US4075306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for drying an ammonia gas stream
Assignee: Japan Atomic Energy Agency
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Filing: 1976-10-19
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Granted: 1978-02-21
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Expires: 1996-10-19
Abstract
Abstract An ammonia stream can be dried by passing the ammonia stream through liquified ammonia in which sodium metal is dissolved and which is maintained at the boiling point.
Inventors
- 👤 Tadasumi Muromura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:16
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/024
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A method for drying an ammonia gas stream which comprises passing the ammonia gas stream through a liquified ammonia maintained at the boiling point and in which sodium metal is dissolved.
Claim 2
Independent Claim
31 words
A method for drying an ammonia gas stream which comprises passing the ammonia gas stream through a liquified ammonia maintained at the boiling point and in which sodium metal is dissolved.
Claim 3
Dependent Claim
28 words
A method of claim 1 wherein said method is carried out in a pressure-temperature range where two phases of the liquified ammonia and ammonia gas coexist at equilibrium.
Claim 4
Dependent Claim
16 words
A method of claim 1 further including the step of predrying by means of drying agents.
Claim 5
Dependent Claim
21 words
A method of claim 3 wherein said drying agent is selected from the group consisting of potassium hydroxide and calcium oxide.
Claim 6
Independent Claim
56 words
A method for removing oxygen from an ammonia gas stream comprising: pretreating the ammonia gas stream with a palladium catalyst to convert the oxygen to moisture; and passing the pretreated ammonia gas stream through a liquefied ammonia maintained at the boiling point and in which sodium metal is dissolved to remove the moisture from the stream.
Claim 7
Independent Claim
56 words
A method for removing oxygen from an ammonia gas stream comprising: pretreating the ammonia gas stream with a palladium catalyst to convert the oxygen to moisture; and passing the pretreated ammonia gas stream through a liquefied ammonia maintained at the boiling point and in which sodium metal is dissolved to remove the moisture from the stream.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |