US4169927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of ethylene
Assignee: Chevron USA Inc
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Filing: 1977-10-13
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Granted: 1979-10-02
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Expires: 1997-10-13
Abstract
Abstract A novel process is provided for the polymerization of ethylene in which the polymerization catalyst employed in the process is the reaction product of a vanadium ion-exchanged montmorillonite clay and an organometallic compound of a metal of Group II-A, II-B, or III-A of the Periodic Table.
Inventors
- 👤 Robert W. Hill
- 👤 Thomas J. Lynch
- 👤 Peter M. Wisneski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:08
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A process for the polymerization of ethylene which consists essentially of contacting ethylene with a polymerization catalyst which is the reaction product of a vanadium ion-exchanged montmorillonite clay and an organometallic compound of a metal of Group II-A, II-B, or III-A of the Periodic Table; said vandium ion-exchanged montmorillonite clay having been prepared by treating a montmorillonite clay with an aqueous solution of vanadyl sulfate until said clay has incorporated therein, by ion-exchange, at least 3 weight % of vanadium (on a dry weight basis), washing said clay free of occluded ions, and drying said vanadium ion-exchanged clay.
Claim 2
Dependent Claim
98 words
A process for the polymerization of ethylene which consists essentially of contacting ethylene with a polymerization catalyst which is the reaction product of a vanadium ion-exchanged montmorillonite clay and an organometallic compound of a metal of Group II-A, II-B, or III-A of the Periodic Table; said vandium ion-exchanged montmorillonite clay having been prepared by treating a montmorillonite clay with an aqueous solution of vanadyl sulfate until said clay has incorporated therein, by ion-exchange, at least 3 weight % of vanadium (on a dry weight basis), washing said clay free of occluded ions, and drying said vanadium ion-exchanged clay.
Claim 3
Dependent Claim
14 words
The process of claim 1 in which the organometallic compound is an aluminum alkyl.
Claim 4
Dependent Claim
72 words
A polymerization catalyst consisting essentially of the reaction product of a vanadium ion-exchanged montmorillonite clay and an aluminum alkyl; said vanadium ion-exchanged montmorillonite clay having been prepared by treating a montmorillonite clay with an aqueous solution of vanadyl sulfate until said clay has incorporated therein, by ion-exchange, at least 3 weight % of vanadium (on a dry weight basis), washing said clay free of occluded ions, and drying said vanadium ion-exchanged clay.
Claim 5
Dependent Claim
72 words
A polymerization catalyst consisting essentially of the reaction product of a vanadium ion-exchanged montmorillonite clay and an aluminum alkyl; said vanadium ion-exchanged montmorillonite clay having been prepared by treating a montmorillonite clay with an aqueous solution of vanadyl sulfate until said clay has incorporated therein, by ion-exchange, at least 3 weight % of vanadium (on a dry weight basis), washing said clay free of occluded ions, and drying said vanadium ion-exchanged clay.
Claim 6
Dependent Claim
15 words
A polymerization catalyst of claim 3 in which the aluminum alkyl is diethyl aluminum chloride.
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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) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |