Patent US2696420A successfully refreshed from Google Patents.
US4478693A
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Inert electrode compositions
Assignee: Alcoa Corp
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Filing: 1983-01-20
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Granted: 1984-10-23
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Expires: 2003-01-20
Abstract
Abstract An inert type electrode composition suitable for use in the electrolytic production of metals such as aluminum is disclosed. The aluminum is produced from an aluminum-containing material dissolved in a molten salt. The electrode composition is fabricated from at least two metals or metal compounds combined to provide a combination metal compound containing at least one of the group consisting of oxide, fluoride, nitride, sulfide, carbide or boride, the combination metal compound defined by the formula: ##EQU1## Z is a number in the range of 1.0 to 2.2; K is a number in the range of 2.0 to 4.4; M i is at least one metal having a valence of 1, 2, 3, 4 or 5 and is the same metal or metals when M i is used in the composition; M j is a metal having a valence of 2, 3 or 4; X r is at least one of the elements from the group consisting of O, F, N, S, C and B; m, p and n are the number components which comprise M i , M j and X r ; F M .sbsb.i, F' M .sbsb.j, F' M .sbsb.i or F x .sbsb.r are the mole fractions of M i , M j and X r and 0<ΣF' M .sbsb.i <1.
Inventors
- 👤 Siba P. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:19
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C7/00; C25C7/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
234 words
A method of electrolytically producing metal from a metal compound selected from the group consisting of metal oxide and metal salt dissolved in a molten bath, the method comprising the steps of: (a) providing an electrolytic cell containing a molten electrolyte salt for dissolving a metal compound therein; (b) providing at least one electrode therein formulated from a combination metal compound defined by the formula: ##EQU4## Z is a number in the range of 1.0 to 2.2; K is a number in the range of 2.0 to 4.4; M i is a metal having a valence of 1, 2, 3, 4 or 5 and is the same metal or metals wherever M i is used in the formula; M j is a metal having a valence of 2, 3 or 4, M i and M j being different metals; X r is at least one of the elements from the group consisting of O, F, N, S, C and B; m, p and n are the number of components which comprise M i , M j and X r ; F M .sbsb.i, F' M .sbsb.j, F' M .sbsb.i or F X .sbsb.r are the mole fractions of M i , M j and X r , and 0<ΣF' M .sbsb.i <1 when m>1; and (c) passing electrolytic current through the cell thereby forming metal from said metal compound dissolved in said molten bath.
Claim 2
Independent Claim
234 words
A method of electrolytically producing metal from a metal compound selected from the group consisting of metal oxide and metal salt dissolved in a molten bath, the method comprising the steps of: (a) providing an electrolytic cell containing a molten electrolyte salt for dissolving a metal compound therein; (b) providing at least one electrode therein formulated from a combination metal compound defined by the formula: ##EQU4## Z is a number in the range of 1.0 to 2.2; K is a number in the range of 2.0 to 4.4; M i is a metal having a valence of 1, 2, 3, 4 or 5 and is the same metal or metals wherever M i is used in the formula; M j is a metal having a valence of 2, 3 or 4, M i and M j being different metals; X r is at least one of the elements from the group consisting of O, F, N, S, C and B; m, p and n are the number of components which comprise M i , M j and X r ; F M .sbsb.i, F' M .sbsb.j, F' M .sbsb.i or F X .sbsb.r are the mole fractions of M i , M j and X r , and 0<ΣF' M .sbsb.i <1 when m>1; and (c) passing electrolytic current through the cell thereby forming metal from said metal compound dissolved in said molten bath.
Claim 3
Dependent Claim
39 words
The method in accordance with claim 1 wherein M i has a valence selected from the group consisting of 1, 2, 4 or 5 and M j has a valence selected from the group consisting of 2 and 3.
Claim 4
Dependent Claim
12 words
The method in accordance with claim 1 wherein X r is oxygen.
Claim 5
Dependent Claim
31 words
The method in accordance with claim 1 wherein M i is at least one metal selected from the group consisting of Ni, Li, Zn, Co, Mn, Nb, Ta, Fe and Hf.
Claim 6
Dependent Claim
32 words
The method in accordance with claim 1 wherein M j is at least one metal selected from the group consisting of Fe, V, Cr, Mn, Al, Zn, Co, Ni, Hf, and Y.
Claim 7
Dependent Claim
46 words
The method in accordance with claim 1 wherein M i is at least one metal selected from the group consisting of Ni, Zn, Co, Li and Fe and wherein M j is at least one metal selected from the group consisting of Fe, Cr and Y.
Claim 8
Dependent Claim
29 words
The method in accordance with claim 1 wherein the metal oxide and metal salt are aluminum oxide and aluminum salt and the metal produced in step (c) is aluminum.
Claim 9
Dependent Claim
19 words
The method in accordance with claim 7 wherein the aluminum produced has a purity of at least 99.0 wt.%.
Claim 10
Independent Claim
245 words
A method of electrolytically producing metal from a metal compound selected from the group consisting of metal oxide and metal salt dissolved in a molten bath, the method comprising the steps of: (a) providing an electrolytic cell containing a molten electrolyte salt for dissolving a metal compound therein; (b) providing at least one electrode therein formulated from a combination metal compound defined by the formula: ##EQU5## Z is a number in the range of 1.0 to 2.2; K is a number in the range of 2.0 to 4.4; M i is at least one metal selected from the group consisting of Ni, Li, Zn, Co, Mn, Nb, Ta, Fe and Hf and is the same metal or metals wherever M i is used in the formula; and M j is at least one metal selected from the group consisting of Fe, V, Cr, Mn, Al, Zn, Co, Ni, Hf and Y; X r is at least one of the elements from the group consisting of O, F, N, S, C and B; m, p and n are the number of components that comprise M i , M j and X r ; F M .sbsb.i, F' M .sbsb.j, F' M .sbsb.i or F X .sbsb.r are the mole fractions of M i , M j and X r , and 0<ΣF' M .sbsb.i <1 when m>1; and (c) passing electrolytic current through the cell thereby forming aluminum having a purity of at least 99.0 wt.%.
Claim 11
Independent Claim
245 words
A method of electrolytically producing metal from a metal compound selected from the group consisting of metal oxide and metal salt dissolved in a molten bath, the method comprising the steps of: (a) providing an electrolytic cell containing a molten electrolyte salt for dissolving a metal compound therein; (b) providing at least one electrode therein formulated from a combination metal compound defined by the formula: ##EQU5## Z is a number in the range of 1.0 to 2.2; K is a number in the range of 2.0 to 4.4; M i is at least one metal selected from the group consisting of Ni, Li, Zn, Co, Mn, Nb, Ta, Fe and Hf and is the same metal or metals wherever M i is used in the formula; and M j is at least one metal selected from the group consisting of Fe, V, Cr, Mn, Al, Zn, Co, Ni, Hf and Y; X r is at least one of the elements from the group consisting of O, F, N, S, C and B; m, p and n are the number of components that comprise M i , M j and X r ; F M .sbsb.i, F' M .sbsb.j, F' M .sbsb.i or F X .sbsb.r are the mole fractions of M i , M j and X r , and 0<ΣF' M .sbsb.i <1 when m>1; and (c) passing electrolytic current through the cell thereby forming aluminum having a purity of at least 99.0 wt.%.
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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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |