Method of solution mining potassium chloride from subterranean d

Details Method of solution mining potassium chloride from subterranean d Method of solution mining potassium chloride from subterranean d

1971-09-03

1976-11-30

Emery, Stephen J.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

23297, 23298, 23300, 23302R, 423184, 423208, 423499, B01D 902, B01D 1104, C01D 308, C01D 316

Patent

active

039945316

ABSTRACT:
The present invention relates to an improved method of solution mining potassium chloride from subterranean ore deposits containing both potassium chloride and sodium chloride. By the present invention, an aqueous medium is passed through the ore deposits so that potassium chloride and sodium chloride are dissolved therein. Magnesium chloride is combined with the aqueous brine solution formed so that an aqueous brine solution containing potassium chloride, sodium chloride and magnesium chloride in specific proportions is produced, and the solubility of potassium chloride in the solution is reduced. The combined aqueous brine solution is then concentrated so that it is substantially saturated with potassium chloride, and the concentrated solution is cooled to cause the precipitation of substantially pure potassium chloride. Advantageously, the magnesium chloride combined with the aqueous brine solution is obtained by solution mining a second subterranean ore deposit containing magnesium chloride and combining the brine solutions formed.

REFERENCES:
patent: 1215546 (1917-02-01), Jones
patent: 1353283 (1920-09-01), Lilsbee
patent: 1432796 (1972-10-01), Lilsbee
patent: 1878586 (1932-09-01), Kipper
patent: 2161800 (1939-06-01), Cross
patent: 3355212 (1967-11-01), Day
patent: 3440023 (1969-04-01), Hoppe
patent: 3642454 (1972-02-01), Nylander

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