Process for recovery of potassium from manganate plant wastes

摘要

Potassium is recovered as a dilute KOH solution from residue solids resulting from conversion of manganese ore to K2MnO4 by reacting the solids with a Ca(OH)2 under specified conditions. The resulting KOH solution can be returned to the K2MnO4 plant and the solids of reduced potassium content are suitable for disposal in a landfill.