US4294628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of cathode for use in electrolysis
Assignee: ThyssenKrupp Nucera Japan Ltd
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Filing: 1980-06-17
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Granted: 1981-10-13
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Expires: 2000-06-17
Abstract
Abstract A cathode for use in electrolysis comprising (1) a substrate of iron or an alloy thereof; (2) a compact interlayer of Fe 3 O 4 formed on the substrate, and (3) a coating of activating nickel comprising principally nickel or an alloy thereof formed on the Fe 3 O 4 layer. In another embodiment, the interlayer (2) may be heat-treated to convert a part of the interlayer (2) into a nickel ferrite. The cathode is especially suitable for use in the electrolysis of an alkali metal halide, such as sodium chloride, using an ion exchange membrane method.
Inventors
- 👤 Kazuki Kasuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:59
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A method for producing a cathode for use in electrolysis which comprises: (a) forming a compact layer of Fe 3 O 4 on a substrate of iron or an alloy of iron; and (b) coating activating nickel comprising mainly nickel or an alloy of nickel on the Fe 3 O 4 layer.
Claim 2
Independent Claim
52 words
A method for producing a cathode for use in electrolysis which comprises: (a) forming a compact layer of Fe 3 O 4 on a substrate of iron or an alloy of iron; and (b) coating activating nickel comprising mainly nickel or an alloy of nickel on the Fe 3 O 4 layer.
Claim 3
Dependent Claim
28 words
The method of claim 1, wherein the method additionally includes heat-treating the cathode to convert at least a part of the Fe 3 O 4 into nickel ferrite.
Claim 4
Independent Claim
83 words
A method for producing a cathode for use in electrolysis which comprises: (a) forming a compact layer of Fe 3 O 4 on a substrate of iron or an alloy of iron; (b) coating nickel or an alloy of nickel on the Fe 3 O 4 layer, (c) heat-treating the product to convert at least a part of the nickel coating into nickel ferrite; and (d) then coating activating nickel comprising principally nickel or an alloy of nickel on the heat-treated nickel coating.
Claim 5
Independent Claim
83 words
A method for producing a cathode for use in electrolysis which comprises: (a) forming a compact layer of Fe 3 O 4 on a substrate of iron or an alloy of iron; (b) coating nickel or an alloy of nickel on the Fe 3 O 4 layer, (c) heat-treating the product to convert at least a part of the nickel coating into nickel ferrite; and (d) then coating activating nickel comprising principally nickel or an alloy of nickel on the heat-treated nickel coating.
Claim 6
Dependent Claim
33 words
The method of claim 1, 2 or 3, wherein the method includes forming the compact layer of Fe 3 O 4 on the surface of the substrate by heating the substrate in steam.
References Cited (Backward Citations)
US1302959A
Cited
US2305539A
Cited
US2727842A
Cited
US3216919A
Cited
US4169028A
Cited
JPS5163496A
Cited
US4039417A
Cited
US4024044A
Cited
US4116804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |