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US3865703A
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Electrowinning with an anode having a multicomponent coating
Assignee: ELECTRODE Corp A CORP OF
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Filing: 1973-04-19
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Granted: 1975-02-11
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Expires: 1993-04-19
Abstract
Abstract Described is a process for winning metals from aqueous acidic solutions by passing an electrolyzing current between a cathode and an anode, which anode comprises a conductive substrate bearing on the surface thereof a coating of the mixed oxides of tin, antimony, at least one platinum group metal, and a valve metal selected from the group titanium and tantalum.
Inventors
- 👤 Barry A Schenker
- 👤 James M Kolb
- 👤 Charles R Franks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:45
CPC Classifications
C; C25; C25C; C25C1/00; C25C7/00; C25C7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
IN A PROCESS FOR THE ELECTROWINNING OF METALS FROM AQUEOUS ACIDIC SOLUTIONS THEREOF, THE IMPROVEMENT THAT CONSISTS ESSENTIALLY OF PASSING AN ELECTROLYZING CURRENT BETWEEN A CATHODE AND AN OPPOSED OXYGEN EVOLVING ANODE, SAID ANODE COMPRISING AN ELECTRICALLY CONDUCTIVE SUPPORTING SUBSTRATE BEARING ON AT LEAST A PORTION OF THE SURFACE THEREOF A COATING CONSISTING ESSENTIALLY OF FROM 1.0 TO 10 PERCENT ANTIMONY OXIDE, AS SB2O3, ON A WEIGHT BASIS, FROM 30 TO 90 PERCENT SNO2, FROM 1.0 TO 50 PERCENT OF AT LEAST ONE PLATINUM GROUP METAL OXIDE, AND FROM 15 TO 25 PERCENT OF A VALVE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND TANTALUM OXIDES, WITH THE PROVISO THAT THE MOLE RATIO OF TIN TO ANTIMONY OXIDES IS BETWEEN 95:5 AND 85:15.
Claim 2
Dependent Claim
125 words
IN A PROCESS FOR THE ELECTROWINNING OF METALS FROM AQUEOUS ACIDIC SOLUTIONS THEREOF, THE IMPROVEMENT THAT CONSISTS ESSENTIALLY OF PASSING AN ELECTROLYZING CURRENT BETWEEN A CATHODE AND AN OPPOSED OXYGEN EVOLVING ANODE, SAID ANODE COMPRISING AN ELECTRICALLY CONDUCTIVE SUPPORTING SUBSTRATE BEARING ON AT LEAST A PORTION OF THE SURFACE THEREOF A COATING CONSISTING ESSENTIALLY OF FROM 1.0 TO 10 PERCENT ANTIMONY OXIDE, AS SB2O3, ON A WEIGHT BASIS, FROM 30 TO 90 PERCENT SNO2, FROM 1.0 TO 50 PERCENT OF AT LEAST ONE PLATINUM GROUP METAL OXIDE, AND FROM 15 TO 25 PERCENT OF A VALVE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND TANTALUM OXIDES, WITH THE PROVISO THAT THE MOLE RATIO OF TIN TO ANTIMONY OXIDES IS BETWEEN 95:5 AND 85:15.
Claim 3
Dependent Claim
28 words
A process as in claim 1 wherein the metal to be won is selected from the group consisting of copper, zinc, cobalt, iron, nickel, manganese, cadmium, and chromium.
Claim 4
Dependent Claim
58 words
A process as in claim 1 wherein the anode coating consists essentially of from 4.0 to 8.0 percent Sb2O3, from 30 to 50 percent SnO2, from 20 to 40 percent of at least one platinum metal oxide, and from 15 to 25 percent of a valve metal oxide selected from the group consisting of titanium and tantalum oxides.
Claim 5
Dependent Claim
127 words
A process for winning copper from an acidic aqueous copper sulfate solution, which process comprises passing an electrolyzing current through said solution between a copper sheet cathode and an opposed oxygen evolving anode, which anode comprises an electrically conductive supporting substrate bearing on at least a portion of the surface thereof a coating consisting essentially of from 1.0 to 10 percent antimony oxide, as Sb2O3, on a weight basis, from 30 to 90 percent SnO2, from 1.0 to 50 percent of at least one platinum group metal oxide, and from 15 to 25 percent of a valve metal oxide selected from the group consisting of titanium and tantalum oxides, with the proviso that the mole ratio of tin to antimony oxides is between 95:5 and 85: 15.
Claim 6
Dependent Claim
127 words
A process for winning copper from an acidic aqueous copper sulfate solution, which process comprises passing an electrolyzing current through said solution between a copper sheet cathode and an opposed oxygen evolving anode, which anode comprises an electrically conductive supporting substrate bearing on at least a portion of the surface thereof a coating consisting essentially of from 1.0 to 10 percent antimony oxide, as Sb2O3, on a weight basis, from 30 to 90 percent SnO2, from 1.0 to 50 percent of at least one platinum group metal oxide, and from 15 to 25 percent of a valve metal oxide selected from the group consisting of titanium and tantalum oxides, with the proviso that the mole ratio of tin to antimony oxides is between 95:5 and 85: 15.
Claim 7
Dependent Claim
50 words
A process as in claim 4 wherein the copper content of the solution is between 25 and 50 gpl, the pH of the solution is less than 2.0, the temperature of operation is between 30* and 65* C, and the electrolyzing current is within the range 15 to 100 asf.
Claim 8
Dependent Claim
58 words
A process as in claim 4 wherein the anode coating consists essentially of from 4.0 to 8.0 percent Sb2O3, from 30 to 50 percent SnO2, from 20 to 40 percent of at least one platinum metal oxide, and from 15 to 25 percent of a valve metal oxide selected from the group consisting of titanium and tantalum oxides.
References Cited (Backward Citations)
US3701724A
Cited
US3775284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |