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Patent US4410412A successfully refreshed from Google Patents.
US4410412A
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US
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Cathode for an electrolytic cell for producing aluminum via the fused salt electrolytic process
Assignee: SWISS ALUMINIUM Ltd A CORP OF SWITZERLAND
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Filing: 1981-11-02
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Granted: 1983-10-18
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Expires: 2001-11-02
Abstract
Abstract An exchangeable, wettable solid cathode for a fused salt electrolytic cell for the production of aluminum is made out of at least one aluminide of the groups IV A, V A or VI A of the periodic system of elements. A titanium aluminide of the gamma -phase has been shown to be particularly favorable for this purpose.
Inventors
- 👤 Tibor Kugler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:37
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
An exchangeable, wettable, consumable solid cathode for use in a fused salt electrolytic cell for producing aluminum, wherein said cathode is made substantially entirely of an aluminide of at least one metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten and mixtures thereof without a binder of metallic aluminum such that the melting point of said consumable solid cathode is greater than the operating temperature of the electrolytic cell during aluminum production.
Claim 2
Dependent Claim
79 words
An exchangeable, wettable, consumable solid cathode for use in a fused salt electrolytic cell for producing aluminum, wherein said cathode is made substantially entirely of an aluminide of at least one metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten and mixtures thereof without a binder of metallic aluminum such that the melting point of said consumable solid cathode is greater than the operating temperature of the electrolytic cell during aluminum production.
Claim 3
Dependent Claim
23 words
A cathode according to claim 1 wherein said cathode is made of γ-phase titanium aluminide which lies between TiAl and TiAl 3 .
Claim 4
Dependent Claim
22 words
A cathode according to claim 1 wherein the component which is not aluminum is alloyed with the aluminides in a hyperstoichiometric ratio.
Claim 5
Dependent Claim
27 words
A cathode according to claim 1 wherein the cathode comprises individually exchangeable elements which have approximately the same horizontal dimensions as the working surface of the anode.
Claim 6
Dependent Claim
20 words
A cathode according to claim 1 wherein a plurality of elements are grouped together in holders to form the cathode.
Claim 7
Dependent Claim
29 words
A cathode according to claim 5 wherein holders are provided for said plurality of elements, said holders being made of an insulating material which is resistant to molten aluminum.
Claim 8
Dependent Claim
17 words
A cathode according to claim 5 wherein said plurality of elements are vertically arranged plates or rods.
Claim 9
Dependent Claim
28 words
A cathode according to claim 6 wherein said plurality of elements are mechanically and rigidly attached to said holders wherein said holders are situated fully in liquid aluminum.
Claim 10
Dependent Claim
20 words
A cathode according to claim 1 wherein the working surface of the cathode is parallel to that of the anode.
Claim 11
Dependent Claim
25 words
A cathode according to claim 1 wherein the cathode comprises aluminide balls and/or granules poured into the cell below the working surface of the anodes.
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) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |