Process for the recovery of manganese

Abstract

The present invention relates to a method for the recovery of manganese from a manganese containing material, the method comprising the steps of: (i) subjecting the manganese containing material to an acid leach step comprising contacting the manganese containing material with an acidic leach solution to produce a leach slurry containing a pregnant leach solution and undissolved solids; (ii) subjecting the pregnant leach solution to a pressure precipitation step, comprising maintaining the pregnant leach solution at elevated temperature and pressure for a time sufficient to precipitate impurities from the pregnant leach solution; (iii) passing the product of step (ii) to a solids/liquid separation step to substantially remove the precipitated impurities and produce a purified pregnant leach solution; and (iv) recovering manganese from the purified pregnant leach solution.

Dependencies are inferred from the claim text.