PROCESS FOR RECYCLING ALUMINUM HYDROXIDE FROM A BLACK MASS

Abstract

Disclosed herein is a process for recycling aluminum hydroxide from a black mass including aluminum, the process including in the given order the steps of leaching in a first leaching step the black mass in an aqueous acid solution; separating the first leaching residue from the first leaching solution; adding in a pH-adjusting step a first aqueous base solution to the first leaching solution; precipitating an Al/Fe precipitate from the first pH-adjusted leaching solution; separating the Al/Fe precipitate from the first pH-adjusted leaching solution; leaching the Al/Fe precipitate in a second aqueous base solution; separating the second leaching residue from the second leaching solution; precipitating in an Al precipitation step an Al precipitate from the second leaching solution; and separating the Al precipitate from the second leaching solution.

CPC Classifications