Patent US2920936A successfully refreshed from Google Patents.
US2920936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of heavy metals from hydrocarbons
Assignee: Texaco Inc
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Filing: 1957-05-14
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Granted: 1960-01-12
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Expires: 1977-05-14
Abstract
No abstract record available.
Inventors
- 👤 Roger M Dille
- 👤 Ronald W Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:58
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/006; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR THE RECOVERY OF METAL VALUES FROM HYDROCARBON OILS CONTAINING NATURALLY-OCCURRING METAL CONSTITUENTS WHICH COMPRISES SUBJECTING SAID HYDROCARBON TO PARTIAL COMBUSTION WITH AN OXYGEN-CONTAINING GAS IN RELATIVE PROPORTIONS SUCH THAT AT LEAST 0.5 PERCENT OF THE CARBON CONTAINED IN SAID HYDROCARBON IS LIBERATED AS FREE CARBON TOGETHER WITH METAL CONSTITUENTS FROM SAID HYDROCARBON, SEPARATING SAID FREE CARBON CONTAINING METAL CONSTITUENTS FROM GASEOUS PRODUCTS OF REACTION, HEATING THE RECOVERED CARBON CONTAINING SAID METAL CONSTITUENTS TO A TEMPERATURE OF AT LEAST 220*F. BUT BELOW IGNITION TEMPERATURE IN AND OXIDIZING ATMOSPHERE EFFECTING CONVERSION OF SAID CONSTITUENTS TO WATER-SOLUBLE FORM COMPOUNDS OF SAID METALS, AND SUBJECTING THE RESULTING CARBON CONTAINING SAID WATER-SOLUBLE METAL COMPOUND TO AQUEOUS LEACHING IN ORDER TO SEPARATE SAID WATER-SOLUBLE METAL COMPOUNDS FROM SAID CARBON.
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE RECOVERY OF METAL VALUES FROM HYDROCARBON OILS CONTAINING NATURALLY-OCCURRING METAL CONSTITUENTS WHICH COMPRISES SUBJECTING SAID HYDROCARBON TO PARTIAL COMBUSTION WITH AN OXYGEN-CONTAINING GAS IN RELATIVE PROPORTIONS SUCH THAT AT LEAST 0.5 PERCENT OF THE CARBON CONTAINED IN SAID HYDROCARBON IS LIBERATED AS FREE CARBON TOGETHER WITH METAL CONSTITUENTS FROM SAID HYDROCARBON, SEPARATING SAID FREE CARBON CONTAINING METAL CONSTITUENTS FROM GASEOUS PRODUCTS OF REACTION, HEATING THE RECOVERED CARBON CONTAINING SAID METAL CONSTITUENTS TO A TEMPERATURE OF AT LEAST 220*F. BUT BELOW IGNITION TEMPERATURE IN AND OXIDIZING ATMOSPHERE EFFECTING CONVERSION OF SAID CONSTITUENTS TO WATER-SOLUBLE FORM COMPOUNDS OF SAID METALS, AND SUBJECTING THE RESULTING CARBON CONTAINING SAID WATER-SOLUBLE METAL COMPOUND TO AQUEOUS LEACHING IN ORDER TO SEPARATE SAID WATER-SOLUBLE METAL COMPOUNDS FROM SAID CARBON.
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |