US3758603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separation of unsaturated hydrocarbons
Assignee: Standard Oil Co
•
Filing: 1972-05-12
•
Granted: 1973-09-11
•
Expires: 1992-05-12
Abstract
Abstract There is described the separation of aliphatically unsaturated hydrocarbons from mixtures by the combined use of liquid barrier permeation and metal complexing techniques. The liquid barrier is in contact with a film membrane, and the barrier contains complex-forming metal ions in aqueous solution. The metal ions may be, for example, noble metal, mercuric, cuprous or other metal ions, and mixtures of these metal ions, with or without other cations, may be used. The separation of ethylene from ethane and methane is of particular interest.
Inventors
- 👤 E Steigelmann
- 👤 R Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; B; B01; B01D; B01D61/00; B01D61/38; B01D71/00; B01D71/06; B01D71/56; C07C7/156
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
18 words
The method of claim 1 wherein said mixture contains one or more of methane, ethane, propane and hydrogen.
Claim 2
Independent Claim
157 words
A method for separation of aliphatically-unsaturated hydrocarbon of two to four carbon atoms which comprises contacting from a first side of a semi-permeable membrane, a vaporous mixture containing said unsaturated hydrocarbon and other vaporous hydrocarbon of two to four carbon atoms, with an aqueous liquid barrier in contact with said semi-permeable membrane which is essentially solid, water-insoluble, permeable to said vaporous mixture in the absence of said aqueous liquid and impermeable to said aqueous liquid, said liquid barrier having therein metal ions which combine with said unsaturated hydrocarbon to form a water-soluble complex, the partial pressure of said unsaturated hydrocarbon on a second side of said semi-permeable membrane being sufficiently less than the partial pressure of said unsaturated hydrocarbon on said first side of said semi-permeable membrane to release said unsaturated hydrocarbon on said second side of said semi-permeable membrane, and removing said released unsaturated hydrocarbon from the vicinity of said second side of said semi-permeable membrane.
Claim 3
Dependent Claim
14 words
The method of claim 3 in which the metal ions are cuprous ammonium ions.
Claim 4
Dependent Claim
13 words
The method of claim 4 in which the unsaturated hydrocarbon separated is acetylene.
Claim 5
Dependent Claim
13 words
The method of claim 3 in which said unsaturated hydrocarbon separated is ethylene.
Claim 6
Dependent Claim
21 words
The method of claim 6 in which the ethylene is in admixture with one or more of methane, ethane and hydrogen.
Claim 7
Independent Claim
132 words
A method for separation of actylene which comprises contacting from a first side of a semi-permeable membrane, a vaporous mixture containing acetylene and other gaseous hydrocarbon, with an aqueous liquid barrier in contact with said semi-permeable membrane which is essentially solid, water-insoluble, permeable to said vaporous mixture in the absence of said aqueous liquid and impermeable to said aqueous liquid, said liquid barrier having therein metal ions which combine with acetylene to form a water-soluble complex, the partial pressure of acetylene on a second side of said semi-permeable membrane being sufficiently less than the partial pressure of actylene on said first side of said semi-permeable membrane to release acetylene on said second side of said semi-permeable membrane, and removing released acetylene from the vicinity of said second side of said semi-permeable membrane.
Claim 8
Dependent Claim
14 words
The method of claim 1 in which said metal ions are noble metal ions.
Claim 9
Dependent Claim
13 words
The method of claim 9 in which said noble metal ions are silver.
Claim 10
Dependent Claim
20 words
The method of claim 10 in which there are also present in said aqueous liquid non-noble metal or ammonium ions.
Claim 11
Dependent Claim
17 words
The method of claim 11 in which non-noble ions are present and are zinc or copper ions.
Claim 12
Dependent Claim
13 words
The method of claim 10 in which the unsaturated hydrocarbon separated is ethylene.
Claim 13
Dependent Claim
21 words
The method of claim 13 in which the ethylene is in admixture with one or more of methane, ethane and hydrogen.
Claim 14
Dependent Claim
29 words
The method of claim 3 in which said aqueous liquid is positioned adjacent said first side of said semi-permeable membrane and said vaporous mixture is passed into said liquid.
Claim 15
Dependent Claim
13 words
The method of claim 15 in which said unsaturated hydrocarbon separated is ethylene.
Claim 16
Dependent Claim
21 words
The method of claim 16 in which the ethylene is in admixture with one or More of methane, ethane and hydrogen.
Claim 17
Dependent Claim
13 words
The method of claim 17 in which the noble metal ions are silver.
Claim 18
Dependent Claim
17 words
The method of claim 18 in which said aqueous liquid also contains non-noble metal or ammonium ions.
Claim 19
Dependent Claim
18 words
The method of claim 19 in which non-noble metal ions are present and are zinc or copper ions.
References Cited (Backward Citations)
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Cited
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |