US3755099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light metal production
Assignee: Alcoa Corp
•
Filing: 1971-09-08
•
Granted: 1973-08-28
•
Expires: 1991-09-08
Abstract
Abstract Aluminum or magnesium is produced electrolytically from the light metal chloride dissolved in molten halide of higher decomposition potential, in a cell which includes at least two opposed electrodes providing at least one inter-electrode space therebetween, while maintaining an effective anode-cathode distance less than 3/4 inch.
Inventors
- 👤 W Haupin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:34
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/18; C25C3/22; C25C7/00; C25C7/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
24 words
The process of claim 1 wherein the effective anode-cathode distance in at least one such inter-electrode space is maintained at less than 1/2 inch.
Claim 2
Dependent Claim
22 words
The process of claim 1 wherein the molten bath is maintained at a temperature above the solidus of the light metal produced.
Claim 3
Dependent Claim
114 words
A process for producing aluminum in a cell which includes at least two opposed electrodes providing at least one inter-electrode space therebetween, at least one of which has a carbonaceous cathode surface, which process comprises maintaining a flow of bath composed essentially of aluminum chloride dissolved in alkali metal-containing molten halide of higher decomposition potential through each inter-electrode space, while electrolyzing such bath, thus producing aluminum and anode product, maintaining an effective anode-cathode distance in at least one such inter-electrode space that is less than 3/4 inch, thus causing anode product therein to contact the effective cathode surface and thereby both flux the aluminum and inhibit alkali metal reaction with the carbonaceous cathode surface.
Claim 4
Dependent Claim
29 words
The process of claim 4 wherein the aluminum chloride content of the bath supplied to each inter-electrode space is maintained between about 1 1/2 and 10 percent by weight.
Claim 5
Dependent Claim
114 words
A process for producing magnesium in a cell which includes at least two opposed electrodes providing at least one inter-electrode space therebetween, at least one of which has a carbonaceous cathode surface, which process comprises maintaining a flow of bath composed essentially of magnesium chloride dissolved in alkali metal-containing molten halide of higher decomposition potential through each inter-electrode space, while electrolyzing such bath, thus producing magnesium and anode product, maintaining an effective anode-cathode distance in at least one such inter-electrode space that is less than 3/4 inch, thus causing anode product therein to contact the effective cathode surface and thereby both flux the magnesium and inhibit alkali metal reaction with the carbonaceous cathode surface.
Claim 6
Dependent Claim
29 words
The process of claim 6 wherein the magnesium chloride content of the bath supplied to each inter-electrode space is maintained between about 1 1/2 and 20 percent by weight.
Claim 7
Dependent Claim
104 words
A process for producing aluminum in a cell which includes an anode, at least one intermediate bipolar electrode and a cathode in superimposed, spaced relationship defining inter-electrode spaces therebetween, at least one of which has a carbonaceous cathode surface, which process comprises maintaining a flow of bath composed essentially of aluminum chloride dissolved in molten halide of higher decomposition potential through each inter-electrode space, while electrolyzing such bath, thus producing aluminUm and anode product, and maintaining an effective anode-cathode distance in at least one such inter-electrode space that is less than 3/4 inch, thus causing anode product therein to contact the effective cathode surface.
Claim 8
Dependent Claim
29 words
The process of claim 8 wherein the aluminum chloride content of the bath supplied to each inter-electrode space is maintained between about 1 1/2 and 10 percent by weight.
Claim 9
Dependent Claim
103 words
A process for producing magnesium in a cell which includes at least two opposed electrodes providing at least one inter-electrode space therebetween, at least one of which has a carbonaceous cathode surface, which process comprises maintaining a flow of bath composed essentially of magnesium chloride dissolved in alkali metal-containing molten halide of higher decomposition potential through each inter-electrode space, while electrolyzing such bath, thus producing magnesium and anode product, maintaining an effective anode-cathode distance in at least one such inter-electrode space that is less than 3/4 inch, thus causing anode product therein to contact the effective cathode surface and thereby flux the magnesium.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |