US4336282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of electrode for use in electrolysis
Assignee: De Nora Permelec Ltd
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Filing: 1981-02-05
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Granted: 1982-06-22
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Expires: 2001-02-05
Abstract
Abstract An electrode for use in the electrolysis of an aqueous solution of a metal halide, the electrode comprising an electrically conductive substrate and, formed thereon, a coating comprising (1) 50 to 95 mole % of platinum and (2)(a) 5 to 50 mole % of tin oxide, or (b) 5 to 50 mole % of tin oxide and cobalt oxide, wherein the tin oxide is present in an amount of at least 5 mole % and the cobalt oxide is present in an amount up to 20 mole %; and a process for producing the above-described electrode.
Inventors
- 👤 Hideo Sato
- 👤 Takayuki Shimamune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:27
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A process for producing an electrode for use in the electrolysis of an aqueous solution of a metal halide, which comprises: coating a solution containing a platinum compound and a tin compound, and optionally a cobalt compound, on an electrically conductive substrate, and heat-treating the coated substrate in an oxidizing atmosphere thereby to form a coating on the substrate comprising: (1) 50 to 95 mole % of platinum, (2)(a) 5 to 50 mole % of tin oxide, or (b) 5 to 50 mole % of tin oxide and cobalt oxide, wherein the tin oxide is present in an amount of at least 5 mole % and the cobalt oxide is present in an amount up to 20 mole %, the total of (1) and (2) being 100 mole %.
Claim 2
Dependent Claim
129 words
A process for producing an electrode for use in the electrolysis of an aqueous solution of a metal halide, which comprises: coating a solution containing a platinum compound and a tin compound, and optionally a cobalt compound, on an electrically conductive substrate, and heat-treating the coated substrate in an oxidizing atmosphere thereby to form a coating on the substrate comprising: (1) 50 to 95 mole % of platinum, (2)(a) 5 to 50 mole % of tin oxide, or (b) 5 to 50 mole % of tin oxide and cobalt oxide, wherein the tin oxide is present in an amount of at least 5 mole % and the cobalt oxide is present in an amount up to 20 mole %, the total of (1) and (2) being 100 mole %.
Claim 3
Dependent Claim
44 words
The process of claim 1, wherein the coating solution contains 10 to 90 mole % of the platinum compound as platinum, 10 to 90 mole % of the tin compound as tin, and up to 20 mole % of the cobalt compound as cobalt.
Claim 4
Dependent Claim
19 words
The process of claim 1 or 2, wherein the tin compound in the coating solution is a tin chloride.
References Cited (Backward Citations)
US3632498A
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US3778307A
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US3684543A
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Cited
US3951766A
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US4061558A
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |