METHOD OF PREPARING POTASSIUM CHLORIDE
FIELD: recovery of potassium chloride from sylvinite ores. SUBSTANCE: method comprises dissolving sylvinites, crystallizing the desired product from solution in multistep vacuum crystallizers, classifying solid phase, washing thereof, drying, removing dust, dissolving fine crystalline and dust fract...
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| creator | POLIKSHA A.M GUROV V.M SAFRYGIN JU.S BUKSHA JU.V PASKINA A.V FEDOROV G.G TIMOFEEV V.I GORODETSKIJ V.I CHISTJAKOV A.A SHANIN V.P |
| description | FIELD: recovery of potassium chloride from sylvinite ores. SUBSTANCE: method comprises dissolving sylvinites, crystallizing the desired product from solution in multistep vacuum crystallizers, classifying solid phase, washing thereof, drying, removing dust, dissolving fine crystalline and dust fractions and recycling the solution to process. Course potassium chloride fractions obtained by hydroclassification of crystallizate suspension are filtered, and fine fractions are directed to controllable vacuum crystallization devices. Fine crystalline potassium chloride resulting from drying and dust removal stages is directed in suspension from into first body of controllable vacuum crystallization device at S:L ratio of 1.0-5.0 and temperature of 70-95. From controllable vacuum crystallization device, condensate is directed to outer compartments of devices. EFFECT: simplified method and higher purity of potassium chloride. 1 ex |
| format | Patent |
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SUBSTANCE: method comprises dissolving sylvinites, crystallizing the desired product from solution in multistep vacuum crystallizers, classifying solid phase, washing thereof, drying, removing dust, dissolving fine crystalline and dust fractions and recycling the solution to process. Course potassium chloride fractions obtained by hydroclassification of crystallizate suspension are filtered, and fine fractions are directed to controllable vacuum crystallization devices. Fine crystalline potassium chloride resulting from drying and dust removal stages is directed in suspension from into first body of controllable vacuum crystallization device at S:L ratio of 1.0-5.0 and temperature of 70-95. From controllable vacuum crystallization device, condensate is directed to outer compartments of devices. 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SUBSTANCE: method comprises dissolving sylvinites, crystallizing the desired product from solution in multistep vacuum crystallizers, classifying solid phase, washing thereof, drying, removing dust, dissolving fine crystalline and dust fractions and recycling the solution to process. Course potassium chloride fractions obtained by hydroclassification of crystallizate suspension are filtered, and fine fractions are directed to controllable vacuum crystallization devices. Fine crystalline potassium chloride resulting from drying and dust removal stages is directed in suspension from into first body of controllable vacuum crystallization device at S:L ratio of 1.0-5.0 and temperature of 70-95. From controllable vacuum crystallization device, condensate is directed to outer compartments of devices. EFFECT: simplified method and higher purity of potassium chloride. 1 ex</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM INORGANIC CHEMISTRY METALLURGY |
| title | METHOD OF PREPARING POTASSIUM CHLORIDE |
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