Process for the purification of alkali metal chloride brines

摘要

Cationic contaminants are removed from an alkali metal chloride brine in a process which comprises contacting the brine with solid particles of a magnesium-containing silicate having a mole ratio of silicon to magnesium of at least about 1:1. The cationic contaminants in the brine adhere to the magnesium-containing silicate particles and the concentration of the cationic contaminants are thereby reduced. A purified brine is obtained by removing the magnesium-containing silicate having cationic contaminants adhering thereto. Elements of Groups VIII, IV, and II can readily be removed from brines used in electrolytic processes such as the production of chlorine and alkali metal hydroxides or alkali metal chlorates.