US5129920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas separation apparatus and also method for separating gases by means of such an apparatus
Assignee: Parker Intangibles LLC
•
Filing: 1991-04-18
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Granted: 1992-07-14
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Expires: 2011-04-18
Abstract
Abstract Gas separation apparatus constructed from a module comprising a bundle of asymmetric hollow fibres of poly(2,6-dimethyl-p-phenylene oxide) having the high molecular weight Mw of 10 5 -5.10 6 . The hollow fibres in question produced by coagulation spinning consist of a relatively thick porous layer which offers hardly any resistance to gas permeation and a very dense but thin top layer responsible for the actual favorable gas separation achieved.
Inventors
- 👤 Johannes H. M. Albers
- 👤 Jacob Smid
- 👤 Arnoldus P. M. Kusters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D63/00; B01D63/02; B01D63/024; B01D63/031; B01D69/00; B01D69/08; B01D71/00; B01D71/06; B01D71/52; B01D71/522; B01D71/5223
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
Method for drying gases comprising passing the gas to be dried through a gas separation apparatus constructed from a module comprising a bundle of hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) and provided with an inlet for the gas mixture to be separated and two outlets for the permeate and retentate respectively, characterized in that the module contains asymmetric hollow fibres of poly(2,6-dimethyl-p-phenylene oxide) having a weight-averaged molecular weight Mw of 10 5 -5×10 6 , the asymmetric hollow fibres having a dense nonporous top layer with a thickness of 0.1-2 μm.
Claim 2
Dependent Claim
91 words
Method for drying gases comprising passing the gas to be dried through a gas separation apparatus constructed from a module comprising a bundle of hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) and provided with an inlet for the gas mixture to be separated and two outlets for the permeate and retentate respectively, characterized in that the module contains asymmetric hollow fibres of poly(2,6-dimethyl-p-phenylene oxide) having a weight-averaged molecular weight Mw of 10 5 -5×10 6 , the asymmetric hollow fibres having a dense nonporous top layer with a thickness of 0.1-2 μm.
Claim 3
Dependent Claim
25 words
Method according to claim 1, characterized in that the asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) have an Mw of 2×10 5 -8×10 5 .
Claim 4
Dependent Claim
28 words
Method according to claim 2, characterized in that the asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) have a dense nonporous top layer having a thickness of 0.1-2 μm.
Claim 5
Dependent Claim
36 words
Method according to claim 3, characterized in that the asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) have an Mw of 2×10 5 -8×10 5 and a dense nonporous top layer having a thickness of 0.1-1 μm.
Claim 6
Dependent Claim
78 words
Gas separation apparatus constructed from a module comprising a bundle of hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) and provided with an inlet for the gas mixture to be separated and two outlets for the permeate and retentate respectively, characterized in that the module contains asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) having a weight-averaged molecular weight Mw of 10 5 -5×10 6 , the asymmetric hollow fibres having a dense nonporous top layer with a thickness of 0.1-2.
Claim 7
Dependent Claim
78 words
Gas separation apparatus constructed from a module comprising a bundle of hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) and provided with an inlet for the gas mixture to be separated and two outlets for the permeate and retentate respectively, characterized in that the module contains asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) having a weight-averaged molecular weight Mw of 10 5 -5×10 6 , the asymmetric hollow fibres having a dense nonporous top layer with a thickness of 0.1-2.
Claim 8
Dependent Claim
27 words
Gas separation apparatus according to claim 5, characterized in that the asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) have an Mw of 2×10 5 -8×10 5 .
Claim 9
Dependent Claim
30 words
Gas separation apparatus according to claim 6, characterized in that the asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) have a dense nonporous top layer having a thickness of 0.1-2 μm.
Claim 10
Dependent Claim
38 words
Gas separation apparatus according to claim 6, characterized in that the asymmetric hollow fibres consisting of poly(2,6-dimethyl-p-phenylene oxide) have an Mw of 2×10 5 -8×10 5 and a dense nonporous top layer having a thickness of 0.1-1 μm.
Claim 11
Dependent Claim
37 words
Asymmetric hollow fibre, characterized in that the fibre is constructed from a composition consisting of poly(2,6-dimethyl-p-phenylene oxide) having an Mw of 10 5 -5×10 6 and the thickness of the dense nonporous top layer is 0.1-5 μm.
Claim 12
Dependent Claim
37 words
Asymmetric hollow fibre, characterized in that the fibre is constructed from a composition consisting of poly(2,6-dimethyl-p-phenylene oxide) having an Mw of 10 5 -5×10 6 and the thickness of the dense nonporous top layer is 0.1-5 μm.
Claim 13
Dependent Claim
41 words
Asymmetric hollow fibre according to claim 9, characterized in that the fibre is constructed from a composition consisting of poly(2,6-dimethyl-p-phenylene oxide) having an Mw of 2×10 5 -8×10 5 and the thickness of the dense nonporous top layer is 0.1-2 μm.
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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) | 1995-07-14 | 1996-01-13 | 1996-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-14 | 2000-01-13 | 2000-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-14 | 2004-01-13 | 2004-07-14 | $7700.00 | Window Closed / Lapsed |