Process for the production of coarse K.sub.2 SO.sub.4 in crystal

Details Process for the production of coarse K.sub.2 SO.sub.4 in crystal Process for the production of coarse K.sub.2 SO.sub.4 in crystal

1977-06-08

1979-11-13

Vertiz, O. R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

23302T, 422252, C01D 500, C01D 1506, C01D 1700

Patent

active

041743822

ABSTRACT:
A process for selectively recovering coarse crystalline K.sub.2 SO.sub.4 from a crystallizer is disclosed. A classifier comprising an elongated cylindrical vessel which is located separate from the crystallizer is employed in the process. Crystallization is effected in the crystallizer and supernatant liquor recovered as overflow during crystallization is passed from the crystallizer into the lower portion of the elongated cylindrical vessel. Slurry is recovered from the bottom of the crystallizer and introduced into a middle portion of the elongated cylindrical vessel. Coarse crystalline K.sub.2 SO.sub.4 falls to the bottom of the elongated cylindrical vessel and is recovered therefrom. Fine crystalline K.sub.2 SO.sub.4 is entrained in the upwardly flowing liquor and passed upwardly therewith. The upwardly flowing liquor and fine crystalline K.sub.2 SO.sub.4 are withdrawn from the top of the elongated cylindrical vessel and recycled to the crystallizer.

REFERENCES:
patent: 1932674 (1933-10-01), Pyzel
patent: 2025756 (1935-12-01), Larsson
patent: 3425795 (1969-02-01), Howard
patent: 3967930 (1976-07-01), Sadan
Garrett, D. E. Applications, Industrial & Engineering Chemistry, vol. 53, #8, Aug. 1961, pp. 623-628.
Saeman, W. C., Design Industrial & Engineering Chemistry, vol. 53, #8, Aug. 1961, pp. 612-622.

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