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7604792 Separation of purified potassium sulfate from glaserite  
A method can, in one general aspect, include steps for the recovery of potassium sulfate and mirabilite from glaserite. In another general aspect, a method includes dissolving glaserite in water at...
7067094 Process for the brightening of sodium hydrogensulfate  
The process for the brightening of continuously produced sodium hydrogensulfate obtained in the reaction of sodium chloride and concentrated sulfuric acid in molten sodium hydrogensulfate in a...
7041268 Process for recovery of sulphate of potash  
The present invention is directed to a novel integrated process for the recovery of sulphate of potash (SOP) from sulphate rich bittern. The process requires bittern and lime as raw materials....
6986878 Method of producing potassium sulfate via cation exchange  
A process for producing potassium sulfate from potash and sodium sulfate, which involves providing a source of sodium sulfate and passing the sodium sulfate through cationic exchanger. Eluted...
6767528 Manufacture of hydrogen chloride from salt and sulfuric acid  
The specification discloses a continuous process for producing hydrogen chloride whereby sulfuric acid and an alkali metal chloride are fed to a direct fired reaction chamber in a molar ratio of...
6676917 Process for the production of hydrochloric acid and neutralized sulfates  
A process for the production of hydrochloric acid and neutralized sulfates comprising: reacting sulfuric acid with an alkaline metal chloride in order to obtain a liquor containing hydrochloric...
6365122 Process for manufacturing potassium sulfate fertilizer and other metal sulfates  
A new process of preparing potassium sulfate fertilizer and other metal sulfates from the chlorides and other halides of these metals. The process utilizes the discovery that sulfur dioxide or...
6334990 Formulation of potassium sulfate, sodium carbonate and sodium bicarbonate from potash brine  
A process for the preparation of potassium sulfate, sodium bicarbonate and sodium carbonate. The process involves the treatment of potash brines by the reaction of sodium chloride and potassium...
6315976 Method of producing potassium sulfate  
A process is provided for producing potassium sulfate by reacting ammonium sulfate and potassium chloride at a temperature of about 30 to 40° C. to produce a slurry containing K 2 SO 4 NH 4...
6143271 Process for producing potassium sulfate from potash and sodium sulfate  
The present invention provides a process for producing potassium sulfate from a potash and a sodium sulfate source, comprising the steps of: (a) treating a portion of the potash source and sodium...
5552126 Co-production of potassium sulfate, sodium sulfate and sodium chloride  
A process for producing potassium sulfate, sodium sulfate, and sodium chloride from potash and a sodium sulfate/water source, which includes: (a) treating the sodium sulfate/water source to produce...
5549876 Production of potassium sulfate using differential contacting  
A process for the manufacture of potassium sulfate from a sodium sulfate source, potash and water, comprising the steps of: (a) introducing the sodium sulfate source, water and potash into a...
5529764 Co-production of potassium sulfate and sodium sulfate  
A process for producing potassium sulfate or potassium sulfate and sodium sulfate from potash and a sodium sulfate/water source, which includes: (a) subjecting a sodium sulfate source to conversion...
5518583 Zero discharge mill distillation, salt recovery, and water management  
In minimizing effluents from a cellulose pulp mill, liquid effluents from a bleach plant are concentrated, and then incinerated to produce a residue including sodium, sulfate, and sodium chloride....
5482696 Method for the purification and/or electrolysis of an aqueous potassium chloride solution  
The present invention concerns a method for the purification and/or electrolysis of an aqueous potassium chloride solution, in which the sulphate ions are removed from the aqueous potassium...
4707347 Process for the production of potassium sulfate from potassium chloride by means of ion exchangers  
A process is disclosed for the production of potassium sulfate from potassium chloride by means of a sulfate-laden anion exchanger, according to which as reaction solution, the exchanger is...
4588573 Method for the production of potassium sulfate using sulfuric acid and potassium chloride  
Potassium chloride and sulfuric acid are reacted in a recycled aqueous solution in the stoichiometric ratio required for potassium sulfate production. Hydrogen chloride produced by the reaction of...
4562058 Process for crystallizing potassium sulfate  
An improved process for the production of potassium sulfate crystals by the reaction of saturated solution of potassium chloride with langbeinite in the solid phase at a temperature of from...
4504458 Gypsum conversion  
Gypsum as a byproduct in the manufacture of phosphoric acid is converted into potassium sulphate or sodium sulphate by subjecting an aqueous slurry to anion exchange under acidic conditions. Adding...
4436710 Method of manufacturing potassium sulfate  
This improved method comprises a first dry step of reacting concentrated sulfuric acid and potassium sulfate with potassium chloride at about 300° C. in a slurried state to obtain a mixed slurried...
4427637 Apparatus for producing an alkali metal salt of a mineral acid, and a process  
An apparatus is disclosed for producing an alkali metal salt of a mineral acid, characterized by the provision of a specific agitating means, said agitating means having a pair of shafts adapted to...
4420468 Method of treating converted potassium sulfate for reducing a small amount of chlorine contained therein  
A small amount of chlorine contained in the converted potassium sulfate obtained by dry-mixing and heating potassium chloride with sulfuric acid or potassium hydrogensulfate can greatly be reduced...
4406736 Method of bleaching pulp with an aqueous solution of chlorine dioxide and chlorine followed by a chlorine solution  
The advantages of the serial application of chlorine dioxide and chlorine without intermediate wash during the bleaching of wood pulp in the absence of significant amounts of dissolved organic...
4371512 Production of alkali metal sulfates  
Alkali metal sulfates are produced from an aqueous solution containing alkali metal hydrogen sulfate which comprises contacting the aqueous solution of alkali metal hydrogen sulfate with a...
4342737 Process of producing a potassium sulfate salt  
A process of producing a potassium sulfate salt comprising reacting sulfuric acid with potassium chloride at an equivalent ratio of sulfuric acid to potassium chloride of 1.07 to 1.40 at a...
4303619 Apparatus for continuously producing potassium sulfate  
An improved apparatus for producing potassium sulfate and hydrogen chloride gas from potassium hydrogen sulfate and potassium chloride is provided, which comprises a horizontal type muffle furnace...
4269817 Production of chlorine from chloride salts  
A process for converting chloride salts and sulfuric acid to sulfate salts and elemental chlorine is disclosed. A chloride salt and sulfuric acid are combined in a furnace where they react to...
4242312 Removal of sodium sulfate from a sulfate-containing sodium chloride solution in a process for separating zirconium and hafnium  
There is disclosed, in a process for separating zirconium and hafnium, an improvement for the removal of sodium sulfate from a sulfate-containing sodium chloride solution. This improvement includes...
4215100 Method of producing potassium sulfate  
A method of producing potassium sulfate consists in conversion of sodium sulfate with potassium chloride in an aqueous medium to yield glaserite and a glaserite solution. Then, the glaserite is...
4196226 Alkali metal aluminum phosphate  
Alkali metal aluminum phosphate granules having a calcium rich outer surface are provided which are characterized by improved flow and dusting properties as well as lower hygroscopicity without a...
4195070 Preparation of a MgCl.sub.2 solution for Nalco's MgCl.sub.2 process from MgSO.sub.4 and other MgSO.sub.4 salts  
A method of beneficiating a mixed salt mineral ore containing potassium and magnesium sulfates and/or their hydrates which allows the recovery of anhydrous magnesium chloride and the simultaneous...
4174382 Process for the production of coarse K.sub.2 SO.sub.4 in crystallizers and classifiers  
A process for selectively recovering coarse crystalline K 2 SO 4 from a crystallizer is disclosed. A classifier comprising an elongated cylindrical vessel which is located separate from the...
4132759 Method of purifying brine used in electrolysis by the amalgam process  
In the process for the production of chlorine and alkali metal hydroxide by electrolysis according to the amalgam process using calcium- and/or sulphate containing crude salt, the calcium and/or...
4086329 Integrated chlorine dioxide producing system  
Chlorine dioxide and chlorine are produced by reduction of sodium chlorate with chloride ions in an aqueous acid medium having a total acid normality of 2 to 4.8 normal. The reaction medium is...
4079123 Process for the production of chlorine dioxide  
An improved process is provided for the production of chlorine dioxide and chlorine wherein an alkali metal chlorate and a strong acid selected from the group sulfuric acid, hydrochloric acid,...
4049785 Production of chlorine dioxide with product slurry metathesis  
An improved process for the production of chlorine dioxide wherein an alkali metal chlorate and a mineral acid are reacted in a single vessel, and the resultant alkali metal salt is converted to a...
4045543 Production of potassium sulfate and hydrogen chloride  
Potassium sulfate (K 2 SO 4 ) is prepared by reaction of potassium chloride and sulfuric acid in an aqueous medium by initially removing evolved HCl in the gaseous form at temperatures of about...
3998935 Manufacture of potassium sulfate  
Potassium sulfate (K 2 SO 4 ) is prepared by contacting potassium chloride with an aqueous solution containing potassium bisulfate at a temperature of about 65°-110° C., cooling the solution and...
3976761 Preparation of TiO.sub.2 and artificial rutile from sodium titanate  
Pigment TiO 2 is prepared from sodium titanate by mixing with sulfuric acid, calcining at from 600° to above about 900°C, thereafter quenching in water, dissolving out the soluble sodium sulfate...
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...
3933987 Simultaneous production of chlorine dioxide and a salt of a strong acid  
A process for the production of chlorine dioxide, chlorine and an inorganic salt comprising reacting an aqueous solution of a chlorate with hydrochloric acid under reduced pressure at a temperature...
3864458 Fluid bed incineration of chloride-containing waste streams  
Combustible waste materials containing chlorides are incinerated in a fluid bed reactor by a process in which formation of low-melting eutectics is avoided. Relatively refractory sulfate compounds...
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...
3864456 MANUFACTURE OF CHLORINE DIOXIDE, CHLORINE AND ANHYDROUS SODIUM SULPHATE  
A process for generation of chlorine dioxide and chlorine is disclosed in which anhydrous sodium sulphate is produced as a byproduct. Sodium chlorate, sodium chloride and sulphuric acid are charged...
3823676 METHOD OF REDUCING SULPHUR DIOXIDE EMISSIONS FROM COAL  
A method of reducing sulphur dioxide emissions from coal by adding an effective amount of Wyoming Trona to the coal for combining with sulphur in the coal to form a relatively heavy ash which is...
3717440 SOLID-LIQUID CONTACTING APPARATUS  
An apparatus for providing contact between a liquid and solid particles having an upright vessel with an upper outlet and a pair of lower outlets, a plurality of concentric upwardly directed inlets...
3669897 DIVALENT EUROPIUM ACTIVATED ALKALINE EARTH METAL SULFATES AND METHOD OF PREPARATION  
Divalent europium activated alkaline earth metal sulfates wherein the metal is at least one of calcium, barium, or strontium, and europium is present in atom percent of the alkaline-earth metal of...
3523787 HYDROMETALLURGICAL PROCESS FOR THE RECOVERY OF HIGH PURE COPPER VALUES FROM COPPER AND ZINC BEARING MATERIALS AND FOR THE INCIDENTAL PRODUCTION OF POTASSIUM SULFATE  
3493326 DOUBLE SALT HAVING THE FORMULA (NA2SO4)4.(NA2CO3)9  
3446584 METHOD OF PRODUCTION OF CHLORINE DIOXIDE AND SODIUM SULFATE  
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