US4200715A
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Vapor phase processes for the polymerization of olefins
Assignee: Chevron USA Inc
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Filing: 1978-05-19
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Granted: 1980-04-29
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Expires: 1998-05-19
Abstract
Abstract A process is provided for the polymerization of an olefin such as ethylene in the vapor phase in a moving bed of particles of the polymerized olefin in which novel means are employed to feed the finely-divided solid polymerization catalyst to the polymerization zone. The process is carried out by pumping into the polymerization zone a Bingham fluid which has the finely-divided solid polymerization catalyst uniformly dispersed throughout a solid continuous phase, which is a mixture of a wax and a hydrocarbon which is a liquid at ambient temperature.
Inventors
- 👤 Thomas J. Lynch
- 👤 Robert J. Rowatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:26
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; B; B01; B01J; B01J8/00; B01J8/0015; C08F2410/00; C08F2410/01; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/903
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
In a process for the catalytic polymerization of a polymerizable olefin in the vapor phase in the presence of solid polymerization catalyst particles in a moving bed of particles of the polymerized olefin; the improvement which consists essentially of feeding the solid polymerization catalyst particles to the polymerization zone by pumping a Bingham fluid into the polymerization zone, said Bingham fluid being a solid at ambient temperature and consisting essentially of finely-divided solid polymerization catalyst particles uniformly dispersed in a continuous solid phase which consists essentially of an intimate mixture of a wax which is a solid at ambient temperature and a hydrogen which is a liquid at ambient temperature.
Claim 2
Dependent Claim
110 words
In a process for the catalytic polymerization of a polymerizable olefin in the vapor phase in the presence of solid polymerization catalyst particles in a moving bed of particles of the polymerized olefin; the improvement which consists essentially of feeding the solid polymerization catalyst particles to the polymerization zone by pumping a Bingham fluid into the polymerization zone, said Bingham fluid being a solid at ambient temperature and consisting essentially of finely-divided solid polymerization catalyst particles uniformly dispersed in a continuous solid phase which consists essentially of an intimate mixture of a wax which is a solid at ambient temperature and a hydrogen which is a liquid at ambient temperature.
Claim 3
Dependent Claim
28 words
The process of claim 1 in which the bed of particles of the polymerized olefin is kept in motion by passing the polymerizable olefin upwardly through the bed.
Claim 4
Dependent Claim
23 words
The process of claim 1 in which the bed of particles of the polymerized olefin is kept in motion by stirring the bed.
Claim 5
Dependent Claim
14 words
The process of claim 1, 2, or 3 in which the olefin is ethylene.
Claim 6
Dependent Claim
29 words
The process of claim 1, 2, or 3 in which the olefin is ethylene and the solid polymerization catalyst particles consist of a chromium compound supported on finely-divided silica.
Claim 7
Dependent Claim
53 words
The process of claim 1, 2, or 3 in which the solid polymerization catalyst particles are the reaction product of a salt of a transition metal of Group IV-B, V-B, or vI-B of the Periodic Table and an organometallic compound of a metal of Group II-A, II-B, or III-B of the Periodic Table.
Claim 8
Dependent Claim
25 words
The process of claim 1, 2, or 3 in which the polymerization catalyst is the reaction product of a titanium chloride and an aluminum alkyl.
Claim 9
Dependent Claim
34 words
A process of claim 1 in which the continuous solid phase consists essentially of 100 parts by weight of a hydrocarbon wax and about 40 to 250 parts by weight of the liquid hydrocarbon.
Claim 10
Dependent Claim
11 words
The process of claim 8 in which the olefin is ethylene.
Claim 11
Dependent Claim
22 words
The process of claim 8 in which the solid polymerization catalyst particles consist of a chromium compound supported on a finely-divided silica.
Claim 12
Dependent Claim
50 words
The process of claim 8 in which the solid polymerization catalyst particles are the reaction product of a salt of a transition metal of Group IV-B, V-B, or VI-B of the Periodic Table and an organometallic compound of a metal of Group II-A, II-B, or III-B of the Periodic Table.
Claim 13
Dependent Claim
22 words
The process of claim 8 in which the polymerization catalyst is the reaction product of a titanium chloride and an aluminum alkyl.
Claim 14
Dependent Claim
108 words
In a process for the catalytic polymerization of ethylene in the vapor phase in the presence of solid polymerization catalyst particles in a moving bed of particles of the polymerized olefin; the improvement which consists essentially of feeding the solid polymerization catalyst particles to the polymerization zone by pumping a Bingham fluid into the polymerization zone, said Bingham fluid being a solid at subambient temperature and consisting essentially of finely-divided solid polymerization catalyst particles uniformly dispersed in a continuous solid phase which consists essentially of 100 parts by weight of a C 10 to C 15 aliphatic hydrocarbon and about 40 to 250 parts by weight of ethylene.
Claim 15
Dependent Claim
108 words
In a process for the catalytic polymerization of ethylene in the vapor phase in the presence of solid polymerization catalyst particles in a moving bed of particles of the polymerized olefin; the improvement which consists essentially of feeding the solid polymerization catalyst particles to the polymerization zone by pumping a Bingham fluid into the polymerization zone, said Bingham fluid being a solid at subambient temperature and consisting essentially of finely-divided solid polymerization catalyst particles uniformly dispersed in a continuous solid phase which consists essentially of 100 parts by weight of a C 10 to C 15 aliphatic hydrocarbon and about 40 to 250 parts by weight of ethylene.
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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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |