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7323150 |
Methods for recovering at least one metallic element from ore
A method for recovering at least one metallic element from ore or other material is described and includes reacting ore or other material with a salt capable of recovering the metallic element from...
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6267962 |
Compositions and methods of treatment using peat derivatives
Novel compositions containing at least one biologically active component derived from peat or similar composition, methods for their preparation and therapeutic uses for a variety of diseases,...
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6210583 |
Spent caustic pretreatment and enhanced oxidation process
A process for pre-treating a spent caustic stream prior to oxidation which includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent...
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5221528 |
Process for the preparation of sodium chloride
In a purification process for brine, impurities such as calcium, magnesium and/or sulphate are precipitated by the addition of calcium hydroxide (Ca(OH) 2 ) and sodium carbonate (Na 2 CO 3 )....
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5135734 |
Process for removing a residue containing sodium sulphate
Process for removing an industrial residue containing sodium sulphate, in which the sodium sulphate in the residue 7 is treated with a calcium salt 12 to precipitate calcium sulphate 13, which is...
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5093089 |
Process for the separation of sulphate
Process for separating sulphate from a contaminating chromium component contained in an aqueous liquor by the crystallization of a sulphate compound. The sulphate may be separated substantially...
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4900535 |
Recovery of fluoride values from waste materials
A process for the treatment of waste materials such as spent cathode liners involving combustion of the contained carbonaceous material, decomposition of the contained cyanides, sulphides and...
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4684510 |
Method and apparatus for prevention of atmospheric corrosion of electronic equipment
A chemical filter is provided for preventing pollutants in the atmosphere from contaminating sensitive electronic equipment, such as hard disc drives. The chemical filter comprises a layer of...
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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...
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4554139 |
Process for producing and decomposing syngenite
A process for producing K 2 SO 4 from potassium chloride salts, calcium sulfate salts and another sulfate source wherein syngenite is formed and then decomposed with mineral acid to produce...
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4131642 |
Treatment of the waste from the production of tertiary butyl amine to recover sodium sulfate and methyl or sodium formate
Isobutylene, hydrogen cyanide and sulfuric acid are reacted to produce tertiary butyl formamide, which is hydrolyzed by sodium hydroxide to produce tertiary butyl amine. The tertiary butyl amine is...
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4046865 |
Process for producing sodium chloride brines suitable for electrolysis
Contacting rock salt containing at least one member of the group consisting of anhydrite and calcium sulfate as an impurity with an aqueous sodium chloride solution initially containing from about...
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3970528 |
Process for the purification of electrolysis brine
Brine is purified prior to electrolysis by dividing it into two streams, removing sulfate from one of the streams by precipitation with calcium chloride to form calcium sulfate, removing the...
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3873672 |
Desulfurization of gases containing sulfur compounds using alkaline hypochlorite solutions
Gases containing sulfur compounds, especially sulfur dioxide are contacted with a scrubbing solution comprising alkali hypochlorite, which is formed by the electrolysis of alkali chloride, and...
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3840424 |
BELT WITH CAPPED EDGES
A capped edge belt and method for making same for belts that must meet sanitary requirements for the food industry, for belts that must operate in very humid or wet conditions in which the method...
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3653822 |
METHOD OF MANUFACTURING HYDROGEN SULFIDE AND/OR ALKALI METAL SULFATE FROM SMELTS
An alkali metal sulfate and hydrogen sulfide of high purity are obtained by causticizing, treating with sulfuric acid, and neutralizing smelt which is obtained by concentrating and burning Na-base...
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3358740 |
Salt water concentration with alumina-silica additive and separation of sodium sulfate-calcium sulfate double salt
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3257176 |
Process for recovering sulfuric acid and anhydrous sodium sulfate
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3055734 |
Process for separating sea salts
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3005686 |
Sodium sulfite recovery process
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2949342 |
Method of producing sodium and potassium sulphate from pegmatite
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2903336 |
Production of potassium carbonate
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2840455 |
Production of lithium carbonate
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2840453 |
Method of producing lithium
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2816820 |
Recovery of sodium sulfate and hydrochloric acid from acidic sulfate waste materials
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2787528 |
Process for purifying graphite
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0996179 |
Title is not available
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3606466 |
Title is not available
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1597370 |
Title is not available
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