The Anaconda Company

William Richard Stern

Robert E Sullivan

Bess L Vance

The invention provides a process for recovering gallium from calcined clay leached with hydrochloric acid. The leach solution containing aluminum, ferric and gallium chlorides is treated by ion exchange to first remove aluminum ions, following which the solution containing ferric and gallium chlorides is treated to reduce the ferric ions to ferrous ions. The reduced solution is acidified with hydrochloric acid sufficiently to insure that the gallium is present in the form GaCl.sub.4 - ions, and is then again treated by ion exchange to separate the ferrous ions from the gallium for ultimate recovery of the latter.

Process for recovering gallium

The method of recovering copper by cementation using copper-iron materials as part of the cementation scrap, the copper and iron in said materials being substantially physically inseparable.

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Tuscon, AZ, United States of America

William Richard Stern