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US3607048A
Expired / Lapsed
US
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Regeneration of liquids used to absorb carbon dioxide from gases intended for the production of ammonia synthesis gas
Assignee: Linde GmbH
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Filing: 1968-01-18
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Granted: 1971-09-21
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Expires: 1988-01-18
Abstract
Abstract In the production of ammonia from synthesis gas which has had its CO2 absorbed by cold liquid, e.g. by cold methanol, the improvement of regenerating CO2-loaded liquid with purged (waste) gas from the ammonia synthesis cycle, said purged gas being conventionally withdrawn to maintain a low level of inert gases in the recycle synthesis gas.
Inventors
- 👤 Heinz Karwat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:41
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C01; C01B; C01B3/00; C01B3/02; C01B3/025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
A process as defined by claim 1 wherein the purged gas constitutes 8-14 percent of the ammonia synthesis cycle gas.
Claim 2
Dependent Claim
26 words
A process as defined by claim 1 further comprising the step of supplementing the purged gas by adding thereto inert gases removed from liquid ammonia product.
Claim 3
Dependent Claim
19 words
A process as defined by claim 1 wherein the pressure of the regenerating step is below 1 atmosphere absolute.
Claim 4
Dependent Claim
22 words
A process as defined by claim 1 comprising a further step of removing hydrogen from the purge gas before said regenerating step.
Claim 5
Dependent Claim
29 words
A process as defined by claim 1 wherein said purged gas comprises on volume basis about 69 percent H2, 23 percent N2, 3 percent Ar, and 5 percent CH4.
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) | 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 |