US3413082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering zr-values from ores
Assignee: PPG Industries Inc
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Filing: 1962-11-13
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Granted: 1968-11-26
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 William H Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:03
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN THE METHOD OF SEPARATING THE ZIRCONIUM FROM THE ZIRCONIUM-SILICA BEARING ORE WHICH INVOLVES HEATING THE ORE AT ELEVATED TEMPERATURE WITH AN ALKALI SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDE AND ALKALI METAL CARBONATE TO CONVERT A SUBSTANTIAL PORTION OF THE SILICA TO WATER SOLUBLE FORM AND PRODUCE A WATER INSOLUBLE ALKALI METAL ZIRCONIUM COMPONENT, LEACHING SUCH WATER SOLUBLE FORM OF SILICA FROM THE ALKALI METAL ZIRCONATE TO LEAVE A SILICA LEAN ALKALI METAL ZIRCONATE RESIDUE AND THEREAFTER DISSOLVING SUCH ALKALI METAL ZIRCONATE RESIDUE IN ACID TO SOLUBILIZE ZIRCONIUM, THE IMPROVEMENT WHEREIN A COMPOUND HAVING A METAL CATION, A SILICATE OF WHICH METAL CATION IS WATER INSOLUBLE, IS ADDED TO THE RESIDUE, THE RESULTING MIXTURE IS HEATED PRIOR TO DISSOLVING IN ACID TO SOLUBLIZE THE ZICONIUM, WHEREBY TO OBTAIN AN ACID SOLUTION OF ZIRCONIUM CONTAINING A SEPARABLE SOLID PHASE OF SILICA AND SUCH SOLID PHASE SILICA IS SEPARATED THEREFROM.
Claim 2
Dependent Claim
151 words
IN THE METHOD OF SEPARATING THE ZIRCONIUM FROM THE ZIRCONIUM-SILICA BEARING ORE WHICH INVOLVES HEATING THE ORE AT ELEVATED TEMPERATURE WITH AN ALKALI SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDE AND ALKALI METAL CARBONATE TO CONVERT A SUBSTANTIAL PORTION OF THE SILICA TO WATER SOLUBLE FORM AND PRODUCE A WATER INSOLUBLE ALKALI METAL ZIRCONIUM COMPONENT, LEACHING SUCH WATER SOLUBLE FORM OF SILICA FROM THE ALKALI METAL ZIRCONATE TO LEAVE A SILICA LEAN ALKALI METAL ZIRCONATE RESIDUE AND THEREAFTER DISSOLVING SUCH ALKALI METAL ZIRCONATE RESIDUE IN ACID TO SOLUBILIZE ZIRCONIUM, THE IMPROVEMENT WHEREIN A COMPOUND HAVING A METAL CATION, A SILICATE OF WHICH METAL CATION IS WATER INSOLUBLE, IS ADDED TO THE RESIDUE, THE RESULTING MIXTURE IS HEATED PRIOR TO DISSOLVING IN ACID TO SOLUBLIZE THE ZICONIUM, WHEREBY TO OBTAIN AN ACID SOLUTION OF ZIRCONIUM CONTAINING A SEPARABLE SOLID PHASE OF SILICA AND SUCH SOLID PHASE SILICA IS SEPARATED THEREFROM.
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |