US4452958A
Expired / Lapsed
US
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Olefin polymerization with catalysts derived from chromium exchanged zeolites
Assignee: Mobil Oil AS
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Filing: 1983-05-23
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Granted: 1984-06-05
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Expires: 2003-05-23
Abstract
Abstract There is provided the polymerization of 1-olefins such as ethylene with zeolite supported, chromium catalyst compositions. Chromium ions are ion exchanged with zeolites to produce such catalysts.
Inventors
- 👤 Arthur W. Chester
- 👤 Murray: James G.
- 👤 Albert B. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:30
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
49 words
A process for polymerizing 1-olefins, which process comprises contacting 1-olefin monomer with a catalytically efffective amount of a catalyst composition comprising the ion exchange product of chromium ions with a crystalline aluminosilicate zeolite having a Constraint Index of at least about 1, said catalyst composition being activated by calcination.
Claim 2
Dependent Claim
49 words
A process for polymerizing 1-olefins, which process comprises contacting 1-olefin monomer with a catalytically efffective amount of a catalyst composition comprising the ion exchange product of chromium ions with a crystalline aluminosilicate zeolite having a Constraint Index of at least about 1, said catalyst composition being activated by calcination.
Claim 3
Dependent Claim
34 words
A process according to claim 1 wherein said zeolite has a silica of alumina molar ratio of at least about 12 and a Constraint Index within the approximate range of about 1 to 12.
Claim 4
Dependent Claim
20 words
A process according to claim 2 wherein said zeolite is selected from ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein said composition further comprises a catalyst binder.
Claim 6
Dependent Claim
11 words
A process according to claim 1 wherein said zeolite is ZSM-5.
Claim 7
Dependent Claim
12 words
A process according to claim 1 wherein said olefin monomer is ethylene.
Claim 8
Dependent Claim
29 words
A process according to claim 1 wherein said polymerization reaction conditions include a temperature from about 30° to 200° C. and a pressure from about 0 to 1000 psig.
Claim 9
Dependent Claim
27 words
A process according to claim 1 wherein the polymerization reaction is conducted with reactants in the liquid phase and in the presence of an inert organic solvent.
Claim 10
Dependent Claim
19 words
A process according to claim 1 wherein the polymerization reaction is conducted with the reactants in the vapor phase.
Claim 11
Dependent Claim
21 words
A process according to claim 9 wherein the vapor phase polymerization reaction is conducted with the catalyst in a fluidized bed.
Claim 12
Dependent Claim
18 words
A process according to claim 1 wherein said zeolite is selected from Zeolite T, Zeolite W and ZSM-34.
Claim 13
Dependent Claim
11 words
A process according to claim 1 wherein said zeolite is ZSM-34.
Claim 14
Dependent Claim
16 words
A process according to claim 1 wherein said catalyst further comprises a binder for said zeolite.
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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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |