Method and apparatus for treatment of a potassium chloride...

Details Method and apparatus for treatment of a potassium chloride... Method and apparatus for treatment of a potassium chloride...

C - Chemistry, Metallurgy

01

D

C01D 3/14 (2006.01) B01D 9/00 (2006.01)

Patent

CA 2125005

A mixture of potassium chloride having grains of various sizes is leached in a first stage at elevated temperature using an unsaturated solution; the extremelyfine fractions are completely dissolved and the coarse fractions are partially dissolved; in a second process stage the purified mean fraction is transported and the previously dissolved quantity of KCI is crystallized at low temperature onto the purified grains, so that a high-purity product with a narrow grain spectrum, and with uniform purity with respect to the grain size, is obtained.

Un mélange de chlorure de potassium à grains de taille variée est lixivié dans une première étape à température élevée, à l'aide d'une solution insaturée; les fractions extrêmement fines sont complètement dissoutes et les fractions grossières partiellement; dans une seconde étape, la fraction moyenne purifiée est transférée et la quantité précédemment dissoute de KCI est cristallisée à basse température sur les grains purifiés, de façon à obtenir un produit très pur, avec un spectre étroit de granulométrie, et une pureté uniforme eu égard à la taille des grains.

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