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7252096 |
Methods of simultaneously cleaning and disinfecting industrial water systems
On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water...
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7087208 |
Methods for making chlorous acid and chlorine dioxide
Chlorous acid is generated from a chlorite salt precursor, a chlorate salt precursor, or a combination of both by ion exchange. The ion exchange material facilitates the generation of chlorous acid...
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7070710 |
Chemical composition and method
The invention relates to a novel composition useful as a feed at production of chlorine dioxide, said composition being an aqueous solution comprising from about 1 to about 6.5 moles/liter of...
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6972121 |
Advanced control strategies for chlorine dioxide generating processes
Chlorine dioxide generating processes of the single vessel type which produce chlorine dioxide of high purity are monitored and controlled by a computer using Advanced Control Strategies for...
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6921521 |
Method of producing chlorine dioxide employs alkaline chlorate in a mineral acid medium and urea as a reducing agent
A method of producing chlorine dioxide (ClO 2 ) is described which employs Urea as a reducing agent to reduce alkaline chlorate (NaClO 3 or KClO 3 ) in a mineral acid medium. The method of the...
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6790427 |
Process for producing chlorine dioxide
The invention concerns a process and an apparatus for continuously producing chlorine dioxide, the process comprising the steps of feeding chlorate ions, acid and hydrogen peroxide as aqueous...
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6635230 |
Method for producing chlorine dioxide
A method for producing chlorine dioxide by activating zeolite crystals (which have been impregnated with metal chlorite such as sodium chlorite, and optionally also a water-retaining substance such...
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6605558 |
Composition for producing chlorine dioxide
A method for producing chlorine dioxide by activating zeolite crystals (which have been impregnated with metal chlorite such as sodium chlorite, and optionally also a water-retaining substance such...
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6585950 |
Method of producing chlorine dioxide
The invention relates to a process of producing chlorine dioxide comprising the steps of reducing chlorate ions in an acid reaction medium maintained in a reaction zone of a chlorine dioxide...
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6576213 |
Method of producing chlorine dioxide
The invention relates to method of producing chlorine dioxide comprising the steps of: providing a reactor with an aqueous acidic reaction medium containing chlorate ions; reacting said chlorate...
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6555085 |
Method of improving yield of chlorine dioxide generation processes
A greater yield of chlorine dioxide from a chlorine dioxide generating process is obtained by providing acidic or acidity-generating components in the product chlorine dioxide solution to provide a...
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6287533 |
Production of chlorine dioxide by chemical reduction of ammonium chlorate in aqueous acidic solution
A novel method is described whereby chlorine dioxide is produced through the chemical reduction of ammonium chlorate in an aqueous acidic solution. The reduction reaction takes place at elevated...
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6251357 |
High purity alkali metal chlorite and method of manufacture
Alkali metal chlorite, particularly sodium chlorite, is produced with a low carbonate level by combining a chlorine dioxide generating system operating at subatmospheric pressure with a chlorite...
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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...
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5895638 |
Method of producing chlorine dioxide
The invention relates to a process of producing chlorine dioxide by the reduction of chlorate ions with hydrogen peroxide as a reducing agent in a tubular reactor, preferably in the presence of a...
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5858322 |
Process of producing chlorine dioxide
The invention relates to a process of producing chlorine dioxide comprising the steps: Providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and sulfate;...
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5853689 |
Method for producing chlorine dioxide by activating an impregnated zeolite crystal mixture, and mixtures for performing such method
A method for producing chlorine dioxide by activating a mixture of impregnated zeolite crystals, the mixture itself, and a method for regenerating the mixture after chlorine dioxide production. The...
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5851374 |
Process for production of chlorine dioxide
Chlorine dioxide is produced by reaction of chlorate ions, usually provided by sodium chlorate, with a persulfate in an aqueous acid reaction medium containing sulfuric acid. By-product sodium...
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5770171 |
Process for production of chlorine dioxide
A process for production of chlorine dioxide which is substantially free of by product chlorine. Chlorine-dioxide is produced from an alkali metal chlorate, a mineral acid and a reducing agent such...
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5693252 |
Generation of chlorine dioxide in a non-aqueous medium
A method of preparing chlorine dioxide in a non-aqueous liquid is disclosed. An aqueous solution of chlorine dioxide is mixed and agitated with a non-aqueous liquid. The chlorine dioxide is...
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5676920 |
Chlorine dioxide generating process
Chlorine dioxide is produced by reaction of sodium chlorate, a reducing agent, preferably methanol or hydrogen peroxide, and sulfuric acid at the boiling point of the reaction medium under a...
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5599518 |
Catalytic process for chlorine dioxide generation from chloric acid
A process and apparatus for producing chlorine dioxide comprising chemically reducing chloric acid with water in the presence of any oxygen-evolving catalyst and in the absence of another acid or...
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5593653 |
Metathesis of acidic by-product of chlorine dioxide generating process
Sodium sesquisulfate produced in crystalline form in a high acidity highly efficient chlorine dioxide generating process is converted by metathesis to crystalline anhydrous neutral sodium sulfate...
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5565182 |
Process of producing chlorine dioxide
The invention relates to a process of producing chlorine dioxide using, in a first alternative atmospheric pressure and hydrogen peroxide in the reaction medium optionally with an electrolytic...
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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...
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5523072 |
Process of producing chlorine dioxide
Disclosed is a process of producing chlorine dioxide having the steps of providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and phosphate; reducing chlorate...
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5486344 |
Method of producing chlorine dioxide
The invention relates to a method of producing chlorine dioxide, which method comprises reacting chloric acid with hydrogen peroxide as a reducing agent in such proportions that chlorine dioxide is...
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5439555 |
Minimum adverse environmental pulp with feed to chlorate manufacture
Liquid effluent from a pulp mill bleach plant having at least one chlorine chemical bleach stage is evaporated and then used in chlorate manufacture. The bleach plant effluent produced by...
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5433938 |
Chlorine-destruct method
An improvement is provided in a process for the preferential removal of chlorine from an aqueous solution of chlorine dioxide and chlorine which has been prepared by the process of reducing a...
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5423958 |
Acidity control in chlorine dioxide manufacture
A method for generating chlorine dioxide by reduction of sodium chlorate includes electrolyzing sodium sulfate by-product to form acid. The acid is then used to acidify the chlorine dioxide...
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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...
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5399332 |
Dynamic leaching procedure for metathesis
Solid sodium sesquisulfate is metathesized by water to neutral anhydrous sodium sulfate and to recover the acid values therefrom by employing a dynamic leaching of the solid phase sodium...
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5380517 |
Process for continuously producing chlorine dioxide
A process for continuously producing chlorine dioxide by reacting an alkali metal chlorate, sulfuric acid or another chlorine free mineral acid and hydrogen peroxide as reducing agent to produce...
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5378447 |
Method for the preparation of chlorates from waste gas streams obtained from the production of chlorine dioxide
A process is disclosed for producing a dilute solution of an alkali or alkaline earth metal chlorate from a chlorine and carbon dioxide waste gaseous stream. The process of the invention can be...
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5376350 |
Plug flow process for the production of chlorine dioxide
A plug flow process for the production of chlorine dioxide by reacting chloric acid and/or an alkali metal chlorate, optionally a mineral acid and a reducing agent in such proportions that chlorine...
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5366714 |
Hydrogen peroxide-based chlorine dioxide process
Chlorine dioxide is continuously produced at high efficiency in a single vessel process by reduction of chlorate ions with hydrogen peroxide in an aqueous acidic medium. The hydrogen peroxide is...
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5354435 |
Effluent treatment in a process for producing chlorine dioxide from chloric acid
The novel process of the invention produces chlorine dioxide by feeding an aqueous solution of chloric acid to a chlorine dioxide generator. The aqueous solution of chloric acid is reacted with a...
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5342601 |
Process for producing chlorine dioxide
A process which comprises heating a reaction mixture comprised of an aqueous solution containing perchlorate ions, chlorate ions and hydrogen ions to produce chlorine dioxide and oxygen gas. The...
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5324497 |
Integrated procedure for high yield production of chlorine dioxide and apparatus used therefor
A novel continuous process and system are provided for the production of chlorine dioxide at favorable economics and high efficiency. The process involves effecting electrolysis of an aqueous...
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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.
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5300191 |
Chlorine dioxide generation for a zero discharge pulp mill
Chloride dioxide for a cellulose pulp mill bleach plant is produced by concentrating (evaporating) liquid effluents from the bleach plant to a concentration level high enough for incineration,...
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5296108 |
Electrochemical process for generating chlorine dioxide using chloric acid-alkali metal chlorate mixtures
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...
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5294307 |
Integrated process for the production of alkali and alkaline earth metal chlorates and chlorine dioxide
An integrated process for the production of alkali or alkaline earth metal chlorates and chlorine dioxide in which the chromium compound impurities in the alkali or alkaline earth metal chlorate...
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5284553 |
Chlorine dioxide generation from chloric acid
Chlorine dioxide, useful as a pulp mill chemical, is produced without producing sodium sulfate effluent for disposal, by effecting reduction of chloric acid in an aqueous reaction medium in a...
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5248397 |
Chlorine dioxide generation from chloric acid - alkali metal chlorate mixtures
A process for producing chlorine dioxide is provided which reacts an aqueous solution of chloric acid and an alkali metal chlorate with a solution of a non-oxidizable acid in the presence of an...
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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...
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5223103 |
Electrochemical process for producing chloric acid-alkali metal chlorate mixtures
A process for producing chlorine dioxide from an aqueous solution of chloric acid and alkali metal chlorate which is prouced in a electrolytic cell having an anode compartment, a cathode...
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5204081 |
Process for the generation of chlorine dioxide
A process for the rapid generation of chlorine dioxide under reduced pressure. A reaction column having a venturi therein and a reaction chamber in fluid communication with the nozzle of the...
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5165911 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Process for producing chlorine dioxide
A process which comprises heating a reaction mixture comprised of an aqueous solution containing perchlorate ions, chlorate ions and hydrogen ions to produce chlorine dioxide and oxygen gas. The...
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5154910 |
Process for the production of chlorine dioxide
A process for the production of essentially chlorine free chlorine dioxide whereby a flow of chlorine dioxide obtained from reduction of alkali metal chlorate and containing by-product of chlorine...
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