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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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5145660 |
Procedure for production of chlorine dioxide
The invention describes a procedure for production of chlorine dioxide where, in a primary reactor chlorate, sulphuric acid and a reducing agent with optional extra additions of chloride ions are...
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4678655 |
Acid recovery in clorine dioxide generation
Effluent acid from a non-evaporating chlorine dioxide-generating process is subjected to diffusion-dialysis across an anion-exchange membrane to preferentially transfer sulphuric acid from the...
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4618479 |
Apparatus for producing chlorine dioxide
A continuous method and apparatus for the efficient production of gaseous chlorine dioxide by the reaction between gaseous sulfur dioxide and an aqueous solution of a metallic chlorate. The...
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4578261 |
Method to reduce the potential salt cake content of chlorine dioxide generator spent acids
A method of generating chlorine dioxide that comprises forming chloric acid by the action of sulphuric acid on a chlorate in a generator in the liquid phase. The chloric acid is reduced to produce...
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4451444 |
Method and apparatus for producing chlorine dioxide
A continuous method and apparatus for the efficient production of gaseous chlorine dioxide by the reaction between gaseous sulfur dioxide and an aqueous solution of a metallic chlorate. The...
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4329199 |
Process for digesting and bleaching cellulosic material with reduced emissions
The digestion of the cellulose-containing material is performed with a digestion liquor containing sulphur and sodium followed by recovery and regeneration of said digestion liquor and bleaching of...
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4156713 |
Production of chlorine dioxide
There is provided an improved process for the production of chlorine dioxide wherein an alkali metal chlorate a reducing agent, and a mineral acid are reacted in a vessel, and the salt crystals are...
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4129484 |
Process for regeneration of spent reaction solutions
This invention relates to a process for working up residual solutions from a reactor, in which chlorate (i.e. sodium chlorate) is reduced to chlorine dioxide in the presence of an acid.
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4115217 |
Process for electrolytic preparation of chlorites
This invention relates to a process for the preparation of chlorite from chlorate.
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4105751 |
Process and installation for the manufacture of chlorine dioxide
Chlorine dioxide is manufactured by reducing an alkali metal chlorate in an acid medium by means of a gaseous or liquid reducing agent in at least one production reactor, with recycling of the tail...
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4098639 |
Process for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material
A process is provided for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material with alkaline sodium- and sulfur-containing-sulfate pulping...
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4051229 |
Process for manufacturing chlorine dioxide
Chlorine dioxide is generated very efficiently and safely by reducing a chlorate in a strong acid in the presence of a complex catalyst consisting of palladium (II) and a β-diketone.
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3950500 |
Method of producing chlorine dioxide
Chlorine dioxide is produced by the reaction of sodium chlorate with sulfur dioxide in the presence of gaseous chlorine.
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3933988 |
Method of simultaneously producing chlorine dioxide and a sulfate salt
A process for the production of chlorine dioxide and a sulfate salt comprising mixing an aqueous solution of a chlorate, sulfuric acid and sulfur dioxide, reacting said mixture under reduced...
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3864457 |
PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE
Disclosed is an improved process for the production of chlorine dioxide by the reaction of an alkali metal chlorate with sulfur dioxide in an acidic medium containing chloride ions. The improvement...
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3816077 |
CHLORINE DIOXIDE GENERATING SYSTEM
A chlorine dioxide producing system comprising a generator-evaporator-crystallizer reaction tower, a condenser, a chlorine dioxide absorption tower, vacuum producing means, a chlorine absorption...
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3593494 |
PROCESS FOR THE SEPARATION OF GASEOUS MIXTURES OF CYANOGEN CHLORIDE AND HYDROGEN CHLORIDE
Process for the separation of hydrogen chloride from gaseous mixtures incorporating the same in admixture with cyanogen chloride, involving absorption of the hydrogen chloride in water followed by...
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3446584 |
METHOD OF PRODUCTION OF CHLORINE DIOXIDE AND SODIUM SULFATE
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3427236 |
PROCESS FOR THE PREPARATION OF AN ALKALI METAL CHLORATE SOLUTION FOR USE IN A CHLORINE DIOXIDE GENERATION PROCESS
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3347628 |
Production of chlorine dioxide
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3107147 |
Process for the manufacture of chlorine dioxide
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2969276 |
Method of controlling the continuous production of chlorine dioxide
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2895801 |
Process for producing chlorine dioxide
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2811420 |
Chlorine dioxide generation
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