The International Nickel Company, Inc.

Bernardus Jacobus Brandt

Alexander Illis

Gyula John Borbely

The presence of one or more of cobalt, iron, arsenic and lead is most substantially reduced in a nickel-containing electrolyte by an electrochemical process utilizing a high current density at the cathode in an electrolytic cell containing specific quantities of chlorides of alkali metals to form a fine nickel hydroxide precipitate. In a subsequent time dependent reaction under controlled pH conditions, nickel hydroxide reacts with the electrolyte to form insoluble precipitates of cobalt, iron, arsenic and lead which are removed from the electrolyte by filtration.

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Port Colborne, Canada

Bernardus Jacobus Brandt