Method for producing sodium chloride crystals

Details Method for producing sodium chloride crystals Method for producing sodium chloride crystals

C - Chemistry, Metallurgy

01

D

C01D 3/16 (2006.01) B01D 53/68 (2006.01) C01F 11/46 (2006.01)

Patent

CA 2341569

The invention concerns a method for producing sodium chloride crystals starting with sodium chloride brine contaminated with potassium chloride and sulphate ions, which consists in: adding a calcium compound (32) to the brine (48) to crystallise the glauberite (35) which is eliminated; subjecting the resulting aqueous solution (40) which is collected and subjecting the mother liquor (41) of the sodium chloride crystallisation to a cooling process (42) to crystallise the glaserite (45).

Procédé pour la production de cristaux de chlorure de sodium au départ d'une saumure de chlorure de sodium contaminée par du chlorure de potassium et des ions sulfate, selon lequel on additionne un composé du calcium (32) à la saumure (48) pour cristalliser de la glaubérite (35) que l'on écarte, on soumet la solution aqueuse résultante (36) à une évaporation pour crisalliser du chlorure de sodium (40) que l'on recueille et on soumet l'eau mère (41) de la cristallisation du chlorure de sodium à un refroidissement (42) pour cristalliser de la glasérite (45).

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