US2810686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic treatment of waste sulfate pickle liquor
Assignee: Rohm and Haas Co
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Filing: 1954-11-09
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Granted: 1957-10-22
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Expires: 1974-11-09
Abstract
No abstract record available.
Inventors
- 👤 George W Bodamer
- 👤 Horner Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:55
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/36; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/901; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4676; C02F1/4678; C25; C25C; C25C1/00; C25C1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN ELECTROLYTIC PROCESS FOR THE REGENERATION OF SPENT ION PICKLE LIQUOR OF COMMERCE CONTAINING DISSOLVED FERROUS SULFATE AND SULFURIC ACID WHICH COMPRISES PASSING A DIRECT ELECTRIC CURRENT THROUGH AN ELECTROLYSIS CELL WHICH IS DIVIDED MEANS OF AN ANIONIC PERMSELECTIVE DIAPHRAGM INTO AN ANODE COMPARTMENT OF A CATHODE COMPARTMENT; SAID ANODE COMPARTMENT CONTAINING AN ANODE AND ANN AQUEOUS ANODE COMPRISING SULFURIC ACID, AND SAID CATHODE COMPARTMENT CONTAINING A CATHODE AND SPENT IRON PICKLE LIQUOR AS THE CATHOLYTE; AND CONTAINING THE PASSAGE OF SAID CURRENT AFTER THE PH OF THE CATHOLYTE HAS REACHED ABOUT 1.8, WHEREBY METALLIC IRON IS DEPOSITED ON SAID CATHODE AND SULFURIC ACID IS FORMED IN SAID ANODE COMPARTMENT.
Claim 2
Dependent Claim
110 words
AN ELECTROLYTIC PROCESS FOR THE REGENERATION OF SPENT ION PICKLE LIQUOR OF COMMERCE CONTAINING DISSOLVED FERROUS SULFATE AND SULFURIC ACID WHICH COMPRISES PASSING A DIRECT ELECTRIC CURRENT THROUGH AN ELECTROLYSIS CELL WHICH IS DIVIDED MEANS OF AN ANIONIC PERMSELECTIVE DIAPHRAGM INTO AN ANODE COMPARTMENT OF A CATHODE COMPARTMENT; SAID ANODE COMPARTMENT CONTAINING AN ANODE AND ANN AQUEOUS ANODE COMPRISING SULFURIC ACID, AND SAID CATHODE COMPARTMENT CONTAINING A CATHODE AND SPENT IRON PICKLE LIQUOR AS THE CATHOLYTE; AND CONTAINING THE PASSAGE OF SAID CURRENT AFTER THE PH OF THE CATHOLYTE HAS REACHED ABOUT 1.8, WHEREBY METALLIC IRON IS DEPOSITED ON SAID CATHODE AND SULFURIC ACID IS FORMED IN SAID ANODE COMPARTMENT.
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |