US2605169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of waste pickle liquor
Assignee: Honeywell International Inc
•
Filing: 1948-05-26
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Granted: 1952-07-29
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Expires: 1968-05-26
Abstract
No abstract record available.
Inventors
- 👤 Tiddy William
- 👤 Franklin D Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/02; C01G49/06; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A PROCESS FOR THE TREATMENT OF WASTE PICKLE LIQUOR CONTAINING ABOUT 10 TO 30% FERROUS SULFATE AND FREE SULFURIC ACID WHICH COMPRISES IN A FIRST STAGE TREATMENT INTRODUCING A GASEOUS MIXTURE OF AIR AND AMMONIA INTO WASTE LIQUOR MAINTAINED AT A TEMPERATURE BETWEEN 25* AND 63* C. AND A PRESSURE OF 15 TO 60 POUNDS PER SQUARE INCH ABSOLUTE UNTIL THE PH OF THE WASTE LIQUOR IS WITHIN THE RANGE OF 6.0 TO 6.2. AND IN A SECOND STAGE TREATMENT INCREASING THE TEMPERATURE OF THE LIQUOR TO AT LEAST 90* C. AND THE PRESSURE TO FROM 60 TO 105 POUNDS PER SQUARE INCH ABSOLUTE, INTRODUCING AIR CONTAINING DECLINING AMOUNTS OF GASEOUS AMMONIA INTO THE LIQUOR WHILE MAINTAINING THE PH OF THE LIQUOR BETWEEN 6.3 AND 6.7, LIMITING THE ADDITION OF AMMONIA GAS TO NOT IN EXCESS OF STOICHIOMETRIC REQUIREMENTS TO REACT WITH FERROUS SULFATE, REGULATING THE INTRODUCTION OF AIR AND GASEOUS AMMONIA INTO THE PICKLE LIQUOR DURING SAID SECOND STAGE TREATMENT IN ACCORDANCE WITH CHANGES IN PERIODICALLY DETERMINED CONCENTRA-
Claim 2
Dependent Claim
169 words
A PROCESS FOR THE TREATMENT OF WASTE PICKLE LIQUOR CONTAINING ABOUT 10 TO 30% FERROUS SULFATE AND FREE SULFURIC ACID WHICH COMPRISES IN A FIRST STAGE TREATMENT INTRODUCING A GASEOUS MIXTURE OF AIR AND AMMONIA INTO WASTE LIQUOR MAINTAINED AT A TEMPERATURE BETWEEN 25* AND 63* C. AND A PRESSURE OF 15 TO 60 POUNDS PER SQUARE INCH ABSOLUTE UNTIL THE PH OF THE WASTE LIQUOR IS WITHIN THE RANGE OF 6.0 TO 6.2. AND IN A SECOND STAGE TREATMENT INCREASING THE TEMPERATURE OF THE LIQUOR TO AT LEAST 90* C. AND THE PRESSURE TO FROM 60 TO 105 POUNDS PER SQUARE INCH ABSOLUTE, INTRODUCING AIR CONTAINING DECLINING AMOUNTS OF GASEOUS AMMONIA INTO THE LIQUOR WHILE MAINTAINING THE PH OF THE LIQUOR BETWEEN 6.3 AND 6.7, LIMITING THE ADDITION OF AMMONIA GAS TO NOT IN EXCESS OF STOICHIOMETRIC REQUIREMENTS TO REACT WITH FERROUS SULFATE, REGULATING THE INTRODUCTION OF AIR AND GASEOUS AMMONIA INTO THE PICKLE LIQUOR DURING SAID SECOND STAGE TREATMENT IN ACCORDANCE WITH CHANGES IN PERIODICALLY DETERMINED CONCENTRA-
References Cited (Backward Citations)
US961764A
Cited
US868385A
Cited
US1275232A
Cited
US1824936A
Cited
GB376719A
Cited
US1994702A
Cited
US2065618A
Cited
US2133267A
Cited
US2330553A
Cited
US2339793A
Cited
US2365202A
Cited
US2374454A
Cited
US2419240A
Cited
US2427555A
Cited
US2443765A
Cited
US2529874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |