US4608060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of polar gases from nonpolar gases
Assignee: Honeywell UOP LLC
•
Filing: 1985-04-15
•
Granted: 1986-08-26
•
Expires: 2005-04-15
Abstract
Abstract Polar gases such as hydrogen sulfide, sulfur dioxide and ammonia may be separated from nonpolar gases such as methane, nitrogen, hydrogen or carbon dioxide by passing a mixture of polar and nonpolar gases over the face of a multicomponent membrane at separation conditions. The multicomponent membrane which is used to effect the separation will comprise a mixture of a glycol plasticizer having a molecular weight of from about 200 to about 600 and an organic polymer cast on a porous support. The use of such membranes as exemplified by polyethylene glycol and silicon rubber composited on polysulfone will permit greater selectivity accompanied by a high flux rate in the separation process.
Inventors
- 👤 Santi Kulprathipanja
- 👤 Sudhir S. Kulkarni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:17
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/14; B01D69/141; B01D67/00; B01D67/0002; B01D69/12; B01D2323/00; B01D2323/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A process for the separation of a polar gas from a nonpolar gas in a feed mixture containing said gases which comprises contacting said mixture with the upstream face of a multicomponent membrane which comprises a mixture of a glycol plasticizer having a molecular weight of from about 200 to about 600 and an organic polymer cast on a porous support, said support having a ratio of total surface area to total pore cross-sectional area of from about 5:1 to about 900:1, at separation conditions, which said polar gas has a greater steady state permeability than said nonpolar gas, and recovering the permeate which emanates from the downstream face of said membrane, said permeate comprising a product mixture in which the proportion of polar gas to nonpolar gas is greater than the proportion of polar gas to nonpolar gas in said feed mixture.
Claim 2
Dependent Claim
143 words
A process for the separation of a polar gas from a nonpolar gas in a feed mixture containing said gases which comprises contacting said mixture with the upstream face of a multicomponent membrane which comprises a mixture of a glycol plasticizer having a molecular weight of from about 200 to about 600 and an organic polymer cast on a porous support, said support having a ratio of total surface area to total pore cross-sectional area of from about 5:1 to about 900:1, at separation conditions, which said polar gas has a greater steady state permeability than said nonpolar gas, and recovering the permeate which emanates from the downstream face of said membrane, said permeate comprising a product mixture in which the proportion of polar gas to nonpolar gas is greater than the proportion of polar gas to nonpolar gas in said feed mixture.
Claim 3
Dependent Claim
34 words
The process as set forth in claim 1 in which said separation conditions include ambient temperatures and a pressure in the range of from about 10 to about 500 pounds per square inch gauge.
Claim 4
Dependent Claim
45 words
The process as set forth in claim 1 in which said glycol plasticizer having a high boiling point and a low partial pressure is uniformly dispersed as an emulsion in said organic polymer or is in homogeneous phase as a solution with said organic polymer.
Claim 5
Dependent Claim
17 words
The process as set forth in claim 1 in which said organic polymer comprises a silicon rubber.
Claim 6
Dependent Claim
16 words
The process as set forth in claim 1 in which said porous support comprises cellulose acetate.
Claim 7
Dependent Claim
15 words
The process as set forth in claim 1 in which said porous support comprises polysulfone.
Claim 8
Dependent Claim
26 words
The process as set forth in claim 1 in which said polar gas is selected from the group consisting of ammonia, hydrogen sulfide and sulfur dioxide.
Claim 9
Dependent Claim
26 words
The process as set forth in claim 1 in which said polar gas is ammonia, and said nonpolar gas comprises a mixture of nitrogen and hydrogen.
Claim 10
Dependent Claim
26 words
The process as set forth in claim 1 in which said polar gas is hydrogen sulfide and said nonpolar gas comprises a mixture of hydrocarbon gases.
Claim 11
Dependent Claim
29 words
The process as set forth in claim 1 in which said polar gas is sulfur dioxide and said nonpolar gas comprises a mixture of carbon dioxide, nitrogen and oxygen.
References Cited (Backward Citations)
US3133137A
Cited
US3133132A
Cited
US3335545A
Cited
US3457180A
Cited
US3556305A
Cited
US3625734A
Cited
US3656993A
Cited
US3653180A
Cited
US3810775A
Cited
US4032454A
Cited
US3862030A
Cited
US3878104A
Cited
US3993566A
Cited
US4098931A
Cited
US4170559A
Cited
US4230463A
Cited
US4388256A
Cited
US4302334A
Cited
US4243701A
Cited
US4517142A
Cited
US4341605A
Cited
US4430807A
Cited
US4549012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |