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US4434083A
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Process of preparing a catalyst component and polymerization of α-olefins with such a catalyst component
Assignee: Stamicarbon BV
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Filing: 1982-08-05
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Granted: 1984-02-28
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Expires: 2002-08-05
Abstract
Abstract This invention discloses a process of preparing a catalyst component for the polymerization of α-olefins. An organomagnesium compound is deposited on an inert inorganic support, such as silica, and the product obtained is heated at a temperature of 300°-1000° C. in a non-reducing atmosphere. The support is then combined with one or more compounds of titanium and/or vanadium. The process of polymerizing α-olefins with the catalysts of this invention is also disclosed.
Inventors
- 👤 Lambertus J. M. A. VAN DE Leemput
- 👤 Godefridus A. H. Nooijen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:03
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A process for preparing a Ziegler-type catalyst for the polymerization of α-olefins, comprising: a. forming a catalyst component by combining a particulate inorganic support with a solution of an organomagnesium compound; b. heating said catalyst component in a non-reducing atmosphere at a temperature of 300°-1000° C.; and c. forming the catalyst by combining the thus heat-treated catalyst component with at least one compound of one or more transition metals selected from the group consisting of titanium and vanadium.
Claim 2
Dependent Claim
78 words
A process for preparing a Ziegler-type catalyst for the polymerization of α-olefins, comprising: a. forming a catalyst component by combining a particulate inorganic support with a solution of an organomagnesium compound; b. heating said catalyst component in a non-reducing atmosphere at a temperature of 300°-1000° C.; and c. forming the catalyst by combining the thus heat-treated catalyst component with at least one compound of one or more transition metals selected from the group consisting of titanium and vanadium.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said particulate inorganic support is silica, alumina, or a mixture thereof.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein said organomagnesium compound has the formula MgR 2 , wherein each R is independently a hydrocarbyl group having 1-30 carbon atoms.
Claim 5
Dependent Claim
17 words
The process of claim 3 wherein each R is independently an alkyl group having 4-10 carbon atoms.
Claim 6
Dependent Claim
15 words
Process of claim 1 wherein said transition metal is substantially present in its highest valence.
Claim 7
Dependent Claim
21 words
Process of claim 1 or 5 wherein said transition metal compounds are chosen from the group comprising halides, alkoxides, and alkoxyhalides.
Claim 8
Dependent Claim
25 words
Process of claim 1 wherein said transition metal compounds is a member of the group comprising titanium tetrachloride, vanadium tetrachloride, vanadyl trichloride, and dialkoxyvanadium dichlorides.
Claim 9
Dependent Claim
16 words
Process of claim 1 wherein said catalyst component contains 0.5 to 10% by weight of magnesium.
Claim 10
Dependent Claim
18 words
Process of claim 1 or 8 wherein said catalyst contains 0.5 to 10% by weight of transition metal.
Claim 11
Dependent Claim
22 words
Process of claim 8 wherein the atomic ratio of magnesium to total transition metals in the catalyst is between 0.1:1 and 20:1.
Claim 12
Dependent Claim
17 words
A catalyst prepared by the process of any of claims 1, 2, 3, 4, 7 or 8.
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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |