US3167390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of waste acid liquor
Assignee: Simon Carves Ltd
•
Filing: 1961-05-17
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Granted: 1965-01-26
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Simpson Peter
- 👤 George F G Clough
- 👤 Kenneth H Todhunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:39
CPC Classifications
C; C02; C02F; C02F9/00; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; C01C; C01C1/00; C01C1/24; C01C1/242; C01G; C01G49/00; C01G49/02; C02F2101/00; C02F2101/10; C02F2101/20; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A METHOD OF TREATING WASTE ACID LIQUOR CONTAINING FERROUS SALTS WITH AMMONIA LIQUOR CONTAINING AMMONIUM HYDROXIDE TO FORM FERROUS HYDRATE AND AN AMMONIUM SALT WHICH COMPRISES, SUPPLYING A STREAM OF SAID WASTE ACID LIQUOR AND A STREAM OF SAID AMMONIA LIQUOR TO A BODY OF MIXED ACID LIQUOR AND AMMONIA LIQUOR, ADMIXING SAID STREAM OF ACID LIQUOR AND SAID STREAM OF AMMONIA LIQUOR IMMEDIATELY AT THEIR ENTRANCE TO SAID BODY OF MIXED ACID LIQUOR AND AMMONIA LIQUOR, MAINTAINING SAID BODY OF MIXED ACID LIQUOR AND AMMONIA LIQUOR AT A TEMPERATURE IN EXCESS OF 50*C. WHILE AGITATING SAID BODY OF LIQUOR TO MIX SAID STREAMS PROMPTLY INTO SAID BODY TO FORM A FILTRABLE PRECIPITATE OF FERROUS HYDROXIDE AND A SOLUTION OF AMMONIUM SALT, REMOVING SAID PRECIPITATE FROM SAID SOLUTION OF AMMONIUM SALT, TREATING THE REACTED LIQUOR WITH AN OXYGEN CONTAINING GAS UNTIL THE FERROUS SALT REMAINING THEREIN IS OXIDIZED TO AN INSOLUBLE FERRIC COMPOUND, REMOVING THE RESULTING FERRIC COMPOUND FROM SAID LIQUOR AND EVAPORATING THE LIQUOR AFTER REMOVAL OF SAID FERRIC COMPOUND TO FORM THE IRON-FREE AMMONIUM SALT CRYSTALS.
Claim 2
Independent Claim
178 words
A METHOD OF TREATING WASTE ACID LIQUOR CONTAINING FERROUS SALTS WITH AMMONIA LIQUOR CONTAINING AMMONIUM HYDROXIDE TO FORM FERROUS HYDRATE AND AN AMMONIUM SALT WHICH COMPRISES, SUPPLYING A STREAM OF SAID WASTE ACID LIQUOR AND A STREAM OF SAID AMMONIA LIQUOR TO A BODY OF MIXED ACID LIQUOR AND AMMONIA LIQUOR, ADMIXING SAID STREAM OF ACID LIQUOR AND SAID STREAM OF AMMONIA LIQUOR IMMEDIATELY AT THEIR ENTRANCE TO SAID BODY OF MIXED ACID LIQUOR AND AMMONIA LIQUOR, MAINTAINING SAID BODY OF MIXED ACID LIQUOR AND AMMONIA LIQUOR AT A TEMPERATURE IN EXCESS OF 50*C. WHILE AGITATING SAID BODY OF LIQUOR TO MIX SAID STREAMS PROMPTLY INTO SAID BODY TO FORM A FILTRABLE PRECIPITATE OF FERROUS HYDROXIDE AND A SOLUTION OF AMMONIUM SALT, REMOVING SAID PRECIPITATE FROM SAID SOLUTION OF AMMONIUM SALT, TREATING THE REACTED LIQUOR WITH AN OXYGEN CONTAINING GAS UNTIL THE FERROUS SALT REMAINING THEREIN IS OXIDIZED TO AN INSOLUBLE FERRIC COMPOUND, REMOVING THE RESULTING FERRIC COMPOUND FROM SAID LIQUOR AND EVAPORATING THE LIQUOR AFTER REMOVAL OF SAID FERRIC COMPOUND TO FORM THE IRON-FREE AMMONIUM SALT CRYSTALS.
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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) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |