US3063796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ammonium metavanadate
Assignee: Union Carbide Corp
•
Filing: 1961-03-03
•
Granted: 1962-11-13
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
- 👤 Andrew D Kelmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:23
CPC Classifications
C; C01; C01G; C01G31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY PURE AMMONIUM METAVANADATE FROM ACIDIC VANADYL SOLUTIONS CONTAINING AT LEAST ONE OG THE IMPURITIES IRON, ALUMINA PHOSPHATE AND ARSENATES COMPRISING PROVIDING A SOLUTION CONTAINING SODIUM CHLORATE AND SODIUM CARBONATE, SAID SODIUM CHLORATE BEING PRESENT IN AMOUNTS AT LEAST SUFFICIENT TO OXIDIZE SUBSTANTIALY ALL VANADIUM IN SAID VANADYL SOLUTION TO PENTAVALENT FORM AND SAID SODIUM CARBONATE BEING PRESENT IN AMOUNTS SUFFICIENT TO ADJUST THE PH OF SAID ACIDIC VANADYL SOLUTION TO ABOUT 7.0; ADDING SAID ACIDIC VANADYL SOLUTION TO SAID SOLUTION CONTAINING SODIUM CARBONATE AND SODIUM CHLORATE; DIGESTING SAID SOLUTION AT A TEMPERATURE RANGING FROM 70 TO 90 DEGREES CENTIGRADE FOR A PERIOD OF TIME SUFFICIENT TO SUSTAIN VANADIUM IN SOLUTION AND TO ALLOW PRECIPATION OF SAID IMPURITIES; FILTERING THE PRECIPITATED IMPURITIES FROM SAID SOLUTION, ADDING TO SAID SOLUTION AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE AND AMMONIUM SULFATE TO CAUSE PRECIPITATION OF SUBSTANTIALLY PURE AMMONIUM METAVANADATE; AND REMOVING SAID AMMONIUM METAVANADATE FROM SAID SOLUTION.
Claim 2
Dependent Claim
166 words
A PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY PURE AMMONIUM METAVANADATE FROM ACIDIC VANADYL SOLUTIONS CONTAINING AT LEAST ONE OG THE IMPURITIES IRON, ALUMINA PHOSPHATE AND ARSENATES COMPRISING PROVIDING A SOLUTION CONTAINING SODIUM CHLORATE AND SODIUM CARBONATE, SAID SODIUM CHLORATE BEING PRESENT IN AMOUNTS AT LEAST SUFFICIENT TO OXIDIZE SUBSTANTIALY ALL VANADIUM IN SAID VANADYL SOLUTION TO PENTAVALENT FORM AND SAID SODIUM CARBONATE BEING PRESENT IN AMOUNTS SUFFICIENT TO ADJUST THE PH OF SAID ACIDIC VANADYL SOLUTION TO ABOUT 7.0; ADDING SAID ACIDIC VANADYL SOLUTION TO SAID SOLUTION CONTAINING SODIUM CARBONATE AND SODIUM CHLORATE; DIGESTING SAID SOLUTION AT A TEMPERATURE RANGING FROM 70 TO 90 DEGREES CENTIGRADE FOR A PERIOD OF TIME SUFFICIENT TO SUSTAIN VANADIUM IN SOLUTION AND TO ALLOW PRECIPATION OF SAID IMPURITIES; FILTERING THE PRECIPITATED IMPURITIES FROM SAID SOLUTION, ADDING TO SAID SOLUTION AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE AND AMMONIUM SULFATE TO CAUSE PRECIPITATION OF SUBSTANTIALLY PURE AMMONIUM METAVANADATE; AND REMOVING SAID AMMONIUM METAVANADATE FROM SAID SOLUTION.
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) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |