US4150092A
Expired / Lapsed
US
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Process for recovering vanadium values from acidic chloride solutions
Assignee: BASF Catalysts LLC
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Filing: 1977-10-21
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Granted: 1979-04-17
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Expires: 1997-10-21
Abstract
Abstract The present invention provides a method for recovering vanadium from ferruginous chloride solutions by liquid-liquid extraction (or liquid ion exchange). Such chloride solutions are obtained in the extraction of vanadium from vanadiferous residues arising from the chlorination of titaniferous ores and in the extraction of vanadium from vanadiferous minerals. These solutions contain chlorides of vanadium, aluminum, iron, manganese and chromium. The method comprises adding sulfate ions to the chloride solution and recovering the vanadium by liquid-liquid extraction. By adjusting the sulfate-additive in relation to the concentrations of vanadium, iron and chloride in the solution vanadium can be exhausted substantially free from iron.
Inventors
- 👤 Frank Pitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:13
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/14; C01; C01G; C01G31/00; C01G31/003; C22B34/20; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
In a process for the recovery of vanadium from aqueous acidic ferruginous chloride solutions containing vanadium in the pentavalent state and iron in anionic form as a chloride complex by transfer of said vanadium into an organic solution of an organic amine or quaternary ammonium compound at a pH in the range of 1.4 to 3.0 and stripping the extracted vanadium with an aqueous strip liquid to recover the vanadium in aqueous solution, the improvement, whereby the vanadium is transferred from said chloride solution into said organic solution without preliminary removal of chloride ions, which comprises the steps of (a) adding a source of sulfate ions to said aqueous acidic ferruginous chloride solution; (b) adjusting the pH if necessary to a value in the range of 1.4 to 3.0; (c) contacting the solution from step (b) with said organic solution of an organic amine or quarternary ammonium compound whereby vanadate ions are transferred from the aqueous phase into the organic phase and iron, chloride and sulfate remain in the aqueous phase; (d) separating said phases, from step (c), thereby producing (e) an organic phase containing vanadium from which vanadium is stripped and recovered and (f) a spent chloride aolution.
Claim 2
Dependent Claim
199 words
In a process for the recovery of vanadium from aqueous acidic ferruginous chloride solutions containing vanadium in the pentavalent state and iron in anionic form as a chloride complex by transfer of said vanadium into an organic solution of an organic amine or quaternary ammonium compound at a pH in the range of 1.4 to 3.0 and stripping the extracted vanadium with an aqueous strip liquid to recover the vanadium in aqueous solution, the improvement, whereby the vanadium is transferred from said chloride solution into said organic solution without preliminary removal of chloride ions, which comprises the steps of (a) adding a source of sulfate ions to said aqueous acidic ferruginous chloride solution; (b) adjusting the pH if necessary to a value in the range of 1.4 to 3.0; (c) contacting the solution from step (b) with said organic solution of an organic amine or quarternary ammonium compound whereby vanadate ions are transferred from the aqueous phase into the organic phase and iron, chloride and sulfate remain in the aqueous phase; (d) separating said phases, from step (c), thereby producing (e) an organic phase containing vanadium from which vanadium is stripped and recovered and (f) a spent chloride aolution.
Claim 3
Dependent Claim
29 words
The process of claim 1, wherein said source of sulfate ions is selected from the group consisting of sulfuric acid, magnesium sulfate, sodium sulfate, potassium sulfate and ammonium sulfate.
Claim 4
Dependent Claim
14 words
The process of claim 2, wherein said source of sulfate ions is magnesium sulfate.
Claim 5
Dependent Claim
153 words
The process of claim 1, wherein said source of sulfate added in step (a) is magnesium sulfate; in step (b) pH is increased to a value in the range of 1.4 to 3.0 by addition of a material selected from the group consisting of magnesium oxide, magnesium hydroxide, magnesium carbonate, and mixtures thereof, whereby said spent chloride solution (f) contains ions of sulfate, chloride, magnesium, and iron; iron is precipitated from said spent chloride solution (f) by adding thereto a basic magnesium compound selected from the group consisting of magnesium oxide, magnesium hydroxide, magnesium carbonate or mixtures thereof, whereby the solution remaining after precipitation of iron from said spent chloride solution contains magnesium sulfate and magnesium chloride; separating said precipitate from solution, and evaporating said solution until hydrated magnesium sulfate crystallizes on cooling and is separated from the mother liquid which comprises a solution of magnesium chloride; and recovering said crystallized magnesium sulfate.
Claim 6
Dependent Claim
30 words
The process of claim 4, wherein said recovered hydrated magnesium sulfate is recycled and used as the source of sulfate ions added to said ferruginous chloride solution in step (a).
Claim 7
Dependent Claim
43 words
The process of claim 1, wherein said aqueous ferruginous chloride solution contains one or more metals of the group consisting of aluminum, chromium, and manganese, which metal remains with iron during the steps (a), (b), (c), (d), (e), and (f), of said process.
Claim 8
Dependent Claim
55 words
The process of claim 1, wherein the quantity of sulfate ions added in step (a) depends upon the concentration of chloride ions and the relative proportions of iron and vanadium in said acidic aqueous ferruginous chloride solution and is used in amounts sufficient to avoid coextraction of iron in said organic phase in step (c).
Claim 9
Dependent Claim
18 words
The process of claim 1, where pH is in the range of 1.4 to 2.6 in step (b).
Claim 10
Dependent Claim
18 words
The process of claim 1, wherein pH is in the range of 1.5 to 2.6 in step (b).
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |