Process and apparatus for preparing a potassium chloride mixture

Details Process and apparatus for preparing a potassium chloride mixture Process and apparatus for preparing a potassium chloride mixture

1994-06-02

1996-04-02

Straub, Gary P.

Chemistry: physical processes

Physical processes

Crystallization

23297, 23298, 23301, 422902, C01D 324

Patent

active

055036414

ABSTRACT:
A potassium chloride mixture with grains of different sizes is extracted in a first stage with an unsaturated solution at an elevated temperature, whereby the finest grains are completely dissolved and the coarse proportions are caused to start dissolution, the purified medium fraction is transported into a second process stage and the previously dissolved amount of KCl is crystallized there onto the purified grains at a lower temperature, forming a product of high purity with a balanced grain size and a narrow grain spectrum.

REFERENCES:
patent: 681407 (1901-09-01), Coward
patent: 1807263 (1931-05-01), Walter
patent: 2164112 (1939-06-01), Jeremiassen
patent: 2219776 (1940-10-01), Henderson
patent: 3630692 (1971-12-01), Green et al.
patent: 4385902 (1983-05-01), Haugrud
patent: 4997637 (1991-03-01), Tufts
Svanoe, "`Krystal` Classifying crystallizer", Industrial and Engineering Chemistry, vol. 32, No. 5, May 1940, pp. 636-639.
Saeman, "Crystal-size Distribution in Mixed Suspension", A.I.Ch.E Journal, vol. 2, No. 1, Mar. 1956, pp. 107-112.

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