US3050369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of iodine from aqueous iodide solutions
Assignee: Dow Chemical Co
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Filing: 1960-03-07
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Granted: 1962-08-21
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Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jack F Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:01
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/13; C01B7/14; B; B01; B01J; B01J41/00; B01J41/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
A METHOD FOR SEPARATING AND RECOVERING IODINE FROM AN AQUEOUS SOLUTION OF AN OIDIDE SALT BY FEEDING SAID SOLUTION AT 10* TO 40* C. TO A WATER-IMMERSED BED OF AN ANION EXCHANGE RESIN IN A POLYHALIDE ANIONIC FORM, SAID POLYHALIDE ANION HAVING THE FORMULA XN-, WHEREIN N IS AN ODD INTEGER FROM 3 TO 7 AND XIS A MEMBER OF THE GROUP CONSISTING OF CHLORINE, BROMINE, IODINE AND COMBINATIONS THEREOF, NO MORE THAN ONE ATOM OF WHICH POLYHALIDE ANION IS IODINE, WHEREBY AVAILABLE REACTIVE HALOGEN OXIDIZES IODIDE ION TO LIBERATE IODIDE, AND THE LIBERATED IODINE DISPLACES CORRESPONDING HALOGEN TO GIVE ANION EXCHANGE RESIN POLYIODIDE, AND RECOVERING IODINE THEREFROM, SAID ANION EXCHANGE RESIN IN ITS NORMAL FORM BEING A MEMBER OF THE GROUP CONSISTING OF THE HALIDE SALTS OF STRONGLY BASIC QUATERNARY AMMONIUM AND WEAKLY BASIC POLYAMINE ANION EXCHANGE RESINS.
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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |