|
Match
|
Document |
Document Title |
|
|
7258778 |
Electrocatalytic coating with lower platinum group metals and electrode made therefrom
The present invention relates to an electrocatalytic coating and an electrode having the coating thereon, wherein the coating is a mixed metal oxide coating, preferably platinum group metal oxides,...
|
|
|
6395153 |
Diaphragm cell
The present invention pertains to electrolytic diaphragm cells, particularly for the electrolysis of brine to produce chlorine and caustic. The innovation resides generally in the discovery that...
|
|
|
6156185 |
Reactivation of deactivated anodes
Disclosed is a method of reactivating a deactivated anode that has a coating of a noble metal or noble metal oxide on a substrate. A coating of a noble metal is deposited on the anode...
|
|
|
6132591 |
Method for removal of sulfate groups and chlorate groups from brine
In removal of sulfate groups and chlorate groups from brine used for electrolysis, concentrated brine used in an electrolysis process or dilute brine whose concentration is decreased by...
|
|
|
5993620 |
Anode for diaphragm electrochemical cell
The invention discloses a novel structure for an expandable anode to be used in diaphragm cells. This new structure comprises a conductor bar in the form of a copper core provided with a titanium...
|
|
|
5650058 |
Electrolytic cell and capillary gap electrode for gas-developing or gas-consuming electrolytic reactions and electrolysis process therefor
The invention includes an electrolytic cell for gas-developing or gas-consuming electrolytic reactions and processes, and an electrolysis process therefor. According to the invention, the capillary...
|
|
|
5593553 |
Electrolytic cell and electrode therefor
An electrode comprising a first plate (4) having an active electrode surface and a second plate (14) facing and spaced from the first plate, and at least one barrier plate (13) positioned between...
|
|
|
5565082 |
Brine electrolysis and electrolytic cell therefor
A method for brine electrolysis using a gas electrode and an electrolytic cell therefor, in which gas electrode 31 permeable to gas and liquid is arranged in cathode chamber 24 in contact with...
|
|
|
5366598 |
Method of using a metal substrate of improved surface morphology
A metal surface is now described having enhanced adhesion of subsequently applied coatings. The substrate metal of the article, such as a valve metal as represented by titanium, is provided with a...
|
|
|
5230780 |
Electrolyzing halogen-containing solution in a membrane cell
A coating is now disclosed which is especially serviceable as an improved electrocatalytic coating for an electrode. The coating is a crystalline coating of mixed oxides. The oxides are of iridium,...
|
|
|
5227030 |
Electrocatalytic cathodes and methods of preparation
Cathodes useful in an electrolytic cell, such as a chlor-alkali cell, are disclosed which have a metallic-surfaced substrate coated with a catalytic coating composition. In one aspect, the...
|
|
|
5133842 |
Electrochemical cell having electrode comprising gold containing electrocatalyst
The disclosed electrocatalyst material is useful in electrodes, especially in cathodes for the reduction of oxygen or peroxide to water or hydroxide. The electrocatalyst typically comprises 0.1 to...
|
|
|
5035779 |
Process for producing cathode and process for electrolysis using said cathode
A cathode for electrolysis, particularly of a sodium chloride aqueous solution by an ion-exchange membrane method, and a process for producing the same, the cathode comprising a conductive base...
|
|
|
4975161 |
Electrodes for use in electrochemical processes and method for preparing the same
The present invention concerns electrodes for use in electrochemical processes, particularly as cathodes for hydrogen evolution in cells for the electrolysis of alkali metal halides, the electrodes...
|
|
|
4938851 |
Method for preparing an electrode and use thereof in electrochemical processes
The present invention concerns a method for preparing electrodes for use in electrochemical processes, said electrodes being constituted by a conductive support whereto an electrocatalytic coating...
|
|
|
4801368 |
Ni/Sn cathode having reduced hydrogen overvoltage
Disclosed is a cathode comprising an active layer composed of a nickel/tin alloy having a nickel content of 25 to 99% by weight, which is formed on the surface of an electrically conductive...
|
|
|
4668370 |
Electrode for electrochemical processes and use thereof in electrolysis cells
The present invention provides an electrode having a coating made of electrocatalytic ceramic materials on substantially incompatible metal substrates, by resorting to the use of an anchoring...
|
|
|
4588483 |
High current density cell
A filter press membrane electrolytic cell having at least one cathode and one anode sandwiched about a permselective ion exchange membrane which employs a cathode having a first layer and a second...
|
|
|
4574037 |
Vertical type electrolytic cell and electrolytic process using the same
Disclosed is a vertical type electrolytic cell partitioned by an ion exchange membrane into an anode compartment and a cathode compartment, the cathode compartment being divided by a non-perforated...
|
|
|
4572770 |
Preparation and use of electrodes in the electrolysis of alkali halides
A substrate is coated with a solution of metal oxide precursor compounds and an etchant for etching the substrate, the metal oxide precursor compounds are thermally concentrated by removing...
|
|
|
4512857 |
Prevention of corrosion of electrolyte cell components
Disclosed is a method of operating an electrolytic cell having an active, catalytic cathode and an iron structure in contact with an alkaline electrolyte. The dissolution of iron into the...
|
|
|
4507183 |
Ruthenium coated electrodes
An electrode produced by electroplating ruthenium metal on a substrate from a nonacidic ruthenium-containing electroplating solution.
|
|
|
4470890 |
Method for preventing cathode corrosion
A method is provided for preventing the dissolution of transition metal-based cathodes used in chlor-alkali diaphragm cells by adding a small amount of a corrosion inhibitor, such as sodium...
|
|
|
4436599 |
Method for making a cathode, and method for lowering hydrogen overvoltage in a chloralkali cell
The invention provides an improved process for making an iron-activated cathode for a chloralkali cell, and an improved method for lowering the operating voltage of a chloralkali electrolysis cell,...
|
|
|
4430177 |
Electrolytic process using oxygen-depolarized cathodes
A porous, two layer electrode which may be used as an anode or a cathode and a cell using one or more of the electrodes. The electrode is in a pocket shaped configuration with the inner layer...
|
|
|
4392927 |
Novel electrode
A composite electrode comprising an electroconductive base with an electrolyte inert, electroconductive electrocatalytic layer applied by thermal spraying, the said layer being a powder of a matrix...
|
|
|
4358353 |
Method for extending cathode life
A method is provided for extending the life of transition metal-based cathodes used in chlor-alkali diaphragm cells by adding a small amount of a reducing agent, such as Na 2 SO 3 or urea, to the...
|
|
|
4356068 |
Permionic membrane
Disclosed is an electrolytic cell having an anode and cathode separated by and in contact with a permionic membrane. The cathodic surface of the permionic membrane is characterized by microporous...
|
|
|
4350608 |
Oxygen cathode for alkali-halide electrolysis and method of making same
An air/oxygen electrode substrate for use as a cathode in alkali metal halide electrolysis processes is formed by compressing a prefused mixture of carbon black and a hydrophobic polymer such as...
|
|
|
4342629 |
Solid polymer electrolyte chlor-alkali process
Disclosed is a solid polymer electrolyte electrolytic cell, e.g., for chlorine production, where the electrodes are in compressive contact with and removable from the permionic membrane.
|
|
|
4318795 |
Valve metal electrode with valve metal oxide semi-conductor face and methods of carrying out electrolysis reactions
Describes chlorine resistant metal electrodes, preferably of valve metals such as titanium and tantalum, having coatings of mixed metal oxides, preferably valve metal oxides and platinum group...
|
|
|
4312723 |
Corrosion resistant electrolytic cell
An electrolytic cell and its method of operation is described. The cell comprises an anode, a cathode and iron-containing metals exposed to the interior portions of the cell which are maintained at...
|
|
|
4279709 |
Preparation of porous electrodes
Electrodes with porous coatings are produced using an inorganic compound which is soluble in an aqueous solution, as the pore former in the coating. The inorganic pore former may be removed from...
|
|
|
4250004 |
Process for the preparation of low overvoltage electrodes
An improved process is described for the electrodeposition of both a low overvoltage metal and a sacrificial metal onto an electrically conductive substrate. The sacrificial metal is later removed...
|
|
|
4248680 |
Electrolytic process and apparatus
Disclosed is an electrolytic cell having an anode, a cathode, and a synthetic fluoro-carbon-resin permionic membrane between the anode and cathode. The improvement is characterized by the...
|
|
|
4243497 |
Process for the electrolytic production of hydrogen in an alkaline
The invention relates to a process for the electrolytic production of hydrogen in an alkaline medium. The process consists in using a cathode, the active surface of which essentially consists of an...
|
|
|
4231813 |
Method of preparing a cathode electrocatalyst
Disclosed is an electrode having a substrate with an elecrically active surface film. The film has a relatively imporous, dense portion in contact with the substrate and containing cobalt,...
|
|
|
4230543 |
Cathode for electrolysis of aqueous solution of alkali metal halide
An improved cathode for the electrolysis of an aqueous solution of an alkali metal halide, which shows a reduced hydrogen overvoltage. The cathode comprises a metallic substrate and a coating of...
|
|
|
4230544 |
Method and apparatus for controlling anode pH in membrane chlor-alkali cells
An improved process and apparatus for pH control in the anode compartments of membrane chlor-alkali cells is disclosed wherein an anode is used having an oxygen evolution efficiency substantially...
|
|
|
4221644 |
Air-depolarized chlor-alkali cell operation methods
Disclosed are methods of operation for oxygen electrodes which maximize the power efficiency available from such oxygen electrodes while minimizing the voltage necessary to operate such oxygen...
|
|
|
4217186 |
Process for chloro-alkali electrolysis cell
An improved process and apparatus for pH control and energy savings in chlor-alkali electrolysis cells is disclosed wherein a fuel cell type spaced porous catalytic anode is utilized to chemically...
|
|
|
4181586 |
Cathode electrocatalyst
Disclosed is an electrode having a substrate with an electrically active surface film. The film has a relatively imporous, dense portion in contact with the substrate and containing cobalt,...
|
|
|
4169775 |
Protection of the low hydrogen overvoltage catalytic coatings
An electrolytic cell having auxiliary circuit means for applying a cathodic protection current to cathode and exposed metal parts to help prevent corrosion thereof during cell shut-down.
|
|
|
4142950 |
Apparatus and process for electrolysis using a cation-permselective membrane and turbulence inducing means
High current efficiency can be obtained in an electrolytic cell by inducing turbulence in the catholyte preferably by utilizing a gas-directing cathode and cation-permselective membrane...
|
|
|
4127457 |
Method of reducing chlorate formation in a chlor-alkali electrolytic cell
In a chlor-alkali electrolytic cell in which an aqueous alkali metal chloride solution is electrolyzed, said electrolytic cell having an anode compartment containing an anode and a cathode...
|
|
|
4060476 |
Anode for electrochemical processes
An anode for electrochemical processes consists of an electrode base plate of a metal which can be passivated electrochemically, a protective layer deposited thereon, and a further layer,...
|
|
|
3945907 |
Electrolytic cell having rhenium coated cathodes
The use of composite cathodes comprising a metal substrate having thereon a coating of rhenium in electrolytic cells for the electrolysis of aqueous alkali metal halide solutions reduces the cell...
|
|
|
3904496 |
Electrolytic production of chlorine dioxide, chlorine, alkali metal hydroxide and hydrogen
Chlorine dioxide, chlorine, alkali metal hydroxide and hydrogen are produced from hydrogen chloride, alkali metal chlorate, alkali metal chloride and water in a three compartment electrolytic cell...
|
|
|
3852175 |
ELECTRODES HAVING SILICON BASE MEMBERS
An electrode is disclosed having an electroconductive surface on an electroconductive silicon substrate. Also disclosed is an electrolytic cell containing an anode having an electroconductive...
|
|
|
3117023 |
Method of making a non-corroding electrode
|