Process for removing hexavalent chromium from an aqueous solution of alkali metal chlorate impurity containing hexavalent chromium as an impurity and process for removing and recovering ofCompounds of chromium preicipitado an aqueous solution of alkali metal chlorate containing the same

摘要

A method has been devised for removing hexavalent chromium from concentrated aqueous alkali metal chlorate solution by reacting the solution with an inorganic sulfur containing compound and separating divalent and trivalent chromium compounds from the solution. Alkali metal hypohalites may be simultaneously removed from the chlorate solution by reaction with excess inorganic sulfur containing compound.