by the process of claim 1.
Claim 4
Dependent Claim
28 words
Components of catalysts for polymerizing olefins obtained by reaction of a titanium halide with a carrier comprising a Mg compound and obtained by the process of claim 1.
Claim 5
Dependent Claim
41 words
Components of catalysts for polymerizing olefins obtained by reaction of a titanium halide with a carrier comprising a Mg compound and obtained by the process of claim 1 in which, in the formula X n Mg(OR) 2-n , X is chlorine.
Claim 6
Dependent Claim
41 words
Components of catalysts for polymerizing olefins obtained by reaction of a titanium halide with a carrier comprising a Mg compound and obtained by the process of claim 1 in which, in the formula X n Mg(OR) 2-n , X is bromine.
Claim 7
Dependent Claim
18 words
The process of claim 1, in which, in the formula X n Mg(OR) 2-n , X is chlorine.
Claim 8
Dependent Claim
18 words
The process of claim 1, in which, in the formula X n Mg(OR) 2-n , X is bromine.
Claim 9
Dependent Claim
18 words
The process of claim 1, in which, in the formula X n MgR 2-n , X is chlorine.
Claim 10
Dependent Claim
18 words
The process of claim 1, in which in the formula X n MgR 2-n , X is bromine.
Claim 11
Dependent Claim
41 words
Components of catalysts for polymerizing olefins obtained by reaction of a titanium halide with a carrier comprising a Mg compound and obtained by the process of claim 1 in which, in the formula X n MgR 2-n , X is chlorine.
Claim 12
Dependent Claim
41 words
Components of catalysts for polymerizing olefins obtained by reaction of a titanium halide with a carrier comprising a Mg compound and obtained by the process of claim 1 in which, in the formula X n MgR 2-n , X is bromine.
References Cited (Backward Citations)
US4220554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |