US4265728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and electrode with manganese dioxide coating
Assignee: ELECTRODE Corp A CORP OF
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Filing: 1978-11-03
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Granted: 1981-05-05
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Expires: 1998-11-03
Abstract
Abstract Disclosed is an electrode for use in electrochemical processes wherein a metal substrate made of a valve metal mesh such as titanium carries a semiconductive intermediate coating consisting of tin and antimony oxides laid down upon the valve metal mesh in a series of layers and an electrocatalytically active top coating of an oxide of manganese, applied in a series of layers or by electroplating and subsequently baked in an oxidizing atmosphere at a temperature in the range of 380 DEG to 420 DEG C.
Inventors
- 👤 Mary R. Suchanski
- 👤 Jeries I. Bishara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:42
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
A method for manufacture of an electrode for use in an electrolytic cell comprising the steps of: selecting a valve metal substrate from the group consisting of aluminum, molybdenum, niobium, tantalum, titanium, tungsten, zirconium or alloys thereof; applying to at least a portion of the surface area of the valve metal substrate a semi-conductive intermediate coating of thermally decomposable compounds of tin and antimony containing 0.1 to 30 weight percent antimony, drying the semi-conductive intermediate coating; baking the semi-conductive intermediate coating in an oxidizing atmosphere at an elevated temperature to transform the tin and antimony compounds to their respective oxides; and applying to the surface of the semi-conductive intermediate coating a coating of thermally decomposable compounds of manganese, drying the top coating and baking the top coating in an oxidizing atmosphere at a temperature in the range of 380° to 420° C. to its oxide form.
Claim 2
Independent Claim
146 words
A method for manufacture of an electrode for use in an electrolytic cell comprising the steps of: selecting a valve metal substrate from the group consisting of aluminum, molybdenum, niobium, tantalum, titanium, tungsten, zirconium or alloys thereof; applying to at least a portion of the surface area of the valve metal substrate a semi-conductive intermediate coating of thermally decomposable compounds of tin and antimony containing 0.1 to 30 weight percent antimony, drying the semi-conductive intermediate coating; baking the semi-conductive intermediate coating in an oxidizing atmosphere at an elevated temperature to transform the tin and antimony compounds to their respective oxides; and applying to the surface of the semi-conductive intermediate coating a coating of thermally decomposable compounds of manganese, drying the top coating and baking the top coating in an oxidizing atmosphere at a temperature in the range of 380° to 420° C. to its oxide form.
Claim 3
Dependent Claim
39 words
A method according to claim 1 wherein said semiconductive intermediate coating is applied in a series of layers, each being dried before subsequent application of the next layer, and being baked at the conclusion thereof to their respective oxides.
Claim 4
Dependent Claim
11 words
A method according to claim 1 wherein titanium mesh is selected.
Claim 5
Independent Claim
148 words
A method for manufacture of an electrode for use in an electrolytic cell comprising the steps of: selecting a valve metal substrating from the group consisting of aluminum, molybdenum, niobium, tantalum, titanium, tungsten, zirconium, or alloys thereof; applying to at least a portion of the surface area of the valve metal substrate a semi-conductive intermediate coating of thermally decomposable compounds of tin and antimony containing 0.1 to 30 weight per antimony, drying the semi-conductive intermediate coating; baking the semi-conductive intermediate coating in an oxidizing atmosphere at an elevated temperature to transform the tin and antimony compounds to their respective oxides; and electroplating onto the surface of the semi-conductive intermediate coating a top coating of an oxide of manganese; and baking the top coating in an oxidizing atmosphere at a temperature in the range of 380° to 420° C. to convert the manganese oxide to the beta form oxide.
Claim 6
Independent Claim
148 words
A method for manufacture of an electrode for use in an electrolytic cell comprising the steps of: selecting a valve metal substrating from the group consisting of aluminum, molybdenum, niobium, tantalum, titanium, tungsten, zirconium, or alloys thereof; applying to at least a portion of the surface area of the valve metal substrate a semi-conductive intermediate coating of thermally decomposable compounds of tin and antimony containing 0.1 to 30 weight per antimony, drying the semi-conductive intermediate coating; baking the semi-conductive intermediate coating in an oxidizing atmosphere at an elevated temperature to transform the tin and antimony compounds to their respective oxides; and electroplating onto the surface of the semi-conductive intermediate coating a top coating of an oxide of manganese; and baking the top coating in an oxidizing atmosphere at a temperature in the range of 380° to 420° C. to convert the manganese oxide to the beta form oxide.
Claim 7
Dependent Claim
22 words
A method according to claim 4 wherein the top coating attains a weight gain in excess of 300 grams per square meter.
Claim 8
Dependent Claim
18 words
A method according to claim 5 wherein the top coating is applied from a bath of manganese nitrate.
Claim 9
Dependent Claim
49 words
A method according to claim 6 wherein the electroplating bath is maintained in the temperature range of 95° to 100° C. and the electrical current density is maintained in the range of 1 to 3 mA/cm 2 for a time period in the range of 20 to 40 hours.
Claim 10
Dependent Claim
24 words
A method according to claim 7 wherein the weight gain of MnO 2 is in the range of 300 to 500 grams/m 2 .
Claim 11
Dependent Claim
20 words
A method according to claim 8 wherein the top coating is baked for a time period up to 24 hours.
Claim 12
Dependent Claim
114 words
An electrode for use in an electrolytic cell comprising: a solid titanium substrate; on at least a portion of the surface of said substrate, a semiconductive intermediate coating consisting of oxides of tin and antimony containing 0.1 to 30 weight percent antimony, in an amount greater than 2 grams per square meter of said substrate surface area; and on the surface of said semiconductive intermediate coating, an electrocatalytically active top coating consisting of an oxide of manganese electroplated thereon and converted to beta MnO 2 structure by baking in an oxidizing atmosphere having a temperature in the range of 380° to 420° C. to attain an amount greater than 300 grams per square meter.
Claim 13
Dependent Claim
114 words
An electrode for use in an electrolytic cell comprising: a solid titanium substrate; on at least a portion of the surface of said substrate, a semiconductive intermediate coating consisting of oxides of tin and antimony containing 0.1 to 30 weight percent antimony, in an amount greater than 2 grams per square meter of said substrate surface area; and on the surface of said semiconductive intermediate coating, an electrocatalytically active top coating consisting of an oxide of manganese electroplated thereon and converted to beta MnO 2 structure by baking in an oxidizing atmosphere having a temperature in the range of 380° to 420° C. to attain an amount greater than 300 grams per square meter.
References Cited (Backward Citations)
DE52481C
Cited
US3535217A
Cited
US3616302A
Cited
US3627669A
Cited
US3775284A
Cited
US4051000A
Cited
US4060476A
Cited
US4072586A
Cited
US4028215A
Cited
US4048027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |