US4516984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degassing process and apparatus for removal of oxygen
Assignee: Emory University
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Filing: 1983-11-08
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Granted: 1985-05-14
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Expires: 2003-11-08
Abstract
Abstract A method for decreasing the oxygen content of a fluid, which comprises contacting the fluid with one side of an interface capable of passing oxygen and retarding the passage of the fluid wherein the contacting takes place in a container permeable to oxygen only through the interface and the second side of the interface is in contact with a chemically deoxygenating environment, is disclosed along with an apparatus useful for conducting the method.
Inventors
- 👤 Isiah M. Warner
- 👤 Chu-Ngi Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:59
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D53/229
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
63 words
A method for decreasing the oxygen content of a fIuid stream which comprises: contacting said fluid with one side of a membrane capable of passing oxygen and retarding the passage of said fluid wherein said contacting takes place in a container permeable to oxygen only through said membrane and the second side of said membrane is in contact with a chemically deoxygenating environments.
Claim 2
Independent Claim
63 words
A method for decreasing the oxygen content of a fIuid stream which comprises: contacting said fluid with one side of a membrane capable of passing oxygen and retarding the passage of said fluid wherein said contacting takes place in a container permeable to oxygen only through said membrane and the second side of said membrane is in contact with a chemically deoxygenating environments.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein said membrane is a porous membrane.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein said membrane is a semipermeable membrane.
Claim 5
Dependent Claim
13 words
The method of claim 1, wherein said chemically deoxygenating environment is a solution.
Claim 6
Dependent Claim
19 words
The method of claim 4, wherein said container is in the form of a tube surrounded by said solution.
Claim 7
Dependent Claim
12 words
The method of claim 5, wherein said tube is a semipermeable membrane.
Claim 8
Dependent Claim
19 words
The method of claim 5, wherein said solution contains Cr 2+ ions and is in contact with amalgamated zinc.
Claim 9
Dependent Claim
15 words
The method of claim 5, wherein said tubing is polytetrafluoroethylene, polysilicone, polypropylene, or polyethylene tubing.
Claim 10
Dependent Claim
11 words
The method of claim 8, wherein said tubing is polyethylene tubing.
Claim 11
Dependent Claim
19 words
The method of claim 9, wherein said solution contains Cr 2+ ions and is in contact with amalgamated zinc.
Claim 12
Independent Claim
112 words
A method for decreasing the oxygen content of a fluid stream, which comprises: contacting said fluid with one side of a membrane capable of passing oxygen and retarding the passage of said fluid wherein said contacting takes place in a container permeable to oxygen only through said membrane and the second side of said membrane is in contact with a chemically deoxgenating environment selected from the group consisting of solutions of chromus ions, mixtures of lithium aluminum hydride and benzopinacolone in pyridine, alkaline aqueous solutions of pyrogallol, Fieser's solution, aqueous sodium dithionite solutions, benzophenone ketyl-containing organic solvents, reduced BTS catalyst, solutions of sodium sulfite, solutions of hydrazine, and solutions of vanadous sulfate.
Claim 13
Independent Claim
112 words
A method for decreasing the oxygen content of a fluid stream, which comprises: contacting said fluid with one side of a membrane capable of passing oxygen and retarding the passage of said fluid wherein said contacting takes place in a container permeable to oxygen only through said membrane and the second side of said membrane is in contact with a chemically deoxgenating environment selected from the group consisting of solutions of chromus ions, mixtures of lithium aluminum hydride and benzopinacolone in pyridine, alkaline aqueous solutions of pyrogallol, Fieser's solution, aqueous sodium dithionite solutions, benzophenone ketyl-containing organic solvents, reduced BTS catalyst, solutions of sodium sulfite, solutions of hydrazine, and solutions of vanadous sulfate.
Claim 14
Independent Claim
70 words
A method for decreasing the oxygen content of a fluid stream, which comprises: contacting said fluid with one side of a membrane capable of passing oxygen and retarding the passage of said fluid wherein said contacting takes place in a container permeable to oxygen only through said membrane and the second side of said membrane is in contact with a solution containing Cr 2+ ions in contact with amalgamated zinc.
Claim 15
Independent Claim
70 words
A method for decreasing the oxygen content of a fluid stream, which comprises: contacting said fluid with one side of a membrane capable of passing oxygen and retarding the passage of said fluid wherein said contacting takes place in a container permeable to oxygen only through said membrane and the second side of said membrane is in contact with a solution containing Cr 2+ ions in contact with amalgamated zinc.
Claim 16
Independent Claim
147 words
An apparatus for deoxygenating a fluid stream, which comprises: a membrane capable of passing oxygen and retarding the passage of said fluid; first containing means for maintaining said fluid in contact with one side of said membrane, said first containing means being impermeable to oxygen except through said membrane and having inlet and outlet means through which said fluid is conducted into and out of said first containing means; and second containing means for maintaining a chemically deoxygenating environment in contact with a second side of said membrane wherein said liquid containing means contains a chemically deoxygenating environment selected from the group consisting of solutions of chromus ions, mixtures of lithium aluminum hydride and benzopinacolone in pyridine, alkaline aqueous solutions of pyrogallol, Fieser's solutions, aqueous sodium dithionite solutions, benzophenone ketyl-containing organic solvents, reduced BTS catalyst, solutions of sodium sulfite, solutions of hydrazine, and solutions of vanadous sulfate.
Claim 17
Independent Claim
147 words
An apparatus for deoxygenating a fluid stream, which comprises: a membrane capable of passing oxygen and retarding the passage of said fluid; first containing means for maintaining said fluid in contact with one side of said membrane, said first containing means being impermeable to oxygen except through said membrane and having inlet and outlet means through which said fluid is conducted into and out of said first containing means; and second containing means for maintaining a chemically deoxygenating environment in contact with a second side of said membrane wherein said liquid containing means contains a chemically deoxygenating environment selected from the group consisting of solutions of chromus ions, mixtures of lithium aluminum hydride and benzopinacolone in pyridine, alkaline aqueous solutions of pyrogallol, Fieser's solutions, aqueous sodium dithionite solutions, benzophenone ketyl-containing organic solvents, reduced BTS catalyst, solutions of sodium sulfite, solutions of hydrazine, and solutions of vanadous sulfate.
Claim 18
Dependent Claim
12 words
The apparatus of claim 13, wherein said membrane is a porous membrane.
Claim 19
Dependent Claim
12 words
The apparatus of claim 13, wherein said membrane is a semipermeable membrane.
Claim 20
Dependent Claim
25 words
The apparatus of claim 15, wherein said membrane is in the form of a tube arranged to conduct said fluid through said second containing means.
Claim 21
Dependent Claim
24 words
The apparatus of claim 16, wherein said tube is formed from a material selected from the group consisting of polytetrafluoroethylene, polysilicone, polypropylene, and polyethylene.
Claim 22
Dependent Claim
13 words
The apparatus of claim 17, wherein said tube is formed of polyethylene tubing.
Claim 23
Dependent Claim
14 words
The apparatus of claim 18, wherein said first containing means consists of said tube.
Claim 24
Dependent Claim
14 words
The apparatus of claim 13, wherein said second containing means comprises liquid containing means.
Claim 25
Dependent Claim
24 words
The apparatus of claim 20, wherein said first containing means is a tube located within a liquid containing area of said liquid containing means.
Claim 26
Dependent Claim
15 words
The apparatus of claim 21, wherein said tube includes a section of semipermeable membrane tubing.
Claim 27
Dependent Claim
11 words
The apparatus of claim 22, wherein said tubing is polyethylene tubing.
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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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |