US3305322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium recovery process employing so2 gas as the oxidizer
Assignee: Hazen Research Inc
•
Filing: 1963-12-23
•
Granted: 1967-02-21
•
Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Angus V Henrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:19
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE PROCESS FOR THE RECOVERY OF VANADIUM FROM MATERIAL IN WHICH AT LEAST PART OF THE VANADIUM EXISTS IN THE +4 STATE WHICH COMPRISES: COMMINUTING THE MATERIAL; LEACHING THE MATERIAL TO FORM A LEACH SOLUTION OF THE VANADIUM; CONTACTING THE LEACH SOLUTION WITH AIR AND SO2 IN A RATION OF NOT MORE THAN ABOUT 7 MOLE PERCENT OF SO2 TO AIR AT A PH BETWEEN ABOUT 1 AND THE PRECIPITATION POINT OF FERRIC VANADATE IN THE PRESENCE OF FERRIC IRON IN SOLUTION TO OXIDIZE THE VANADIUM TO THE +5 STATE; EXTRACTING THE VANADIUM FROM THE LEACH SOLUTION WITH AN AMINE EXTRACTANT; STRIPPING THE VANADIUM FROM THE EXTRACTANT; AND RECOVERING THE VANADIUM IN THE +5 STATE.
Claim 2
Dependent Claim
115 words
THE PROCESS FOR THE RECOVERY OF VANADIUM FROM MATERIAL IN WHICH AT LEAST PART OF THE VANADIUM EXISTS IN THE +4 STATE WHICH COMPRISES: COMMINUTING THE MATERIAL; LEACHING THE MATERIAL TO FORM A LEACH SOLUTION OF THE VANADIUM; CONTACTING THE LEACH SOLUTION WITH AIR AND SO2 IN A RATION OF NOT MORE THAN ABOUT 7 MOLE PERCENT OF SO2 TO AIR AT A PH BETWEEN ABOUT 1 AND THE PRECIPITATION POINT OF FERRIC VANADATE IN THE PRESENCE OF FERRIC IRON IN SOLUTION TO OXIDIZE THE VANADIUM TO THE +5 STATE; EXTRACTING THE VANADIUM FROM THE LEACH SOLUTION WITH AN AMINE EXTRACTANT; STRIPPING THE VANADIUM FROM THE EXTRACTANT; AND RECOVERING THE VANADIUM IN THE +5 STATE.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |