US3427236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of an alkali metal chlorate solution for use in a chlorine dioxide generation process
Assignee: Mo och Domsjo AB
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Filing: 1966-03-14
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Granted: 1969-02-11
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Axel Fredrik Scholander
- 👤 Rolf Karl August Brannland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:35
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/26; C25B1/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE PREPARATION OF AN ALKALI METAL CHLORATE SOLUTION COMPRISING ELECTROLYZING AN ALKALI METAL CHLORIDE SOLUTION IN THE PRESENCE OF CHROMIUM SALTS TO PRODUCE AN ALKALI METAL CHLORATE SOLUTION, ADJUSTING THE PH TO SUCH A VALUE THAT THE PRINCIPAL PART OF OF THE CHROMIUM IS IN THE FORM OF CHROMATE IONS, PRECIPITATING THE CHROMATE IONS BY ADDITION OF CATIONS FORMING SLIGHTLY SOLUBLE CHROMATES, SEPARATING A PRECIPITATE OF THE SLIGHTLY SOLUBLE CHROMATES FROM THE CHLORATE SOLUTION, DISSOLVING THE CHROMATE PRECIPITATE IN HYDROCHLORIC ACID OR SULFURIC ACID, PRECIPITATING THE CATIONS FROM THE RESULTING ACID SOLUTION AS SLIGHTLY SOLUBLE SALTS, AND RETURNING THE RESIDUAL CHROMIUM-CONTAINING SOLUTION TO THE ELECTROLYSIS STEP.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE PREPARATION OF AN ALKALI METAL CHLORATE SOLUTION COMPRISING ELECTROLYZING AN ALKALI METAL CHLORIDE SOLUTION IN THE PRESENCE OF CHROMIUM SALTS TO PRODUCE AN ALKALI METAL CHLORATE SOLUTION, ADJUSTING THE PH TO SUCH A VALUE THAT THE PRINCIPAL PART OF OF THE CHROMIUM IS IN THE FORM OF CHROMATE IONS, PRECIPITATING THE CHROMATE IONS BY ADDITION OF CATIONS FORMING SLIGHTLY SOLUBLE CHROMATES, SEPARATING A PRECIPITATE OF THE SLIGHTLY SOLUBLE CHROMATES FROM THE CHLORATE SOLUTION, DISSOLVING THE CHROMATE PRECIPITATE IN HYDROCHLORIC ACID OR SULFURIC ACID, PRECIPITATING THE CATIONS FROM THE RESULTING ACID SOLUTION AS SLIGHTLY SOLUBLE SALTS, AND RETURNING THE RESIDUAL CHROMIUM-CONTAINING SOLUTION TO THE ELECTROLYSIS STEP.
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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |