Method of reducing the sodium sulfate content of halite

Details Method of reducing the sodium sulfate content of halite Method of reducing the sodium sulfate content of halite

1977-08-12

1978-06-13

Stern, Edward

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423184, 423499, 423551, C01D 304, C01D 314, C01D 500

Patent

active

040949567

ABSTRACT:
The content of sodium sulfate (and less soluble sulfates) in rock salt (halite) can economically be reduced from levels as high as 5 weight percent to levels as low as about 0.1 weight percent by the process of the invention. The halite is crushed to a certain particle size range and particles less than 0.5 mm in effective diameter are removed while (or after) the crushed material is subjected to attrition washing with a low sulfate, high NaCl brine. The washed, coarse particles are rinsed with a low sulfate brine, drained and dried to an extent appropriate to their contemplated use.

REFERENCES:
patent: 1909606 (1933-05-01), Berliner
patent: 3712797 (1973-01-01), Winkler
patent: 3832446 (1974-08-01), Mitchell et al.
Chem. Abstracts, vol. 79, 1973, p. 137, 55544S.
Turk, L., Ph.D. Thesis, Stanford Univ., 1969, pp. 204-206, Hydrology of the Bonneville Salt Flats, Utah.
Sarig et al. Purification of Alkali Halides by Means of Fractional Crystallization from Aqueous Solutions; Chem. Abs. 78, 142068v.

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