US3384475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum refining
Assignee: Alcan Research and Development Ltd
•
Filing: 1965-09-08
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Granted: 1968-05-21
•
Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Norman W F Phillips
- 👤 Southam Frederick William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:46
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/20; C22; C22B; C22B21/00; C22B21/0038; C22B21/0046
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
AN IMPROVED SUBHALIDE DISTILLATION PROCESS FOR THE RECOVERY OF ALUMINUM COMPRISING THE STEPS OF PASSING A NORMAL HALIDE OF ALUMINUM IN PREHEATED GASEOUS FORM THROUGH DIVIDED SOLID IMPURE ALUMINUM BEARING MATERIAL WHILE SUPPLYING HEAT THERETO SO THAT AT LEAST A PORTION OF THE GASEOUS HALIDE REACTS WITH THE ALUMINUM IN THE MATERIAL TO PRODUCE A GASEOUS ALUMINUM SUBHALIDE, REMOVING THE SUBHALIDE CONTAINING GAS AND DECOMPOSING IT AT A LOWER TEMPERATURE TO OBTAIN THE REVERSE REACTION IN WHICH THE SUBHALIDE REVERTS TO THE NORMAL ALUMINUM HALIDE AND RELEASE PURE ALUMINUM, AND HTEN PASSING AT LEAST A PORTION OF THE DECOMPOSED GASES THROUGH A NEW CHARGE OF THE SOLID IMPURE ALUMINUM BEARING MATERIAL FOR THE PREHEATING THEREOF PRIOR TO REACTION WITH THE PREHEATED NORMAL HALIDE.
Claim 2
Dependent Claim
123 words
AN IMPROVED SUBHALIDE DISTILLATION PROCESS FOR THE RECOVERY OF ALUMINUM COMPRISING THE STEPS OF PASSING A NORMAL HALIDE OF ALUMINUM IN PREHEATED GASEOUS FORM THROUGH DIVIDED SOLID IMPURE ALUMINUM BEARING MATERIAL WHILE SUPPLYING HEAT THERETO SO THAT AT LEAST A PORTION OF THE GASEOUS HALIDE REACTS WITH THE ALUMINUM IN THE MATERIAL TO PRODUCE A GASEOUS ALUMINUM SUBHALIDE, REMOVING THE SUBHALIDE CONTAINING GAS AND DECOMPOSING IT AT A LOWER TEMPERATURE TO OBTAIN THE REVERSE REACTION IN WHICH THE SUBHALIDE REVERTS TO THE NORMAL ALUMINUM HALIDE AND RELEASE PURE ALUMINUM, AND HTEN PASSING AT LEAST A PORTION OF THE DECOMPOSED GASES THROUGH A NEW CHARGE OF THE SOLID IMPURE ALUMINUM BEARING MATERIAL FOR THE PREHEATING THEREOF PRIOR TO REACTION WITH THE PREHEATED NORMAL HALIDE.
Claim 3
Dependent Claim
156 words
IN APPARATUS FOR SUBHALIDE REFINING OF ALUMINUM, IN COMBINATION, A REFINING SYSTEM COMPRISING A PREHEATER ARRANGED TO RECEIVE ALUMINUM-CONTAINING CHARGE MATERIAL AND HAVING GAS INLET AND OUTLET MEANS, A CONVERTER CONNECTED AND ARRANGED TO RECEIVE SAID CHARGE MATERIAL AFTER PREHEATING IN SAID PREHEATER AND HAVING GAS INLET AND OUTLET MEANS FOR PASSAGE OF HALIDE GAS TO REACT WITH ALUMINUM OF THE CHARGE MATERIAL AT HIGH TEMPERATURE, A DECOMPOSER HAVING GAS INLET AND OUTLET MEANS WITH SAID GAS INLET MEANS CONNECTED WITH THE GAS OUTLET OF THE CONVERTER AND ARRANGED TO RECEIVE REACTED GAS THEREFROM FOR DEPOSITING PURE ALUMINUM METAL AND DISCHARGING HALIDE GAS, THE GAS INLET MEANS OF SAID PREHEATER BEING CONNECTED WITH THE GAS OUTLET MEANS OF SAID DECOMPOSER TO RECEIVE AT LEAST A PORTION OF THE HALIDE GAS DISCHARGED THEREFROM, SAID PREHEATER BEING OPERABLE TO CIRCULATE SAID HALIDE GAS THROUGH THE CHARGE MATERIAL THEREIN TO SCRUB SAID HALIDE GAS AND PREHEAT THE CHARGE MATERIAL.
Claim 4
Dependent Claim
156 words
IN APPARATUS FOR SUBHALIDE REFINING OF ALUMINUM, IN COMBINATION, A REFINING SYSTEM COMPRISING A PREHEATER ARRANGED TO RECEIVE ALUMINUM-CONTAINING CHARGE MATERIAL AND HAVING GAS INLET AND OUTLET MEANS, A CONVERTER CONNECTED AND ARRANGED TO RECEIVE SAID CHARGE MATERIAL AFTER PREHEATING IN SAID PREHEATER AND HAVING GAS INLET AND OUTLET MEANS FOR PASSAGE OF HALIDE GAS TO REACT WITH ALUMINUM OF THE CHARGE MATERIAL AT HIGH TEMPERATURE, A DECOMPOSER HAVING GAS INLET AND OUTLET MEANS WITH SAID GAS INLET MEANS CONNECTED WITH THE GAS OUTLET OF THE CONVERTER AND ARRANGED TO RECEIVE REACTED GAS THEREFROM FOR DEPOSITING PURE ALUMINUM METAL AND DISCHARGING HALIDE GAS, THE GAS INLET MEANS OF SAID PREHEATER BEING CONNECTED WITH THE GAS OUTLET MEANS OF SAID DECOMPOSER TO RECEIVE AT LEAST A PORTION OF THE HALIDE GAS DISCHARGED THEREFROM, SAID PREHEATER BEING OPERABLE TO CIRCULATE SAID HALIDE GAS THROUGH THE CHARGE MATERIAL THEREIN TO SCRUB SAID HALIDE GAS AND PREHEAT THE CHARGE MATERIAL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |