|
Match
|
Document |
Document Title |
|
|
6572758 |
Electrode coating and method of use and preparation thereof
An electrolytic cell producing sodium chlorate uses an electrode, specifically an anode, having a surface or coating or treatment of a mixed metal oxide having ruthenium oxide as an...
|
|
|
6471871 |
Method for the removal of silicon and heavy metals from aqueous streams
A batch or continuous process for the removal by flocculation of silicon and heavy metal contamination from aqueous waste streams by the addition of an aluminum salt, particularly, aqueous streams...
|
|
|
5965004 |
Chlorine dioxide generation for water treatment
Chlorine dioxide is generated by electrochemical oxidation of sodium chlorite in an anode compartment of a cation-exchange membrane-divided cell in the presence of significant quantities of sodium...
|
|
|
5681446 |
Impurity removal for sodium chlorate
Control of sulfate and perchlorate impurity levels is provided in a procedure for manufacturing crystalline sodium chlorate by electrolyzing an aqueous solution of sodium chloride and crystallizing...
|
|
|
5662834 |
Alloys of Ti Ru Fe and O and use thereof for the manufacture of cathodes for the electrochemical synthesis of sodium chlorate
An alloy of formula: Ti 30 +x Ru 15 +y Fe 25 +z O 30 +t M u wherein M represent at least one metal selected from the group consisting of chromium, manganese, vanadium, tungsten, antimony,...
|
|
|
5547542 |
Process for purification and recycle of solutions
The invention relates to a process for treating a low-concentrated aqueous feed solution which includes at least one aqueous process stream from a pulp mill. The process includes concentrating the...
|
|
|
5545389 |
Process for the production of chlorine dioxide
A process for the production of chlorine dioxide by reacting at least one of chloric acid and an alkali metal chlorate, and hydrogen peroxide as the reducing agent in such proportions that chlorine...
|
|
|
5419818 |
Process for the production of alkali metal chlorate
The invention relates to a process for electrolytic production of alkali metal chlorate where the demand of pH-adjusting chemicals is largely covered by integrated production of acid and alkali...
|
|
|
5350495 |
Method for separating impurities from an aqueous alkali metal chlorate electrolyte
The invention relates to a method for separating sulphate from an aqueous electrolyte in an alkali metal chlorate process, thereby reducing the operating cost and increasing the possibility of...
|
|
|
5348683 |
Chloric acid - alkali metal chlorate mixtures and chlorine dioxide generation
An aqueous solution of chloric acid and alkali metal chlorate is produced in an electrolytic cell having an anode compartment, a cathode compartment, and at least one ion exchange compartment...
|
|
|
5322598 |
Chlorine dioxide generation using inert load of sodium perchlorate
A process for producing chlorine dioxide a solution of chloric acid is reduced in the presence of an externally added load of perchlorate ions to form chlorine dioxide.
|
|
|
5292406 |
Process for electrolytic production of alkali metal chlorate and auxiliary chemicals
The present invention relates to a process to limit the content of impurities in the production of alkali metal chlorate, by integrating the production of chlorate with the production of chlorine...
|
|
|
5264089 |
Production of chlorine dioxide employing chloric acid - alkali metal chlorate mixtures
A continuous process for producing chlorine dioxide which comprises feeding an aqueous solution of an alkali metal chlorate to a first ion exchange compartment of an electrolytic cell having an...
|
|
|
5242554 |
Electrolytic production of chloric acid and sodium chlorate mixtures for the generation of chlorine dioxide
An aqueous solution of chloric acid and alkali metal chlorate is produced in an electrolytic cell having an anode compartment, a cathode compartment, and at least one ion exchange compartment...
|
|
|
5215632 |
Fluoride removal from aqueous streams
Disclosed is a method of removing fluoride and sulfate ions from an aqueous stream by adding calcium chloride and a source of phosphate ion to the stream to form a first precipitate of calcium...
|
|
|
5176801 |
Sulfate removal from alkali metal chlorate solutions and production of alkali metal chlorate including said removal
A process for the removal of substantially chromium free sulfate from aqueous alkali metal solutions containing chromate and sulfate which includes mixing the solutions while having a pH of between...
|
|
|
5124009 |
Consumption of hypochlorite values contained in chlorate solutions of electrolysis
The objectionable hypochlorite values, ClO - ions, contained in a solution of an alkali metal chlorate produced by the electrolysis of an aqueous solution of the corresponding chloride of the...
|
|
|
5108722 |
Sulfate removal from chlorate liquor
Disclosed is a method of removing sulfate ion from an aqueous sodium chlorate liquor. A crystallization temperature is selected between about -15° and about 0° C. and the maximum concentration of...
|
|
|
5104500 |
Ion exchange removal of impurities from chlorate process liquors
Disclosed is an improved method of operating a sodium chlorate crystal production system where a brine stream is electrolyzed to form sodium chlorate, the sodium chlorate is crystallized in a...
|
|
|
5104499 |
Electrolytic production of alkali metal chlorates/perchlorates
The alkali metal chlorates (or perchlorates) are produced by electrolyzing the anolyte contained in the anode compartment of an electrolytic cell compartmentalized by means of a selectively...
|
|
|
5087334 |
Continuous process for the manufacture of potassium chlorate by coupling with a sodium chlorate production plant
The present invention relates to a continuous process for the manufacture of potassium chlorate by coupling with a plant for the production of sodium chlorate by electrolysis, the said plant...
|
|
|
5074975 |
Electrochemical cogeneration of alkali metal halate and alkaline peroxide solutions
This invention relates to a process and apparatus for the electrosynthesis of oxygenated halogen salts of alkali metals such as alkali metal halate, alkali metal hypohalite and alkali metal...
|
|
|
5063041 |
Process for the reduction of perchlorate in electrolytes used for the production of chlorate
The invention relates to a process for the reduction of the perchlorate content in electrolytes for chlorate production, whereby the electrolyte is subjected to the following process steps: a) a...
|
|
|
4946565 |
Process for the production of alkali metal chlorate
At the production of alkali metal chlorate by electrolysis of an electrolyte containing alkali metal chloride in an electrolyzer, impurities of silicon are removed by precipitation with iron ions....
|
|
|
4888099 |
Process for the production of alkali metal chlorate
The invention relates to a process for the production of alkali metal chlorates by electrolysis of alkali metal chloride. The electrolyte is prepared by addition of a crystal slurry having a dry...
|
|
|
4797186 |
Method and apparatus for operating a fuel cell in combination with an electrochemical cell to produce a chemical product
A method and apparatus is disclosed for operating a fuel cell 14 which produces electrical energy in combination with an electrochemical cell 12 which uses electrical energy to produce a chemical...
|
|
|
4795535 |
Process for the production of alkali metal chlorate
At the production of alkali metal chlorate by electrolysis of alkali metal chloride in an electrolyser a part of the liquid phase from the electrolyser is brought to a crystallizer for...
|
|
|
4773974 |
Production of hexavalent chromium for use in chlorate cells
By-product hypochlorite from the electrolytic production of chlorates, notably sodium chlorate, is used to form hexavalent chromium for use in the electrolysis process by oxidation of trivalent...
|
|
|
4705610 |
Anodes containing iridium based amorphous metal alloys and use thereof as halogen electrodes
Anodes comprising substrate materials coated with iridium based amorphous metal alloys having the formulae Ir i D d E e F f and Ir i Y y D d E e F f where Y is yttrium D is Ti, Zr,...
|
|
|
4704259 |
Removal of chromium from cell liquor
Soluble hexavalent chromium values are removed from aqueous chlorate solutions by employing a critical effective ratio of OH - :Cr 2 O 7 = ions of at least 3:1 in the aqueous chlorate solution...
|
|
|
4702805 |
Production of sodium chlorate
Process for the production of sodium chlorate by the electrolysis of sodium chloride contaminated with sodium sulphate wherein the sulphate concentration in the system is kept below a pre-selected...
|
|
|
4609442 |
Electrolysis of halide-containing solutions with amorphous metal alloys
Amorphous metal alloys have the formula M 1 a M 2 b M 3 c where M 1 is Fe, Co, Ni, Pd and combination thereof; M 2 is Ti, Zr, Hf, V, Nb, Ta and combination thereof; M 3 is Rh, Os,...
|
|
|
4560454 |
Electrolysis of halide-containing solutions with platinum based amorphous metal alloy anodes
A process for the generation of halogens from halide-containing solutions includes the step of conducting electrolysis of the solutions in an electrolytic cell having a platinum based amorphous...
|
|
|
4508602 |
Process for producing concentrated solutions containing alkali metal chlorates and alkali metal chlorides
A process for producing a concentrated aqueous solution of an alkali metal chlorate and an alkali metal chloride comprises feeding an aqueous alkali metal chloride solution to an electrolysis zone...
|
|
|
4470888 |
Method for preparing alkali metal chlorates by electrolysis
In the preparation of alkali metal chlorates, an aqueous alkali metal chloride is electrolyzed in the presence of at least one additive chosen from among silicates, fluorides, polybasic...
|
|
|
4469576 |
Apparatus for electrolytical production of alkaline chlorate
Disclosed is an improved process for electrolytically producing alkaline chlorate, carried out at an increased temperature by using an apparatus of a column type. The apparatus has a lower...
|
|
|
4466868 |
Electrolytic cell with improved hydrogen evolution cathode
An electrolytic cell having an improved hydrogen evolution cathode, said cathode being characterized by a conductive metal core and an integral Raney-type catalytic surface predominantly derived...
|
|
|
4446026 |
Process and solvent for extraction of the chromates present in an aqueous solution
The invention relates to a process and a solvent for extraction of the chromates present in an aqueous solution. According to the invention, the aqueous phase is brought into contact with an...
|
|
|
4430179 |
Portable method for filter press cell assembly
A method for assembling a filter press type of electrolytic cell is disclosed wherein tightening apparatus is employed at preferably multiple points about the periphery of the stacked electrodes to...
|
|
|
4422909 |
Electrolytic process for the manufacture of alkali metal halate
An electrolytic apparatus for the production of an alkali metal halate, such as sodium chlorate, from an aqueous solution of alkali metal halide, such as sodium chloride, includes vertical anodes...
|
|
|
4415460 |
Oxidation of organics in aqueous salt solutions
Organic impurities in aqueous salt solutions; e.g., alkali or alkaline earth chloride solutions in particular, brines, are oxidized with chlorate ions at a pH of no greater than 5.0 and a...
|
|
|
4376099 |
Process for recovering Cr(VI) ions from a chlorate cell liquor
From a chlorate cell liquor containing an alkali metal chlorate, an alkali metal chloride and Cr(VI) ions, Cr(VI) ions are recovered by means of a combination of simple chemical procedures and...
|
|
|
4344847 |
Process for obtaining energy, soft water and by-products from aqueous substances
The aqueous substance, for example sea water, is boiled, the steam produced is fed under pressure into a turbo-alternator turbine producing electricity, the residual steam is reduced into soft...
|
|
|
4300992 |
Activated cathode
Activated cathode for use in aqueous solution electrolysis comprises (a) a base plate made of a metal selected from the group consisting of titanium, tantalum, zirconium, niobium or an alloy...
|
|
|
4294815 |
Process of producing chlorine dioxide and, if desired, chlorine
A process for the production of chlorine dioxide by membrane electrolysis of aqueous sodium chloride, reaction of hydrogen and chlorine so-formed to form hydrogen chloride and reaction of the...
|
|
|
4259297 |
Chromate removal from concentrated chlorate solution by chemical precipitation
A method has been devised for removing hexavalent chromium from concentrated aqueous alkali metal chlorate solution by reacting the solution with an inorganic sulfur containing compound and...
|
|
|
4250003 |
Process for the electrolytic preparation of alkali metal chlorates
Improvement in the processes for the manufacture of alkali metal chlorates by electrolysis of alkali metal chlorides characterized by the fact that the temperature of electrolysis is reduced by...
|
|
|
4247375 |
Process of electrolyzing aqueous solution of alkali halides
An improvement in a process of electrolyzing an aqueous solution of an alkali metal halide in a membrane cell in which a pH above 1.0 is maintained in the anode chamber, the alkali metal halide...
|
|
|
4218293 |
Electrochemical apparatus and process for manufacturing halates
An apparatus for the manufacture of halate, such as sodium chlorate, includes an electrolytic cell having a plurality of anodes and cathodes, clearance passageways between which have electrolyte,...
|
|
|
RE30081 |
Ion exchange chromate removal
The present invention relates to removal of chromate from an aqueous solution of an alkali metal chlorate and chloride, particularly sodium chlorate and sodium chloride in a selected ratio which...
|