Patent US4595466A successfully refreshed from Google Patents.
US4595466A
Expired / Lapsed
US
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Metal electrolysis using a low temperature bath
Assignee: Atlantic Richfield Co
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Filing: 1985-03-07
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Granted: 1986-06-17
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Expires: 2005-03-07
Abstract
Abstract A cell for the electrolytic deposition of metal at low temperatures and low electrical consumption in which an anode of a metal oxide and reducing agent immersed in an electrolytic molten halide salt bath comprises lithium chloride and sodium fluoride, the bath formulated to have high electrical conductivity and very low solubility for the metal oxide, as well as the recovered metal. The electrolytic molten halide salt bath is substantially absent of the metal to be recovered.
Inventors
- 👤 Jack Y. Josefowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:10
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/04; C25C3/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A method of producing a metal selected from a group consisting of aluminum and magnesium comprising the steps of: Providing an electrolyte cell including an electrolyte comprising from 85 to 90 percent by weight lithium chloride and 10 to 15 percent by weight sodium fluoride; and having a substantial absence of a salt of said metal; a cathode immersed in said electrolyte for electrolytic winning of said metal; and an anode comprising a mixture of an oxygen-containing compound of said metal and a reducing agent; and operating said cell to produce said metal deposited in a molten pool in said cell.
Claim 2
Independent Claim
101 words
A method of producing a metal selected from a group consisting of aluminum and magnesium comprising the steps of: Providing an electrolyte cell including an electrolyte comprising from 85 to 90 percent by weight lithium chloride and 10 to 15 percent by weight sodium fluoride; and having a substantial absence of a salt of said metal; a cathode immersed in said electrolyte for electrolytic winning of said metal; and an anode comprising a mixture of an oxygen-containing compound of said metal and a reducing agent; and operating said cell to produce said metal deposited in a molten pool in said cell.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the concentration of said metal in said electrolyte is less than about 0.5 weight percent of said electrolyte.
Claim 4
Dependent Claim
21 words
The method of claim 2 wherein the concentration of said metal is less than about 0.1 weight percent of said electrolyte.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said electrolyte comprises chloride salts of metals other than said metal.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said electrolyte comprises alkali metal and alkaline earth metal salts.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said electrolyte comprises about 86 weight percent lithium chloride and about 14 weight percent sodium fluoride.
Claim 8
Dependent Claim
29 words
The method of claim 1 wherein said anode comprises about 80 to 90 weight percent metal oxide of said metal and about 10 to 20 weight percent reducing agent.
Claim 9
Dependent Claim
29 words
The method of claim 7 wherein said metal oxide comprises about 85 weight percent of said anode and said reducing agent comprises about 15 weight percent of said anode.
Claim 10
Dependent Claim
11 words
The method of claim 8 wherein said reducing agent is carbon.
Claim 11
Dependent Claim
12 words
The method of claim 9 wherein said carbon is a conductive carbon.
Claim 12
Dependent Claim
19 words
The method of claim 1 wherein the conductivity of said electrolyte is greater than about 3.5 ohms/centimeter 2 .
References Cited (Backward Citations)
DE2805374A1
Cited
US4342637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |