US4049896A
Expired / Lapsed
US
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Olefin polymerization catalyst
Assignee: National Petro-Chemicals Corp
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Filing: 1976-08-20
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Granted: 1977-09-20
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Expires: 1996-08-20
Abstract
Abstract Olefin polymerization catalysts are prepared by depositing a chromium compound and an aluminum compound on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300° C up to the decomposition temperature of the support material. The supported chromium and aluminum compound is then combined with a metallic and/or non-metallic reducing agent, to provide a catalyst system useful in the polymerization of 1-olefins.
Inventors
- 👤 Louis J. Rekers
- 👤 Stanley J. Katzen
- 👤 Jerome H. Krekeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
C; C08; C08F; C08F10/00; C08F110/00; Y; Y10; Y10S; Y10S526/00; Y10S526/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A process for the polymerization of olefins which comprises contacting said olefins with the catalyst system comprising: a. a solid inorganic support material having surface hydroxyl groups, b. a chromium containing compound deposited on said support, said chromium containing compound being capable of reacting with said surface hydroxyl groups, and c. an aluminum compound deposited on said support, said aluminum compound being capable of reacting with said surface hydroxyl groups, said supported chromium containing compound and aluminum compound having been heated in a non-reducing atmosphere at a temperature above 300° C. up to the decomposition temperature of the support material and combined with a metallic or non-metallic reducing agent.
Claim 2
Dependent Claim
109 words
A process for the polymerization of olefins which comprises contacting said olefins with the catalyst system comprising: a. a solid inorganic support material having surface hydroxyl groups, b. a chromium containing compound deposited on said support, said chromium containing compound being capable of reacting with said surface hydroxyl groups, and c. an aluminum compound deposited on said support, said aluminum compound being capable of reacting with said surface hydroxyl groups, said supported chromium containing compound and aluminum compound having been heated in a non-reducing atmosphere at a temperature above 300° C. up to the decomposition temperature of the support material and combined with a metallic or non-metallic reducing agent.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the non-metallic reducing agent is a trialkyl borane.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein the polymerization is carried out in the presence of hydrogen.
References Cited (Backward Citations)
US3392160A
Cited
US3642749A
Cited
US3704287A
Cited
US3875132A
Cited
US3806500A
Cited
US3985676A
Cited
US3984351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |