US4320097A
Expired / Lapsed
US
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Recovery of vanadium from acidic solutions thereof
Assignee: FMC Corp
•
Filing: 1980-09-29
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Granted: 1982-03-16
•
Expires: 2000-09-29
Abstract
Abstract Vanadium is recovered from sulfuric acid leach liquor by oxidizing the vanadium with hydrogen peroxide in the presence of iron ions and extracting the oxidized vanadium with an amine solvent system.
Inventors
- 👤 Richard A. Brown
- 👤 Myles Fixman
- 👤 Dale L. Lesher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:14
CPC Classifications
C; C01; C01G; C01G31/00; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/40; C22B3/402; C22B3/409; C22B34/00; C22B34/20; C22B34/22; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
The process for the oxidation of vanadium in aqueous sulfuric acid leach liquors comprising treating the solution with hydrogen peroxide in the presence of an effective amount of iron ions in the range of about 0.1 to about 20 g/l, the hydrogen peroxide at a given time being maintained at a level not substantially exceeding the rate at which it is being consummed in the oxidation of the vanadium.
Claim 2
Dependent Claim
69 words
The process for the oxidation of vanadium in aqueous sulfuric acid leach liquors comprising treating the solution with hydrogen peroxide in the presence of an effective amount of iron ions in the range of about 0.1 to about 20 g/l, the hydrogen peroxide at a given time being maintained at a level not substantially exceeding the rate at which it is being consummed in the oxidation of the vanadium.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the strength by weight of the hydrogen peroxide is from about 1% to about 50%.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the amount of iron ions is about 7 to 11 g/l.
Claim 5
Dependent Claim
26 words
The process of claim 3 wherein the oxidation is carried out at about 25° to 50° C. and at a pH of about 1.8 to 2.2.
Claim 6
Dependent Claim
106 words
The process for the recovery of vanadium from sulfuric acid leach liquor in which part of the vanadium exists in the +4 valence state, comprising adding to the leach liquor in the presence of an effective amount of iron ions, in the range of about 0.1 to about 20 g/l, an aqueous hydrogen peroxide having a strength of about 1% to 50%, the rate of addition of said peroxide not substantially exceeding the rate at which it is being consummed in the oxidation whereby the vanadium is oxidized to the +5 valence state and extracting the oxidized vanadium from the leach liquor with an amine extractant.
Claim 7
Dependent Claim
106 words
The process for the recovery of vanadium from sulfuric acid leach liquor in which part of the vanadium exists in the +4 valence state, comprising adding to the leach liquor in the presence of an effective amount of iron ions, in the range of about 0.1 to about 20 g/l, an aqueous hydrogen peroxide having a strength of about 1% to 50%, the rate of addition of said peroxide not substantially exceeding the rate at which it is being consummed in the oxidation whereby the vanadium is oxidized to the +5 valence state and extracting the oxidized vanadium from the leach liquor with an amine extractant.
Claim 8
Dependent Claim
25 words
The process of claim 5 wherein the oxidation is carried out at about 25° to 30° C. at a pH of about 1.8 to 2.2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |