US4438073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase polymerization apparatus for olefins
Assignee: Eneos Corp
•
Filing: 1981-10-28
•
Granted: 1984-03-20
•
Expires: 2001-10-28
Abstract
Abstract A horizontal agitation bed type vapor phase polymerization apparatus for olefins provided on its lower curved surface with plural cells each having an opening facing on the polymerization reaction system and further having small holes formed in its side wall portion for feeding a starting olefin gas.
Inventors
- 👤 Kunimichi Kubo
- 👤 Yasunosuke Miyazaki
- 👤 Mamoru Yoshikawa
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
C; C08; C08F; C08F2/00; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/38; B01J8/382; B01J8/08; B01J8/10; C08F10/00; B01J2219/00; B01J2219/18; B01J2219/182
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
In a vapor phase polymerization apparatus for olefins constituted by a horizontal type hollow cylindrical vessel having a centrally located driving shaft, the improvement comprising a plurality of cells whose upper portions are open to the inner surface of the lower portion of said vessel, said cells having vertical side walls extending downwardly from the curved bottom wall of the vessel, means defining small holes in said vertical side walls and means for feeding a starting olefin gas into said vessel through said cells.
Claim 2
Dependent Claim
84 words
In a vapor phase polymerization apparatus for olefins constituted by a horizontal type hollow cylindrical vessel having a centrally located driving shaft, the improvement comprising a plurality of cells whose upper portions are open to the inner surface of the lower portion of said vessel, said cells having vertical side walls extending downwardly from the curved bottom wall of the vessel, means defining small holes in said vertical side walls and means for feeding a starting olefin gas into said vessel through said cells.
Claim 3
Dependent Claim
31 words
An apparatus according to claim 1, wherein said small holes formed at least in the side wall portion of each said cell are each about 1.5 to 10 mm in diameter.
Claim 4
Dependent Claim
30 words
An apparatus according to claim 1, wherein the opening portion of each said cell is about 6 to 50 mm in diameter and about 6 to 50 mm in depth.
Claim 5
Dependent Claim
54 words
An apparatus according to claim 1, characterized by further including a gas flow velocity reducing chamber mounted on an upper portion of said vessel, an olefin gas discharge port for discharging and recycling unreacted olefin gas through said gas flow velocity reducing chamber, a polymerization catalyst introducing port, and a resulting polymer discharge port.
Claim 6
Dependent Claim
58 words
An apparatus according to claim 1 or claim 4, wherein said cells are disposed at intervals of about 50 to 300 mm on a lower curved surface portion of said horizontal type hollow cylindrical vessel corresponding to an arc of a circle defined by an angle of about 30 to 180 degrees from the center of said vessel.
Claim 7
Dependent Claim
31 words
An apparatus according to claim 4, wherein the capacity of said gas flow velocity reducing chamber is about 0.5 to 3 times the capacity of said horizontal type hollow cylindrical vessel.
Claim 8
Dependent Claim
98 words
In an apparatus for the vapor phase polymerization of olefins while substantially preventing the formation of a block-type polymer, the apparatus having a horizontal hollow cylindrical vessel with a centrally located drive shaft operating an agitator, the improvement comprising a plurality of cells having upper portions open to the inner surface of a lower portion of the vessel, and having vertical side walls extending downwardly from the curved bottom wall of the vessel, means defining small holes in said vertical side walls of said cells and means for feeding a cooling gas into the vessel through said cells.
Claim 9
Dependent Claim
98 words
In an apparatus for the vapor phase polymerization of olefins while substantially preventing the formation of a block-type polymer, the apparatus having a horizontal hollow cylindrical vessel with a centrally located drive shaft operating an agitator, the improvement comprising a plurality of cells having upper portions open to the inner surface of a lower portion of the vessel, and having vertical side walls extending downwardly from the curved bottom wall of the vessel, means defining small holes in said vertical side walls of said cells and means for feeding a cooling gas into the vessel through said cells.
References Cited (Backward Citations)
US2220193A
Cited
US2803528A
Cited
US3463617A
Cited
GB1267397A
Cited
US4101289A
Cited
US4159307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |