US3352641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of iodide ions from anion exchange resins used to extract iodine
Assignee: Rohm and Haas Co
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Filing: 1967-02-24
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Granted: 1967-11-14
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Nakamura Hiromichi
- 👤 Katoo Hiroshi
- 👤 Minejima Nobuaki
- 👤 Shimizu Hiroshi
- 👤 Satoo Akira
- 👤 Nozaki Masashi
- 👤 Doochi Yuu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/13; C01B7/14; B; B01; B01J; B01J49/00; B01J49/05; B01J49/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE EXTRACTION OF IODIEN FROM AN AQUEOUS SOLUTION CONTAINING IODIDE SALTS BY MEANS OF ANION EXCHANGE RESINS, IN WHICH THE PRINCIPAL QUANTITY OF IODIDE IONS ABSORBED BY THE RSIN HAS BEEN ELUTED THEREFROM BY AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE, THE METHOD FOR RECOVERING THE RESIDUAL IODIDE IONS FROM THE RESIN WHICH COMPRISES CONTACTING THE RESIN WITH AN ELUTRIANT FROM THE CLASS CONTAINING OF ACIDIC AND NEUTAL SODIUM CHLORIDE SOLUTIONS, ADDING TO THE ELUATE CHLORINE GAS AND SUFFICIENT MINERAL ACID TO BRING THE PH OF THE ELUATE DWN TO BETWEEN ABOUT 0.5 AND ABOUT 3.0, WHEREUPON THE IODINE IS CRYSTALLIZED OUT OF SOLUTION, AND FILTERING OF THE IODINE CRYSTALS.
Claim 2
Dependent Claim
110 words
IN THE EXTRACTION OF IODIEN FROM AN AQUEOUS SOLUTION CONTAINING IODIDE SALTS BY MEANS OF ANION EXCHANGE RESINS, IN WHICH THE PRINCIPAL QUANTITY OF IODIDE IONS ABSORBED BY THE RSIN HAS BEEN ELUTED THEREFROM BY AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE, THE METHOD FOR RECOVERING THE RESIDUAL IODIDE IONS FROM THE RESIN WHICH COMPRISES CONTACTING THE RESIN WITH AN ELUTRIANT FROM THE CLASS CONTAINING OF ACIDIC AND NEUTAL SODIUM CHLORIDE SOLUTIONS, ADDING TO THE ELUATE CHLORINE GAS AND SUFFICIENT MINERAL ACID TO BRING THE PH OF THE ELUATE DWN TO BETWEEN ABOUT 0.5 AND ABOUT 3.0, WHEREUPON THE IODINE IS CRYSTALLIZED OUT OF SOLUTION, AND FILTERING OF THE IODINE 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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |