PROCESSO PER LA SEPARAZIONE DI IMPUREZZE,A BASE DI FERRO,ALLUMINIO E MANGANESE DA SOLUZIONI CLORIDRICHE DI CLORURO DI MAGNESIO

摘要

For separating ferrous, aluminous and manganous contaminations from hydrochloric magnesium chloride solutions the ferrous and aluminous contaminations are precipitated together with optionally present silicic acid and boron compounds at a temperature of 60 to 110 DEG C and a pH-value of 3 to 5.2 by gassing the solution with air and/or oxygen and subsequently the precipitation of manganese is carried out at a pH-value of /4,5, bivalent manganese being oxidised, too. After the precipitation step, the deposit is separated.