Patent US4347066A successfully refreshed from Google Patents.
US4347066A
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Removal of CO and unsaturated hydrocarbons from gas streams using copper oxalate complexes
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1981-07-13
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Granted: 1982-08-31
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Expires: 2001-07-13
Abstract
Abstract A process for removing CO from a gas stream which comprises contacting the gas stream with a mixture of Cu 2 O and oxalic acid in an inert organic solvent. The process selectively removes CO from the gas stream and forms a novel cuprous oxalate complex of the formula Cu 2 (CO) 2 C 2 O 4 . Cu 2 (CO)C 2 O 4 can be further contacted with a feedstream containing unsaturated hydrocarbon L thereby displacing CO from the oxalate complex, removing L from the feedstream and forming a new complex Cu 2 (CO) n L m C 2 O 4 where n and m are numbers from 0 to 2.
Inventors
- 👤 Gerald Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:19
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; B01D53/1425; B01D53/34; B01D53/46; B01D53/62
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
33 words
A process for selectively removing CO from a CO containing gas stream which comprises contacting the gas stream with a mixture of Cu 2 O and oxalic acid in an inert organic solvent.
Claim 2
Dependent Claim
33 words
A process for selectively removing CO from a CO containing gas stream which comprises contacting the gas stream with a mixture of Cu 2 O and oxalic acid in an inert organic solvent.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the mixture has a temperature of from -100° to +100° C.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the gas stream has a CO pressure or partial pressure of from 0.1 to 300 atm.
Claim 5
Dependent Claim
23 words
The process of claim 1 wherein the amounts of Cu 2 O and oxalic acid range from about 0.01 M to 3 M.
Claim 6
Dependent Claim
22 words
The process of claim 1 where the inert solvent is an ether, saturated aliphatic hydrocarbon, aromatic hydrocarbon, ester, amide, ketone or sulfolane.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein CO is removed by forming a complex of the formula Cu 2 (CO) 2 C 2 O 4 .
Claim 8
Dependent Claim
26 words
The process of claim 6 wherein the complex is heated to a temperature sufficient to remove CO thereby forming Cu 2 C 2 O 4 .
Claim 9
Dependent Claim
23 words
The process of claim 7 wherein the Cu 2 C 2 O 4 mixture is cooled and contacted with gas stream containing CO.
Claim 10
Dependent Claim
36 words
A process for removing unsaturated hydrocarbons containing at least one non-aromatic unsaturation from feedstreams which comprises contacting the feedstream with a mixture of Cu 2 (CO) 2 C 2 O 4 in an inert organic solvent.
Claim 11
Dependent Claim
36 words
A process for removing unsaturated hydrocarbons containing at least one non-aromatic unsaturation from feedstreams which comprises contacting the feedstream with a mixture of Cu 2 (CO) 2 C 2 O 4 in an inert organic solvent.
Claim 12
Dependent Claim
18 words
The process of claim 9 wherein the unsaturated hydrocarbon contains at least one ethylenic, acetylenic or isonitrilic unsaturation.
Claim 13
Dependent Claim
11 words
The process of claim 9 wherein the feedstream is substatially CO-free.
Claim 14
Dependent Claim
14 words
The process of claim 9 wherein the temperature is from 25° to 150° C.
Claim 15
Dependent Claim
39 words
The process of claim 9 wherein a complex of the formula Cu 2 (CO) n L m C 2 O 4 where n and m are numbers from 0 to 2 and L represents the unsaturated hydrocarbon, is formed.
Claim 16
Dependent Claim
63 words
The process of claim 13 wherein L is C 2 -C 30 alkene, C 2 -C 30 alkyne, C 8 -C 30 arylalkene, C 8 -C 30 arylalkyne, C 4 -C 14 cycloalkene or isonitrile of the formula R--N.tbd.C where R is C 1 -C 20 alkyl, C 3 - 12 cycloalkyl, C 7 -C 20 aralkyl or C 6 -C 10 aryl.
Claim 17
Dependent Claim
16 words
The process of claim 13 wherein n is 0 and m is from 1 to 2.
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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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |