Patent US3658463A successfully refreshed from Google Patents.
US3658463A
Expired / Lapsed
US
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Solvent absorption of carbon monoxide
Assignee: Phillips Petroleum Co
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Filing: 1969-10-06
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Granted: 1972-04-25
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Expires: 1989-10-06
Abstract
Abstract A process for the selective removal of carbon monoxide from gaseous streams employing an absorbent comprising cuprous chloride in an organic medium such as formamide, an ether, an amine, a nitrile, a nitroparaffin, a nitroaromatic, pyridine, olefins and methyl cellosolve and combinations thereof.
Inventors
- 👤 William G Billings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:21
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/62; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
35 words
The method of claim 1 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and at least one of ethylene glycol monomethyl ether, monoethanol amine, pyridine, 4-vinyl-cyclohexene-1, 1-hexene, methylcellosolve, 2-methoxyethanol and propionitrile.
Claim 2
Dependent Claim
55 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and ethylene glycol monomethyl ether, said formamide and said ethylene glycol monomethyl ether being contained in amounts of about 40 to about 60 parts of formamide to about 60 to about 40 parts of ethylene glycol monomethyl ether.
Claim 3
Dependent Claim
51 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and monoethanol amine, said formamide and said monoethanol amine being contained in amounts of about 70 to about 80 volume percent of formamide to about 30 to about 20 volume percent of monoethanol amine.
Claim 4
Dependent Claim
46 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and pyridine, said formamide and said pyridine being contained in amounts of about 77 to about 83 volume percent formamide and about 23 to about 17 volume percent pyridine.
Claim 5
Dependent Claim
29 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and methylcellosolve, said formamide and methylcellosolve being contained in substantialLy equal quantities.
Claim 6
Dependent Claim
44 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide, methylcellosolve and pyridine, said formamide, methylcellosolve and pyridine being contained in amounts of about 40 volume percent formamide, 40 volume percent methylcellosolve and 20 volume percent pyridine.
Claim 7
Dependent Claim
30 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and 2-methoxyethanol, said formamide and said 2-methoxyethanol being contained in substantially equal quantities.
Claim 8
Dependent Claim
46 words
The method of claim 2 in which said absorbent contains as its essential ingredients cuprous chloride, formamide and propionitrile, said formamide and said propionitrile being contained in amounts of about 90 to about 50 volumes of formamide and about 10 to about 50 volumes of propionitrile.
Claim 9
Dependent Claim
31 words
The method of claim 7 in which said carbon monoxide containing absorbent is regenerated and at least one of methylethylketone, methylisobutylketone and acetone is introduced into said absorbent prior to regeneration.
Claim 10
Dependent Claim
29 words
The method of claim 9 in which said carbon monoxide containing absorbent contains water and said absorbent is regenerated by contacting said absorbent with a gaseous stream containing hydrogen.
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |