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7485160 |
Hydrogen generating apparatus, hydrogen generating system and use thereof
A hydrogen generation apparatus is constituted of a treated-substance container, which has a hydrogen discharge port for activating a treated substance; and at least one plate-form activation...
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7273541 |
Microfluid device and synthetic methods
A method of electrolytic synthesis comprises applying a potential between a first electrode and a second electrode. The first electrode is in contact with a first fluid stream in a channel, the...
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6685821 |
Method and system for producing high-pressure hydrogen
Disclosed are methods and systems for generating hydrogen gas at pressures high enough to fill a hydrogen storage cylinder for stationary and transportation applications. The hydrogen output of an...
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6497973 |
Electroconversion cell
A system for generating and consuming borohydride ions comprising two electrochemical cells. At least one of the cells is configured for installation on a vehicle that is propelled by electricity.
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6361674 |
Powered lift for ECP chamber
An electrochemical deposition system comprising a fixture adapted to selectively grasp and release an electrochemical process cell is provided. The system may include a lift/lower mechanism coupled...
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6165341 |
Catalytic film, methods of making the catalytic films, and electrosynthesis of compounds using the catalytic film
In one embodiment, the present invention relates to a method of making a catalytic film comprising: applying an electric current to an electrochemical cell comprising an anode, a cathode and a...
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5705048 |
Apparatus and a process for regenerating a CUCl.sub.2 etchant
The present invention relates to an apparatus and a process for regenerating a used etchant solution, which solution contains a metal in divalent form. The apparatus includes a tank which is...
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5670035 |
Method for recovering copper
An improved process is described for the recovery of copper from an aqueous feed solution using solvent extraction and electrowinning in which the electrowinning is conducted in a first step...
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5466347 |
Method for electrolyzing aqueous solution of alkali chloride
The present invention is intended to prevent the formation of impurities such as chlorate in electrolysis using the ion exchange membrane method, without resorting to the addition of hydrochloric...
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5372683 |
Method and apparatus for the electrolytic extraction of metals from a solution containing metal ions
For the electrolytic extraction of metal from a solution containing metal ions and situated in a first cell, metal is cathodically deposited by means of an anode on an electrically conductive...
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5240569 |
Magnetically enhanced electrolysis cell system
The system includes at least one electrolysis cell having a principal direction of current flow. The electrolysis cell has two electrode surfaces whose mean surface planes are substantially...
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5112447 |
Process for electroplating
In the electroplating of certain metals, such as zinc, a metal build-up in the electroplating bath occurs due to a higher anode efficiency than cathode efficiency, in the cell, and also due to...
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4693790 |
Method for monitoring the quality of ZnSO.sub.4 electrolyte containing Sb (V)
Certain continuous methods for monitoring the quality of ZnSO 4 electrolyte lose sensitivity when the electrolyte contains Sb (V). The sensitivity can be increased by electrochemically reducing Sb...
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4589966 |
Membrane cell jumper switch
An electrolytic cell jumper switch system is disclosed which eliminates all damaging reverse currents without utilizing any additional rectifiers, power supply or auxiliary power or current sources...
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4533442 |
Lithium metal/alloy recovery from multi-component molten salt
An electrolytic process is provided for the recovery of lithium values from a molten salt bath containing MgCl 2 , CaCl 2 , NaCl, KCl and LiCl. The salt composition in the molten state is subjected...
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4502928 |
Method and apparatus for producing halogen
A halogen production apparatus comprising a halogen production device and a metal-halogen secondary cell which contains in its electrolyte the same halogen as is produced by the production device....
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4483753 |
Method of continuously extracting magnesium
A method of continuously extracting magnesium by subjecting chloride electrolytes to electrolysis consists of enriching an electrolyte in magnesium chloride and refining the same, mixing the...
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4445987 |
Electrolytic purification and reconcentration of wash and rinse caustic solutions recovered from the regeneration of ion exchange resins
Diluted and contaminated caustic solutions coming from the regeneration and washing of ion exchange resins may advantageously be purified and reconcentrated to be reused during the subsequent...
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4427505 |
Apparatus for recovering metals from solution
An electrolytic metal recovery unit for extracting silver from a silver rich solution comprises a holding tank for stock solution, an air lift pump to feed solution from the tank to an elevated...
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4415413 |
Method of concentrating alkali metal hydroxide in a cascade of hybrid cells
Process for the simultaneous production of alkali metal hydroxide and electricl energy. A plurality of hybrid cells (1) are operated in series with an aqueous solution of alkali metal hydroxide...
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4405418 |
Process for the production of sodium chlorate
A process for the production of sodium chlorate comprising electrolyzing an aqueous sodium chloride solution in a diaphragmless sodium chlorate cell, characterized in that an aqueous sodium...
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4351705 |
Refining copper-bearing material contaminated with nickel, antimony and/or tin
In a copper refinery including smelting, converting and electrolytic refining steps, feed material containing copper and contaminated with iron and one or more impurity metals selected from the...
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4345978 |
Method and apparatus for preparing aromatic hydrazo or diaminodiphenyl compounds
A method and apparatus for preparing aromatic hydrazo compounds by electrochemical reduction of aromatic nitro compounds on a technical scale. The reaction is carried out continuously and in two...
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4313805 |
Chlorine cell catholyte series flow
Improvements in electrolytic chlor-alkali membrane cells, operated with cell-to-cell catholyte series flow, are obtained by the use, as membranes, of fluoropolymers containing pendant functional...
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4305793 |
Method of concentrating alkali metal hydroxide in hybrid cells having cation selective membranes
Alkali metal hydroxide solutions are purified and concentrated by electrolysis of such solutions in the anode compartment of a hybrid cell comprising an anode compartment and a cathode compartment...
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4242184 |
Membrane cell chlor-alkali process having improved overall efficiency
A process for the preparation of an alkali metal hydroxide and halogen from an alkali metal halide in a plurality of electrolytic cells, wherein each electrolytic cell is physically arranged in...
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4230542 |
Electrolytic process for treating ilmenite leach solution
A method of reducing ferric ions in a sulfuric acid ilmenite leach solution to ferrous ions comprising circulating a sulfuric acid ilmenite leach catholyte solution through the cathodic compartment...
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4217187 |
Operation of electrolytic diaphragm cells utilizing interruptable or off-peak power
A method of operating a plurality of electrolytic diaphragm cells utilizing interruptable or off-peak electrical power varying from a higher electrical load level to a lesser electrical load level...
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4183794 |
Zinc extraction method
A method of extracting primary zinc metal from ore concentrates is described. The method includes providing first and second electrolytic cells, the first cell receiving an acid zinc sulfate...
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4152226 |
Process and apparatus for monitoring amalgam electrolysis cells
The sodium concentration in the amalgam of an electrolysis cell is automatically monitored by periodically removing an amalgam sample of predetermined quantity from the end compartment of the...
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4147600 |
Electrolytic method of producing concentrated hydroxide solutions
A method for economically producing a concentrated alkali metal hydroxide solution by electrolytic means is described. The method involves the tandem operation of diaphragm and membrane...
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4076603 |
Caustic and chlorine production process
Alkali metal hydroxide and chlorine are produced in a membrane-equipped electrolysis cell system in a staged manner wherein at least one cell of the system is used to generate a dilute caustic...
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4071421 |
Process for the recovery of zinc
A process for recovering zinc and manganese dioxide from material containing zinc and manganese compounds, includes leaching the material to provide an aqueous solution containing manganese and...
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4058440 |
Concurrent separation of lithium and hydrogen isotopes
A method of separating light hydrogen and deuterium which makes use of the differential reaction rates of alkali metal amalgams with water containing light hydrogen and water containing deuterium....
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4057474 |
Electrolytic production of alkali metal hydroxide
In the process of making aqueous alkali metal hydroxide solution and diatomic halide gas by electrolysis of aqueous alkali metal halide solution in a bank of cationic permselective membrane cells,...
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4042473 |
Process for recovery of re-usable substances from a fixing bath in processes for development and fixing of photographic films and X-ray films
Apparatus and a process for electroylic recovery of silver from fixing baths obtained by development of photographic films wherein the fixing bath solution coming from the tank for the fixing bath...
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4035250 |
Production of perfluoro-n-heptane
Perfluoro-n-heptane is produced by an electrochemical fluorination process comprising cooling the effluent from a first cell to a temperature sufficient to condense such effluent, separating a...
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3983016 |
Method of preparing chromium
Disclosed is a method of operating a chromium metal electrolytic cell in series with a chromic acid cell. The feed to the chromium metal cell is the chromic acid-alkali metal dichromate effluent...
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3969207 |
Method for the cyclic electrochemical processing of sulfuric acid-containing pickle waste liquors
The invention relates to a process for the cyclic electrochemical processing of pickle waste liquors containing a maximum 100 g. of sulfuric acid and a minimum of 25 g. of iron ions per liter,...
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3905879 |
Electrolytic manufacture of dithionites
Dithionites are made by a process which begins with the production of high concentration, chloride-free sodium hydroxide solution and chlorine at a high current efficiency from a three-compartment...
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3899403 |
Electrolytic method of making concentrated hydroxide solutions by sequential use of 3-compartment and 2-compartment electrolytic cells having separating compartment walls of particular cation-active permselective membranes
A concentrated hydroxide solution containing over 250 g./l. of sodium hydroxide is made by a two-cell aqueous sodium chloride electrolysis process wherein, in a first cell, containing at least...
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3897320 |
Electrolytic manufacture of chlorates, using a plurality of electrolytic cells
A sodium chloride solution is electrolyzed to produce a high strength caustic solution and sodium chlorate solution, using two different electrolytic cells. In the first cell, a two-compartment...
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3891741 |
Recovery of fission products from acidic waste solutions thereof
Fission products, e.g., palladium, ruthenium and technetium, are removed from aqueous, acidic waste solutions thereof. The acidic waste solution is electrolyzed in an electrolytic cell under...
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3888749 |
Electrolytic separation of oxygen from air
An electrolytic process for the separation of oxygen from air wherein compressed air is charged to a system of two cells, with an electrolyte being circulated between said cells and differing...
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3616332 |
PROCESS FOR RECOVERING SILVER FROM SCRAP MATERIALS AND ELECTROLYTE COMPOSITION FOR USE THEREIN
Substantially pure silver is economically and effectively recovered from scrap material, such as scrap material containing silver, silver oxide and other metals such as cadmium, copper, nickel and...
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3479262 |
OLEFIN OXIDATION PROCESS
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3472746 |
ELECTROLYTIC SYSTEM FOR PRODUCTION OF ALKALI METALS
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3418225 |
Electrolytic method and apparatus for reclaiming metals from electrolytes
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3401100 |
Electrolytic process for concentrating carbon dioxide
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3400063 |
Two-stage electrolytic process for preparing high-concentration sodium chlorate soluttions
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