Process for the production of highly concentrated magnesium chlo

Details Process for the production of highly concentrated magnesium chlo Process for the production of highly concentrated magnesium chlo

1977-03-29

1978-09-26

Stern, Edward

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423499, 423555, C01F 530, C01D 306, C01F 1146

Patent

active

041170784

ABSTRACT:
Concentrated magnesium chloride solutions are prepared from industrial liquors or brines by debrominating the liquor with chlorine, neutralizing the debrominated liquor up to a ph value of 3-6, adding a stoichiometric excess of calcium chloride to the neutralized liquor at temperatures in the range of 30.degree.-50.degree. C to form a calcium sulfate dehydrate crystallizate, separating the crystallizate from the mother liquor, adding a sufficient amount of carnallite to the mother liquor to increase the MgCl.sub.2 content thereof to 270-330 g/l after cold decomposition of the added carnallite and concentrating the resulting solution in two or more steps in the direct current in an evaporator with crystallization characteristics up to a final concentration of 440 to 470 g/l MgCl.sub.2 whereafter the concentrated magnesium chloride solution is separated from crude crystallized carnallite and sodium chloride formed during the concentration.

REFERENCES:
patent: 1801661 (1931-04-01), Collings
patent: 1875070 (1932-08-01), Martin
patent: 2479001 (1949-08-01), Burke et al.
patent: 2759794 (1956-08-01), Fuchsman
patent: 3729550 (1973-04-01), Boyum et al.

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