Patent EP0052468A1 successfully refreshed from Google Patents.
EP0052468A1
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Anode for molten salt electrolysis, method for the preparation thereof and electrolytic process using it
Assignee: Dow Chemical Co
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Filing: 1981-11-06
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Granted: —
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Expires: 2001-11-06
Abstract
Abstract n uncoated ceramic anode comprising titanium having a formal valence of +4; titanium having a formal valence of +3; and a dopant which prevents at least a portion of the titanium +3 from converting to titanium +4 when the ceramic anode is at operating cell conditions. The ceramic anode may have an electrically conductive substance enclosed in its interior. The substance serves to transfer electrical energy from a power source to the ceramic member. These anodes are particularly useful when used in molten salt electrolytic cells because they give good electrolytic production rates while demonstrating exceptionally low wear rates.
Inventors
- 👤 Stanley Frederick Spangenberg
- 👤 Arlington Levart Finley
- 👤 Delbert James Searson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:56
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02; C25C7/025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
An anode for the electrolysis of molten salts comprising an electrically conductive substance at least partially surrounded by an uncoated, sintered, ceramic member which comprises titanium ions having a formal valence of +3; titanium ions having a formal valence of +4; and dopant ions which prevent at least a portion of the titanium ions having a formal valence of +3 from converting to titanium ions having a formal valence of +4 when the ceramic member is at the operating temperatures of a molten salt electrolytic cell.
Claim 2
Dependent Claim
86 words
An anode for the electrolysis of molten salts comprising an electrically conductive substance at least partially surrounded by an uncoated, sintered, ceramic member which comprises titanium ions having a formal valence of +3; titanium ions having a formal valence of +4; and dopant ions which prevent at least a portion of the titanium ions having a formal valence of +3 from converting to titanium ions having a formal valence of +4 when the ceramic member is at the operating temperatures of a molten salt electrolytic cell.
Claim 3
Dependent Claim
21 words
An anode as claimed in Claim 1 wherein the dopant ions are ions having a valence of +5 or a valence
Claim 4
Dependent Claim
22 words
An anode as claimed in Claim 2 wherein the dopant ions are materials containing niobium, tantalum or fluoride ions, or mixtures thereof.
Claim 5
Dependent Claim
27 words
An anode as claimed in any one of the preceding claims the electrically conductive substance is a solid metal member, or a molten metal or metal alloy.
Claim 6
Dependent Claim
44 words
5 . An anode as claimed in any one of.the preceding claims which in the conductive material is a material which is essentially non-reactive with the ceramic member to the extent that the electrical : properties of the ceramic member are not adversely affected.
Claim 7
Dependent Claim
24 words
An anode as claimed in Claim 5, wherein the electrically conductive substance is Cr,Cu,Zn,Ag, Cd,In,Sn,Pb,W,Pt,Pb or Bi, or alloys of two or more thereof.
Claim 8
Dependent Claim
38 words
An electrolytic cell comprising an anode as claimed in any one of Claims 1 to 6 a cathode, means to impose an electrical potential on the anode and the. cathode, and means to remove the products of electrolysis.
Claim 9
Independent Claim
99 words
A method of preparing a ceramic member suitable for use as an electrode comprising: mixing a titanium compound with one or more dopants which are materials containing tantalum ions, niobium ions or fluoride ions; heating the mixture for a time and at a temperature sufficient to form a single-phase of the titanium compound and the dopant as determined by X-ray diffraction; compacting the single phase material around an electrically conductive element adapted to transmit electrical energy from a power source to the solid. solution; and heating the compacted material for a time and at a temperature.sufficient to cause sintering.
Claim 10
Independent Claim
99 words
A method of preparing a ceramic member suitable for use as an electrode comprising: mixing a titanium compound with one or more dopants which are materials containing tantalum ions, niobium ions or fluoride ions; heating the mixture for a time and at a temperature sufficient to form a single-phase of the titanium compound and the dopant as determined by X-ray diffraction; compacting the single phase material around an electrically conductive element adapted to transmit electrical energy from a power source to the solid. solution; and heating the compacted material for a time and at a temperature.sufficient to cause sintering.
Claim 11
Independent Claim
89 words
A method of preparing a ceramic member suitable for use as an electrode comprising: mixing a titanium compound with one or more dopants which are materials containing tantalum ions, niobium ions or fluoride ions; heating the mixture for a time and at a temperature sufficient to form a single-phase solid solution as determined by X-ray diffraction; compacting the solid solution into the shape of container having a hollow interior adapted to contain a liquid; and heating the container at a temperature and for a time sufficient to cause sintering.
Claim 12
Independent Claim
89 words
A method of preparing a ceramic member suitable for use as an electrode comprising: mixing a titanium compound with one or more dopants which are materials containing tantalum ions, niobium ions or fluoride ions; heating the mixture for a time and at a temperature sufficient to form a single-phase solid solution as determined by X-ray diffraction; compacting the solid solution into the shape of container having a hollow interior adapted to contain a liquid; and heating the container at a temperature and for a time sufficient to cause sintering.
Claim 13
Dependent Claim
56 words
An electrolytic process comprises imposing an electrical potential onto an anode and a cathode in an electrolytic cell containing a molten salt bath, said potential being sufficient to cause electrolysis of the molten salt electrolyte; and removing the products of electrolysis, the anode being an anode as claimed in any one of claims 1 to 6.
References Cited (Backward Citations)
US4160069A
Cited
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