US4024037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of cyanides
Assignee: National Research Development Corp UK
•
Filing: 1976-02-10
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Granted: 1977-05-17
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Expires: 1996-02-10
Abstract
Abstract The efficiency of electrochemical oxidation of cyanides is substantially improved by the presence of nickel ions. For example the addition of 10 - 3 molar nickel sulphate can triple the efficiency of the process. Nickel cyanide precipitates at the end of the reaction and is recovered and recycled.
Inventors
- 👤 Edmund Bishop
- 👤 David Timothy Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:10
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C01; C01C; C01C3/00; C01C3/08; C02F2101/00; C02F2101/10; C02F2101/16; C02F2101/18; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
32 words
In a process for the removal of cyanide from cyanide-containing solutions by electrolytic oxidation of the solution, the improvement comprising adding nickel ions to the solution to enhance the rate of oxidation.
Claim 2
Dependent Claim
32 words
In a process for the removal of cyanide from cyanide-containing solutions by electrolytic oxidation of the solution, the improvement comprising adding nickel ions to the solution to enhance the rate of oxidation.
Claim 3
Dependent Claim
21 words
The process according to claim 1, in which the concentration of nickel ions in the solution is at least 10-3 molar.
Claim 4
Dependent Claim
42 words
An electrolytic oxidation process for the removal of cyanide from a cyanide-containing solution, which comprises electrolyzing said solution between electrodes to oxidize the cyanide ions and complexes thereof and adding nickel ions to the solution to enhance the rate of said oxidation.
Claim 5
Dependent Claim
42 words
An electrolytic oxidation process for the removal of cyanide from a cyanide-containing solution, which comprises electrolyzing said solution between electrodes to oxidize the cyanide ions and complexes thereof and adding nickel ions to the solution to enhance the rate of said oxidation.
Claim 6
Dependent Claim
21 words
The process according to claim 3, in which the concentration of nickel ions in the solution is at least 10-3 molar.
Claim 7
Dependent Claim
24 words
The process according to claim 3, in which nickel cyanide precipitates at the end of the reaction which indicates completion of the oxidation reaction.
Claim 8
Dependent Claim
12 words
The process according to claim 3, in which platinum electrodes are used.
Claim 9
Dependent Claim
12 words
The process according to claim 3, in which carbon electrodes are used.
Claim 10
Dependent Claim
25 words
The process according to claim 3, wherein the nickel ions are added to the solution in the form of a salt soluble in said solution.
Claim 11
Dependent Claim
14 words
The process according to claim 8, in which the soluble salt is nickel sulfate.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |