Process for the production of potassium chloride and magnesium c

Details Process for the production of potassium chloride and magnesium c Process for the production of potassium chloride and magnesium c

1977-10-20

1979-02-20

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423179, 423203, C01D 308, C01F 530

Patent

active

041407474

ABSTRACT:
The present invention relates to a process for the production of potassium chloride and of magnesium chloride hexahydrate (bischoffite) from carnallite or from carnallite containing sodium chloride.
The process comprises heating carnallite at a temperature of between above 70.degree. C. and above 167.5.degree. C. in the presence of added water at the above former temperature or without added water (but preventing evaporation of water) at the above latter temperature. Solid potassium chloride is then separated. In the residual brine, carnallite is precipitated by evaporation or by lowering the temperature, and it is recycled to the starting stage. The residual solution consists essentially of magnesium chloride which is recovered as bischoffite.

REFERENCES:
patent: 1304097 (1919-05-01), Reeve
patent: 1757592 (1930-06-01), Schleicher
patent: 2479001 (1949-08-01), Burke et al.
patent: 2758912 (1956-08-01), Dancy
patent: 3498744 (1970-03-01), Frint et al.
patent: 3498745 (1970-03-01), Nylander
patent: 3644102 (1972-02-01), Svanoe
patent: 3852044 (1974-12-01), Neitzel et al.
patent: 3967930 (1976-07-01), Sadan
patent: 4039617 (1977-08-01), Kuo

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