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7354506 |
Diaphragm cell for chlor-alkali production with increased electrode surface and method of manufacture thereof
The invention relates to a diaphragm electrolytic cell, for the production of chlorine and caustic soda having superimposed modules, and a method for increasing the electrodic surface of a...
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7128824 |
Method for electrolysis of aqueous solutions of hydrogen chloride
A method for the electrolysis of aqueous solutions of hydrogen chloride in order to produce chlorine, characterized in that the following process parameters are maintained for initial operation:
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6890418 |
Process for the electrolysis of an aqueous solution of alkali metal chloride
The invention describes a process for the electrolysis of an aqueous solution of alkali metal chloride, in particular sodium chloride, by the membrane process with an aqueous solution of alkali...
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6884337 |
Production of basic hydrogen peroxide for chemical oxygen-iodine laser devices
A method of generating basic hydrogen peroxide (BHP) fuel for a chemical oxygen-iodine laser (COIL) using stored alkali chloride, typically potassium chloride, and water. The alkali chloride and...
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6863798 |
Method of producing washing, cleaning and sterilizing solution and system using such solution
A washing, cleaning and sterilizing solution is produced by electrolyzing an electrolyte solution composed of mixed caustic soda and salt in an electrolyzer. The solution is used as it is or...
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6746592 |
Process for removing aluminum species from alkali metal halide brine solutions
A method for the reduction of soluble aluminum species in an evaporated salt alkali metal halide brine containing up to 500 ppb aluminum species to provide a brine feedstock suitable for use in a...
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6547948 |
Method of increasing the concentration of dilute brine in NaCl electrolysis plants using the membrane process
The present invention relates to a method of increasing the concentration of dilute brine in NaCl electrolysis plants using the membrane process, wherein the NaCl required is stored in a mass flow...
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6488833 |
Method for electrolysis of alkali chloride
Provided is a process which permits, upon preparation of chlorine and a caustic alkali by electrolyzing an aqueous alkali chloride solution in an ion-exchange-membrane-method alkali chloride...
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6402929 |
Method of operating alkali chloride electrolytic cell
A method of operating an alkali chloride electrolytic cell, comprising: providing an alkali chloride electrolytic cell comprising a gas diffusion cathode and a cation-exchange membrane, the gas...
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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...
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6309530 |
Concentration of chlor-alkali membrane cell depleted brine
This invention relates to methods, systems and installations for concentrating depleted brine produced by the electrolytic decomposition of concentrated brine in chlor-alkali membrane cells and to...
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6200455 |
Method for reducing the plating of nickel on vessels, piping and cells in an alkali metal hydroxide manufacturing process
A method to prevent cladding or plating of metals, such as nickel or iron in a continuous production of alkali metal hydroxides which involves several steps: electrolyzing an aqueous alkali metal...
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6139714 |
Method and apparatus for adjusting the pH of a liquid
A process for adjusting the pH of an aqueous flowable fluid includes an electrochemical mechanism for adjusting the pH of an aqueous flowable fluid and a mechanism for then electrochemically...
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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...
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6123826 |
Method for removal of nickel and iron from alkali metal hydroxide streams without requiring the use of sodium borohydride
The present invention relates to a method to control of the presence of nickel and/or iron in a caustic solution using at least two magnets to remove about one third of the nickel and/or iron...
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6080293 |
Electrolytic test machine
An electrolytic test machine is used for a corrosion resistance test for a test material comprised of a metal blank and a coating film. The electrolytic test machine is constructed so that an...
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6080298 |
Method for electrolysing a brine
Electrolysing an aqueous solution of sodium chloride by means of a cell comprising a cation-exchange membrane which divides the cell into an anode compartment and an cathode compartment in which...
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6007600 |
Method for producing copper in hydrometallurgical process
The invention relates to a method for producing copper in a hydrometallurgical process from copper-bearing raw materials, such as sulfidic concentrates. The concentrate is leached in a leaching...
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5855759 |
Electrochemical cell and process for splitting a sulfate solution and producing a hyroxide solution sulfuric acid and a halogen gas
The present invention relates to an electrochemical cell and a process for producing a hydroxide solution, sulfuric acid and a halogen gas from a hydrogen halide and a sulfate solution. In...
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5660713 |
Jumper switch means for electrolyzers electrically connected in series
The novel jumper switch means of the invention is directed to by-passing an electrolyzer in a row of electrolyzers electrically connected in series to permit removal of the by-passed electrolyzer...
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5651875 |
Process for producing alkali metal hydroxide
The invention concerns a method for producing an alkali metal hydroxide by a chlor-alkali electrolysis (1), wherein an alkali metal chloride solution is electrolyzed in order to form alkali metal...
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5567298 |
Method of operating chlor-alkali cells
Disclosed is an improved method of making chlorine and alkali metal hydroxide, e.g., sodium hydroxide, in an electrolytic cell of the type wherein a liquid permeable diaphragm separates the anolyte...
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5478447 |
Method for producing an aqueous industrial sodium chloride solution
Process for the manufacture of an industrial aqueous solution of sodium chloride, according to which an aqueous mixture (12) containing an aqueous solution of sodium chloride and of polyvalent...
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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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5264090 |
Method for the electrolysis of an alkali metal chloride using a cation exchange membrane
A method for the electrolysis of an alkali metal chloride in an electrolytic cell is disclosed, in which use is made of a cation exchange membrane comprising a carboxylate-containing fluorocarbon...
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5196095 |
Process for recovering a metal from an aqueous solution comprising a mixture of metal chlorides
A process for recovery of metal values from a mixed metal chloride containing leach solution by contacting the leach solution with a water immiscible solution of a complexing agent selective for...
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5186794 |
Alkali metal hydroxide generation system and the method therefor
Disclosed are both an apparatus and method for the radiation-augmented electrolytic production of alkali metal hydroxide, molecular halogen, and hydrogen. Reduction of electrical energy...
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5126019 |
Purification of chlor-alkali membrane cell brine
This invention relates to methods and systems for purifying brine for electrolysis in chlor-alkali cells, especially membrane cells by reducing the sulfate ion concentration, while at the same time...
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5104497 |
Electrochemical process for treating liquid electrolytes
A process for the manipulation of liquid electrolyte and gas during the operation of an electrochemical cell having at least one gas diffusion electrode and a counter electrode forming an...
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4857158 |
Sodium hydrosulfite electrolytic cell process control system
A process control system for a filter press membrane electrochemical cell is provided that utilizes a microcomputer for multi-tasking functions to concurrently execute four programs to control the...
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4832804 |
Electrolytic cell
An electrolytic cell which comprises at least one anode and at least one cathode, an inlet channel through which liquor may be charged to the electrolytic cell, and an outlet channel through which...
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4824534 |
Process for electrically separating the electrolyte-bearing mains from the electrolyte spaces of an electrochemical cell pile
In this process for electrically separating the electrolyte-bearing main from the electrolyte spaces of an electrochemical cell pile, the electrolyte is passed via drop sections directly from the...
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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...
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4767511 |
Chlorination and pH control system
System for automatic control of chlorine content and pH in swimming pools. This system includes an electrolytic cell for generation of chlorine and caustic soda as needed, and an acid supply system...
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4749453 |
Method and apparatus for making hydrochloric acid and sodium hydroxide
By combining the manufacture of sodium hydroxide and hydrochloric acid, and by using a fuel cell to optimize the energy consumption, the energy efficiency of the manufacture of NaOH and HCl can be...
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4734170 |
Electrolysis of aqueous solution of sodium chloride
A diaphragm electrolysis of an aqueous solution of sodium chloride is carried out by using a fluorinated cation exchange membrane which is made of a polymer having carboxylic acid groups as...
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4687558 |
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...
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4650551 |
Supported ion exchange membrane films
The invention is a method for forming a supported membrane film comprising: (a) at least partially coating a polytetrafluoroethylene fabric with a sizing composition; (b) contacting the...
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4647351 |
Process for generating chlorine and caustic soda using a membrane electrolysis cell coupled to a membrane alkaline fuel cell
A process for making chlorine gas and concentrating caustic soda comprising: (1) feeding a brine to the anolyte compartment solution and a dilute NaOH solution to the catholyte compartment of an...
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4610765 |
Seal means for electrolytic cells
A bipolar electrolytic cell assembly of the filter press-type comprising a first frame member, a second frame member, a separator interposed between the first and second frames to space apart an...
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4606765 |
Process for treating zinc-laden dust issuing from electric steel plant furnaces
In a hydrometallurgical process of treating zinc-laden dust issuing from electric steel plant furnaces the zinc-laden dust is subjected to a basic leaching or lixiviation in two steps. The dust is...
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4585527 |
Electrolytic cell
An electrolytic cell comprising an anode and cathode and a gasket of an electrically insulating composition in which the gasket is made of an electrically insulating composition which comprises a...
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4560453 |
Efficient, safe method for decoppering copper refinery electrolyte
The present invention is directed toward a method for removing copper from solutions containing arsenic and antimony and in which the copper concentration in the solution is sufficiently low...
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4537662 |
Method of electrically shorting an electrolytic cell
A method for electrically shorting a high current, low voltage, single, chloralkali, membrane, electrolytic cell of a certain configuration to permit first its removal from a system, comprised of a...
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4512853 |
Method of monitoring pH
A method of electrometrically monitoring the pH of an electrolyte in an electrolytic cell with a pH sensor having a reference electrode with a porous membrane is provided by placing the pH sensor...
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4508603 |
Fluorinated cation exchange membrane and use thereof in electrolysis of an alkali metal halide
A fluorinated cation exchange membrane is formed using a copolymer of a fluorovinyl ether (I) having the formula CF 2 CF--O--CF 2 --CFXOCF 2 ) l (CFX') m (CF OCFX") n A wherein l is 0 to...
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4505789 |
Dynamic gas disengaging apparatus and method for gas separation from electrolyte fluid
In an electrolytic cell there is provided an improved gas-liquid disengager design which employs an arcuate interior periphery in conjunction with the existing kinetic energy of the electrolyte...
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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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4496752 |
Production of epoxy compounds from olefinic compounds
Chlorine and tertiary alkanol dissolved in an inert organic solvent are reacted with aqueous alkali to produce tertiary alkyl hypochlorite which is recovered in the organic solvent and reacted with...
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4470889 |
Electrolytic cell having an improved ion exchange membrane and process for operating
An electrolytic cell and a process for electrolysis using the cell are provided. The electrolytic cell is separated into an anode chamber and a cathode chamber by a fluorinated polymer membrane;...
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