| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a separation concentrating method of Ga and In in a soln. capable of efficiently recovering Ga and In from a soln. contg. trace amounts of Ga and In at a low cost. SOLUTION: As a soln. contg. trace amounts of Ga and In, a soln. obtd. by two step neutralizing treatment in a zinc leaching residue treating stage of zinc refining is used, this soln. is heated to 70 to 150 deg.C soln. temp. while being violently stirred under the control of pH to 2 to 4 by using mineral acid or an alkali agent in the presence of iron (I, II) ions, sulfuric acid ions and univalent cations and is brought into reaction for 2 to 24 hr to produce jarosite, Ga and In are coprecipitated together with jarosite grains, and solid-liq. separation is executed therein to recover jarosite contg. Ga and In.</p> |
