Occidental Chemical Corporation

Hooker Chemicals & Plastics Corporation

Lewis E Tufts

Bernardus Johannes Mentz

Disclosed is a method of reducing the sodium chloride content of potassium chloride by forming an aqueous slurry of potassium chloride feed crystals having a wide particle size distribution with an average diameter of about 0.1 to about 50 microns in a liquor saturated with potassium chloride and undersaturated with sodium chloride, which is at least 50% saturated with sodium chloride, whereby the smaller of the feed crystals dissolve and potassium chloride grows on the larger of the feed crystals to form product crystals removing the product crystals from the slurry. Also disclosed is an apparatus for carrying out this process.

Digestive crystallizing process and apparatus for purification of KC1

A method of operating a plurality of electrolytic diaphragm cells utilizing interruptable or off-peak electrical power varying from a higher electrical load level to a lesser electrical load level and subsequently returning to a selected higher electrical load level is described, which comprises the steps of:

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Lewiston, NY, United States of America

Lewis E Tufts