Patent US3344585A successfully refreshed from Google Patents.
US3344585A
Expired / Lapsed
US
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Method for recovering ammonia from gaseous mixture
Assignee: Individual
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Filing: 1967-05-12
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Granted: 1967-10-03
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Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Eugene G Hollowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:37
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1406; B01D47/00; B01D53/1418; B01D53/34; B01D53/46; B01D53/54; B01D53/58; C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; B01D2257/00; B01D2257/40; B01D2257/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A METHOD FOR RECOVERING AT LEAST 9K% OF THE AMMONIA PRESENT IN A FIRST GASEOUS MIXTURE CONSISTING ESSENTIALLY OF ABOUT 10-30 MOLE PERCENT AMMONIA AND ABOUT 90-70 MOLE PERCENT INERT GAS, SAID INERT GAS CONSISTING ESSENTIALLY OF A MIXTURE OF HYDROGEN, METHAME, NITROGEN, AND ARGON WITH THE HYDROGEN AND METHANE COMPONENTS COMPRISING AT LEAST ABOUT 50 MOLE PERCENT OF SAID FIRST GASEOUS MIXTURE, SAID METHOD COMPRISING: (A) PASSING A STREAM OF SAID FIRST GASEOUS MIXTURE AT A PRESSURE OF AT LEAST ABOUT 200 P.S.I.A. THROUGH A WETTED-WALL SCRUBBER HAVING SCRUBBING TUBES IN WHICH SAID GASEOUS MIXTURE IS SCRUBBED WITH A COUNTERCURRENT STREAM OF A FIRST AQUEOUS SOLUTION OF AMMONIA, SAID FIRST AQUEOUS SOLUTION BEING PREPARED IN A LAYERRECITED SCRUBBING STEP AND CONSISTING ESSENTIALLY OF ABOUT 3-10 WEIGHT PERCENT AMMONIA AND ABOUT 9790 WEIGHT PERCENT WATER, WHILE COOLING SAID SCRUBBING TUBES EXTERNALLY WITH WATER TO MAINTAIN THE TEMPERATURE OF THE AQUEOUS AMMONIA SOLUTION WITHIN THE TUBES BELOW ABOUT 110*F., TO FORM THEREIN A SECOND AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF
Claim 2
Independent Claim
168 words
A METHOD FOR RECOVERING AT LEAST 9K% OF THE AMMONIA PRESENT IN A FIRST GASEOUS MIXTURE CONSISTING ESSENTIALLY OF ABOUT 10-30 MOLE PERCENT AMMONIA AND ABOUT 90-70 MOLE PERCENT INERT GAS, SAID INERT GAS CONSISTING ESSENTIALLY OF A MIXTURE OF HYDROGEN, METHAME, NITROGEN, AND ARGON WITH THE HYDROGEN AND METHANE COMPONENTS COMPRISING AT LEAST ABOUT 50 MOLE PERCENT OF SAID FIRST GASEOUS MIXTURE, SAID METHOD COMPRISING: (A) PASSING A STREAM OF SAID FIRST GASEOUS MIXTURE AT A PRESSURE OF AT LEAST ABOUT 200 P.S.I.A. THROUGH A WETTED-WALL SCRUBBER HAVING SCRUBBING TUBES IN WHICH SAID GASEOUS MIXTURE IS SCRUBBED WITH A COUNTERCURRENT STREAM OF A FIRST AQUEOUS SOLUTION OF AMMONIA, SAID FIRST AQUEOUS SOLUTION BEING PREPARED IN A LAYERRECITED SCRUBBING STEP AND CONSISTING ESSENTIALLY OF ABOUT 3-10 WEIGHT PERCENT AMMONIA AND ABOUT 9790 WEIGHT PERCENT WATER, WHILE COOLING SAID SCRUBBING TUBES EXTERNALLY WITH WATER TO MAINTAIN THE TEMPERATURE OF THE AQUEOUS AMMONIA SOLUTION WITHIN THE TUBES BELOW ABOUT 110*F., TO FORM THEREIN A SECOND AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF
References Cited (Backward Citations)
US1999546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |