Patent US3047361A successfully refreshed from Google Patents.
US3047361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction of tungsten values from materials containing same
Assignee: EIDP Inc
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Filing: 1961-09-11
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Granted: 1962-07-31
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Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Harold M Hubbard
- 👤 John H Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:05
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS FOR THE EXTRACTION OF TUNGSTEN VALUES FROM TUNGSTEN-BEARING ORES, MINERALS, ORE LEACHES, ORE CONCENTRATES AND THE LIKE WHICH COMPRISES HEATING THE TUNGSTENCONTAINING MATERIAL TO A TEMPERATURE BETWEEN 80*C. AND THE BOILING POINT OF THE MASS WITH A STRONG MINERAL ACID COMPOSITION WHICH CONSISTS OF AT LEAST IN PART OF ORTHOPHOSPHORIC ACID TO FORM A HETEROPOLY PHOSPHOTUNGSTIC ACID COMPLEX, SAID ACID COMPOSITION BEING PRESENT IN AN AMOUNT SUCH THAT THE PH OF THE RESULTANT ACIDIC MASS IS NOT GREATER THAN ABOUT 2, SEPARATING THE PHOSPHOTUNGSTIC ACID COMPLEX FROM THE ACIDIC REACTION MASS BY EXTRACTION WITH AN OXYGENATED POLAR ORGANIC SOLVENT WHICH PREFERENTIALLY TAKES UP THE PHOSPHOTUNGSTIC ACID COMPLEX AND DECOMPOSING SAID PHOSPHOTUNGSTIC ACID COMPLEX INTO SEPARATE TUNGSTATE AND PHOSPHATE COMPONENTS BY CONTACTING THE ORGANIC SOLUTION OF THE PHOSPHOTUNGSTIC ACID COMPLEX WITH AN AQUEOUS ALKALINE SOLUTION HAVING SUFFICIENT BASE CAPACITY TO RAISE THE PH OF THE MASS TO ABOVE ABOUT 7, SAID TUNGSTATE AND PHOSPHATE COMPONENTS PASSING INTO THE AQUEOUS PHASE.
Claim 2
Dependent Claim
161 words
A PROCESS FOR THE EXTRACTION OF TUNGSTEN VALUES FROM TUNGSTEN-BEARING ORES, MINERALS, ORE LEACHES, ORE CONCENTRATES AND THE LIKE WHICH COMPRISES HEATING THE TUNGSTENCONTAINING MATERIAL TO A TEMPERATURE BETWEEN 80*C. AND THE BOILING POINT OF THE MASS WITH A STRONG MINERAL ACID COMPOSITION WHICH CONSISTS OF AT LEAST IN PART OF ORTHOPHOSPHORIC ACID TO FORM A HETEROPOLY PHOSPHOTUNGSTIC ACID COMPLEX, SAID ACID COMPOSITION BEING PRESENT IN AN AMOUNT SUCH THAT THE PH OF THE RESULTANT ACIDIC MASS IS NOT GREATER THAN ABOUT 2, SEPARATING THE PHOSPHOTUNGSTIC ACID COMPLEX FROM THE ACIDIC REACTION MASS BY EXTRACTION WITH AN OXYGENATED POLAR ORGANIC SOLVENT WHICH PREFERENTIALLY TAKES UP THE PHOSPHOTUNGSTIC ACID COMPLEX AND DECOMPOSING SAID PHOSPHOTUNGSTIC ACID COMPLEX INTO SEPARATE TUNGSTATE AND PHOSPHATE COMPONENTS BY CONTACTING THE ORGANIC SOLUTION OF THE PHOSPHOTUNGSTIC ACID COMPLEX WITH AN AQUEOUS ALKALINE SOLUTION HAVING SUFFICIENT BASE CAPACITY TO RAISE THE PH OF THE MASS TO ABOVE ABOUT 7, SAID TUNGSTATE AND PHOSPHATE COMPONENTS PASSING INTO THE AQUEOUS PHASE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |