US3607047A
Expired / Lapsed
US
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Ammonia separation process
Assignee: HENRY T BROOM
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Filing: 1969-06-25
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Granted: 1971-09-21
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Expires: 1989-06-25
Abstract
Abstract Ammonia is separated from a mixture containing ammonia and at least one of hydrogen sulfide and carbon dioxide, e.g., a coal gas, by a process comprising contacting the mixture with a phenolic liquid, e.g., cresols, for a time sufficient to provide a ratio of total moles of ammonia absorbed by the liquid to moles of phenolic in the liquid between 0.5 and 1.0, and thereafter separating the resulting mixture from the resulting phenolic liquid.
Inventors
- 👤 Henry T Broom
- 👤 James O Mcwhorter
- 👤 Michael R Basila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:28
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
16 words
A process as defined in claim 1 wherein the temperature is between about 70*and 175* F.
Claim 2
Dependent Claim
14 words
A process as defined in claim 2 wherein the mixture is a gaseous mixture.
Claim 3
Dependent Claim
20 words
A process as defined in claim 3 wherein the mixture contains minor amounts of hydrocarbons, mercaptans and other weak acids.
Claim 4
Dependent Claim
31 words
A process as defined in claim 4 wherein the mixture is a gaseous mixture consisting essentially of ammonia and hydrogen sulfide with minor amounts of hydrocarbons, mercaptans and other week acids.
Claim 5
Dependent Claim
52 words
A process as defined in claim 5 wherein the phenolic mixture is at least one of phenol; an alkyl phenol having up to six carbon atoms in the alkyl group; and alkoxy phenol having up to about six carbon atoms in the alkoxy group; a halophenol; a hydroxyphenol; naphthol; and a xylenol.
Claim 6
Dependent Claim
20 words
A process as defined in claim 6 wherein the phenolic liquid is substantially a mixture of phenol and the cresols.
Claim 7
Dependent Claim
17 words
A process as defined in claim 7 wherein the phenolic liquid and the mixture are substantially anhydrous.
Claim 8
Dependent Claim
121 words
A continuous process for separating ammonia from a gaseous mixture containing ammonia and at least one of hydrogen sulfide and carbon dioxide which comprises countercurrently contacting a gaseous mixture having a temperature between about 70* and 130* F. with a phenolic liquid having a temperature between about 100*and 160* F. for a time sufficient to provide a ratio of total moles of ammonia absorbed by the liquid between 0.5 and 1.0; thereafter separating the resulting substantially ammonia-free gaseous mixture from the resulting phenolic liquid containing absorbed ammonia; heating the phenolic liquid containing ammonia so as to remove substantially all of the ammonia from the liquid; and then using the phenolic liquid from which ammonia has been removed as a recycle stream.
Claim 9
Dependent Claim
47 words
A process as described in claim 9 which contains the additional step of using a portion of the resulting phenolic liquid containing absorbed ammonia as a recycle stream so as to keep the temperature of reaction between ammonia and phenolic liquid between about 95* and 175* F.
References Cited (Backward Citations)
US2288176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |