Procedure for obtaining cinc oxide suitable for electrolysis from cinc lejias that also contain cobalt, nickel, calcium and other metal ions. (Machine-translation by Google Translate, not legally binding)

摘要

Process for obtaining zinc oxide suitable for electrolysis from zinc liquors containing also cobalt, nickel, calcium and other metal ions, characterized in that the initial liquor is conditioned, until the concentration of chlorides and calcium are not higher, respectively, to 80 and 50 grams per liter, to then form the ammoniacal complexes of zinc, cobalt, nickel and copper, of which, by addition of complexing agents and oxidants, those of cobalt, nickel and copper are converted into other complexes more stable than ammoniacal, in such a way that the inhibiting action of chlorides on the thermal decomposition of the ammoniacal zinc complex is eliminated, the coprecipitation of calcium is reduced and the resulting zinc oxide is practically free of cobalt, nickel and copper by keeping these dissolved in complex form. (Machine-translation by Google Translate, not legally binding)