Patent US4155983A successfully refreshed from Google Patents.
US4155983A
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Gold recovery by adsorption from ozonized cyanidation liquor
Assignee: Individual
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Filing: 1977-10-19
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Granted: 1979-05-22
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Expires: 1997-10-19
Abstract
Abstract A process for recovering gold from a gold bearing liquor arising from a cyanidation process including the steps of treating the liquor with ozonized air or ozonized oxygen, adsorbing the gold values from the treated liquor on activated carbon, and recovering the gold values from the loaded activated carbon.
Inventors
- 👤 Wojciech J. Zaleski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:14
CPC Classifications
C; C01; C01G; C01G7/00; C01G7/003
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
A process for recovering gold from a gold bearing liquor arising from a cyanidation process and containing gold, silver and base metal values, organic matter and free cyanide, including the steps of treating the liquor with ozonized air or ozonized oxygen thereby precipitating silver and base metal values, oxidizing the organic matter and decreasing the concentration of free cyanide in the liquor; adsorbing the gold values from the treated liquor on to activated carbon; and recovering the gold values from the loaded activated carbon.
Claim 2
Dependent Claim
84 words
A process for recovering gold from a gold bearing liquor arising from a cyanidation process and containing gold, silver and base metal values, organic matter and free cyanide, including the steps of treating the liquor with ozonized air or ozonized oxygen thereby precipitating silver and base metal values, oxidizing the organic matter and decreasing the concentration of free cyanide in the liquor; adsorbing the gold values from the treated liquor on to activated carbon; and recovering the gold values from the loaded activated carbon.
Claim 3
Dependent Claim
27 words
A process according to claim 1 wherein the pretreatment is continued until the pH value of the liquor has been reduced to a value below approximately 8.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |