Patent EP0060693A2 successfully refreshed from Google Patents.
EP0060693A2
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EP
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Process for separating one gas from a gas mixture
Assignee: Monsanto Co
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Filing: 1982-03-12
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Granted: —
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Expires: 2002-03-12
Abstract
Abstract A process for separating one gas from a feed gas mixture containing the one gas wherein the mixture is brought into contact with one side of a membrane more permeable to the one gas than the other gases of the mixture and the permeated gas is recovered from the other side of the membrane. In order to maintain the process at a substantially constant rate of recovery at varying feed gas flow rates and/or pressures, the rate of recovery is sensed and the gas mixture is heated or cooled to vary its temperature in proportion to variations in feed gas flow rates and/or pressure such that the rate of recovery remains substantially constant. The rate of recovery may be measured in terms of purity of the permeated gas in the separated gas stream, the amount of gas recovered in a given time period or the percentage of the one gas separated from the feed gas mixture.
Inventors
- 👤 Donald Lewis Gage Maclean
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
142 words
A process for recovering one gas from a feed gas made up of a mixture of said one gas and at least one other gas, said feed gas mixture having a variable flow characteristic, comprising a. bringing said feed gas mixture into contact with one side of a membrane more permeable to said one gas than said other gas to allow said one gas to permeate to the other side of the membrane, said feed gas being under a first pressure, b. recovering said permeated one gas from said other side at a second pressure lower than said first pressure, and c. varying the temperature of the feed gas mixture prior to said contact in response to variations in said flow characteristic in such a manner that the rate of recovery of said one gas is maintained at a substantially constant value.
Claim 2
Dependent Claim
142 words
A process for recovering one gas from a feed gas made up of a mixture of said one gas and at least one other gas, said feed gas mixture having a variable flow characteristic, comprising a. bringing said feed gas mixture into contact with one side of a membrane more permeable to said one gas than said other gas to allow said one gas to permeate to the other side of the membrane, said feed gas being under a first pressure, b. recovering said permeated one gas from said other side at a second pressure lower than said first pressure, and c. varying the temperature of the feed gas mixture prior to said contact in response to variations in said flow characteristic in such a manner that the rate of recovery of said one gas is maintained at a substantially constant value.
Claim 3
Dependent Claim
41 words
A process of Claim 1, wherein the rate of recovery is sensed and the feed gas mixture temperature is varied in response to sensed variations in said rate of recovery to maintain said rate of recovery at a substantially constant value.
Claim 4
Dependent Claim
27 words
A process of Claim 1, wherein said flow characteristic is sensed and said gas mixture temperature is varied in response to sensed variations in said flow characteristics.
Claim 5
Dependent Claim
18 words
A process of Claim 3, wherein the membrane is in the form of a plurality of hollow filaments.
Claim 6
Dependent Claim
18 words
A process of Claim 4, wherein the flow characteristic sensed is the flow rate of the gas mixture.
Claim 7
Dependent Claim
71 words
A process of Claim 5, wherein the said one gas is hydrogen and the filaments are made from a polysulfone polymer and have a separation factor of at least 10 for hydrogen over said other gas and a hydrogen permeability of at least about 1 x 10 -6 cubic centimeters of hydrogen per square centimeter of filament surface per second at a pressure of 1 centimeter of mercury across said membrane.
Claim 8
Dependent Claim
21 words
A process of Claim 6, wherein the gas mixture temperature is varied within the range of 5°C. to 90 o C.
Claim 9
Dependent Claim
24 words
A process of Claim 7, wherein the gas mixture temperature is varied to a temperature within the range of 30 o C. to 60°C.
Claim 10
Dependent Claim
17 words
A process of Claim 4, wherein the flow characteristic sensed is the pressure of the gas mixture.
Claim 11
Dependent Claim
21 words
A process of Claim 2, wherein the said rate of recovery is in terms of purity of said permeated one gas.
Claim 12
Dependent Claim
23 words
A process of Claim 2, wherein said rate of recovery is in terms of the amount of said one gas permeated versus time.
Claim 13
Dependent Claim
25 words
A process of Claim 2, wherein said rate of recovery is in terms of the percentage of said one gas removed from said gas mixture.
Claim 14
Dependent Claim
66 words
A process of Claim 12, wherein the temperature of the feed gas mixture is varied to vary the permeability of said one gas in such a manner that the expression remains substantially constant, where P/ℓ is said permeability of said one gas,AP is the difference in partial pressure of said one gas across the membrane and Q is the flow rate of said feed gas mixture.
Claim 15
Dependent Claim
104 words
A process of Claim 12, wherein the temperature of the feed gas mixture is varied in accordance with the expression where T is the temperature in °K to which the feed gas mixture is heated, T is a predetermined temperature in °K at which a desired percentage of said one gas is recovered from the feed gas mixture at a predetermined flow rate, Q is said predetermined flow rate in cubic meters per minute, Q is the flow rate in cubic meters per minute to which the feed gas mixture is varied, and C is a constant having the value of 500 to 3500.
Claim 16
Dependent Claim
15 words
A process of Claim 14, wherein C is within the range of 1400 to 2500.
References Cited (Backward Citations)
No citation records indexed.
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