Patent US2780528A successfully refreshed from Google Patents.
US2780528A
Expired / Lapsed
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Process for recovering iodine from iodine-containing aqueous glycol solutions
Assignee: Nitroglycerin AB
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Filing: 1953-09-08
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Granted: 1957-02-05
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Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Fossan Kare Ragnvald
- 👤 Wetterholm Gustav Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:09
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/13; C01B7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN THE RECOVERY OF IODINE FROM AQUEOUS GLYCOL SOLUTIONS CONTAINING DISSOLVED FREE IODINE, HYDROGEN IODIDE AND HYDROLYZABLE ORGANIC IODINE COMPOUNDS; THE PROCESS WHICH COMPRISES TREATING SUCH A GLYCOL SOLUTION WITH A SUFFICIENT AMOUNT OF AN OXIDIZING AGENT, SELECTED FROM THE CLASS CONSISTING OF CHLORINE, NITROGEN OXIDES, POTASSIUM PERMANGANATE, HYDROGEN PEROXIDE, FERRIC CHLORIDE, HYPOCHLOROUS ACID, CHROMIUM TRIOXIDE AND SUBSTANCES CAPABLE OF GENERATING THESE OXIDIZING AGENTS IN THE SOLUTION, TO OXIDIZE THE IODIDES PRESENT WITHOUT AFFECTING THE GLYCOL AND THE HYDROLYZABLE IODINE COMPOUNDS, THEREBY PRECIPITATING FREE IODINE, HYDROLYZING THE SAID HYDROLYZABLE IODINE COMPOUNDS BY MAKING THE SOLUTION ALKALINE AND HEATING TO WATER BATH TEMPERATURES ACIDIFYING THE SOLUTION AND AGAIN TREATING THE SOLUTION WITH A SUFFICIENT QUANTITY OF SAID OXIDIZING AGENT TO PRECIPITATE IODINE FROM THE PRODUCTS RESULTING FROM THE HYDROLYSIS, AND RECOVERING THE PRECIPITATED IODINE.
Claim 2
Dependent Claim
133 words
IN THE RECOVERY OF IODINE FROM AQUEOUS GLYCOL SOLUTIONS CONTAINING DISSOLVED FREE IODINE, HYDROGEN IODIDE AND HYDROLYZABLE ORGANIC IODINE COMPOUNDS; THE PROCESS WHICH COMPRISES TREATING SUCH A GLYCOL SOLUTION WITH A SUFFICIENT AMOUNT OF AN OXIDIZING AGENT, SELECTED FROM THE CLASS CONSISTING OF CHLORINE, NITROGEN OXIDES, POTASSIUM PERMANGANATE, HYDROGEN PEROXIDE, FERRIC CHLORIDE, HYPOCHLOROUS ACID, CHROMIUM TRIOXIDE AND SUBSTANCES CAPABLE OF GENERATING THESE OXIDIZING AGENTS IN THE SOLUTION, TO OXIDIZE THE IODIDES PRESENT WITHOUT AFFECTING THE GLYCOL AND THE HYDROLYZABLE IODINE COMPOUNDS, THEREBY PRECIPITATING FREE IODINE, HYDROLYZING THE SAID HYDROLYZABLE IODINE COMPOUNDS BY MAKING THE SOLUTION ALKALINE AND HEATING TO WATER BATH TEMPERATURES ACIDIFYING THE SOLUTION AND AGAIN TREATING THE SOLUTION WITH A SUFFICIENT QUANTITY OF SAID OXIDIZING AGENT TO PRECIPITATE IODINE FROM THE PRODUCTS RESULTING FROM THE HYDROLYSIS, AND RECOVERING THE PRECIPITATED IODINE.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |