US3397056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of aluminum from impure aluminum sources
Assignee: Dow Chemical Co
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Filing: 1965-11-15
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Granted: 1968-08-13
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Expires: 1985-11-15
Abstract
No abstract record available.
Inventors
- 👤 Gilbert S Layne
- 👤 James O Huml
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/06; C22B21/062; C22B5/00; C22B5/02; C22B5/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
AN IMPROVED PROCESS FOR THE PURIFICATION OF AN IMPURE ALUMINUM SOURCE WHICH COMPRISES (1) HEATING IN A REACTION ZONE AT AN ABSOLUTE PRESSURE ABOVE ABOUT 100 MM. OF MERCURY A MOLTEN MIXTURE OF AN IMPURE ALUMINUM SOURCE AND A METAL FLUORIDE ADJUVANT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM FLUORIDE AND MIXTURES OF ALUMINUM FLUORIDE WITH AT LEAST ONE OF SODIUM FLUORIDE, POTASSIUM FLUORIDE, CALCIUM FLUORIDE, AND MAGNESIUM FLUORIDE TO A TEMPERATURE OF FROM THE MELTING POINT OF THE METAL FLUORIDE ADJUVANT TO THE BOILING POINT OF THE LOWEST BOILING COMPONENT INTRODUCED INTO THE REACTLION MIXTURE AT THE PRESSURE EMPLOYED TO VAPORIZE PRODUCTS THEREFROM, (2) CONDENSING THE VAPORIZED PRODUCTS AS LIQUIDS IN A QUIESCENT ZONE, AND (3) ALLOWING THE LIQUID ALUMINUM TO COALESCE INTO A PHASE DISCRETE FROM THE METAL FLUORIDE PHASE.
Claim 2
Dependent Claim
132 words
AN IMPROVED PROCESS FOR THE PURIFICATION OF AN IMPURE ALUMINUM SOURCE WHICH COMPRISES (1) HEATING IN A REACTION ZONE AT AN ABSOLUTE PRESSURE ABOVE ABOUT 100 MM. OF MERCURY A MOLTEN MIXTURE OF AN IMPURE ALUMINUM SOURCE AND A METAL FLUORIDE ADJUVANT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM FLUORIDE AND MIXTURES OF ALUMINUM FLUORIDE WITH AT LEAST ONE OF SODIUM FLUORIDE, POTASSIUM FLUORIDE, CALCIUM FLUORIDE, AND MAGNESIUM FLUORIDE TO A TEMPERATURE OF FROM THE MELTING POINT OF THE METAL FLUORIDE ADJUVANT TO THE BOILING POINT OF THE LOWEST BOILING COMPONENT INTRODUCED INTO THE REACTLION MIXTURE AT THE PRESSURE EMPLOYED TO VAPORIZE PRODUCTS THEREFROM, (2) CONDENSING THE VAPORIZED PRODUCTS AS LIQUIDS IN A QUIESCENT ZONE, AND (3) ALLOWING THE LIQUID ALUMINUM TO COALESCE INTO A PHASE DISCRETE FROM THE METAL FLUORIDE PHASE.
Claim 3
Dependent Claim
108 words
A PROCESS FOR THE REMOVAL OF OXIDE AND HEAVY METAL CONTAMINANTS FROM MAGNESIUM FLUORIDE WHICH COMPRISES (1) HEATING IN A REACTION ZONE AT AN ABSOLUTE PRESSURE FROM ABOUT 100 TO 1000 MM. OF MERCURY ABSOLUTE, A MOLTEN MIXTURE OF AN IMPURE ALUMINUM SOURCE AND A MAGNESIUM FLUORIDE CONTAINING SAID OXIDE OR HEAVY METAL IMPURITIES AT A TEMPERATURE OF BETWEEN ABOUT 1300 AND 1750*C., (2) CONDENSING THE VAPORIZED PRODUCTS AS LIQUIDS IN A QUIESCENT ZONE, (3) ALLOWING THE MAGNESIUM FLUORIDE PHASE TO SEPARATE FROM THE ALUMINUM PHASE, AND (4) WHILE MAINTAINING AT LEAST THE ALUMINUM PHASE IN THE LIQUID STATE SEPARATING THE PHASES TO PRODUCE A PURIFIED MAGNESIUM FLUORIDE.
Claim 4
Dependent Claim
108 words
A PROCESS FOR THE REMOVAL OF OXIDE AND HEAVY METAL CONTAMINANTS FROM MAGNESIUM FLUORIDE WHICH COMPRISES (1) HEATING IN A REACTION ZONE AT AN ABSOLUTE PRESSURE FROM ABOUT 100 TO 1000 MM. OF MERCURY ABSOLUTE, A MOLTEN MIXTURE OF AN IMPURE ALUMINUM SOURCE AND A MAGNESIUM FLUORIDE CONTAINING SAID OXIDE OR HEAVY METAL IMPURITIES AT A TEMPERATURE OF BETWEEN ABOUT 1300 AND 1750*C., (2) CONDENSING THE VAPORIZED PRODUCTS AS LIQUIDS IN A QUIESCENT ZONE, (3) ALLOWING THE MAGNESIUM FLUORIDE PHASE TO SEPARATE FROM THE ALUMINUM PHASE, AND (4) WHILE MAINTAINING AT LEAST THE ALUMINUM PHASE IN THE LIQUID STATE SEPARATING THE PHASES TO PRODUCE A PURIFIED MAGNESIUM FLUORIDE.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |