Processes for preparing hydroxides and oxides of various metals and derivatives thereof

Abstract

There are provided processes for preparing a metal hydroxide comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium, copper, magnesium and aluminum, the process comprising: reacting a metal sulfate comprising (i) and optionally (ii) with lithium hydroxide, sodium hydroxide and/or potassium hydroxide and optionally a chelating agent to obtain a solid comprising the metal hydroxide and a liquid comprising lithium sulfate, sodium sulfate and/or potassium sulfate; separating the liquid and the solid from one another to obtain the metal hydroxide; submitting the liquid to an electromembrane process for converting the lithium sulfate, sodium sulfate and/or potassium sulfate into lithium hydroxide, sodium hydroxide and/or potassium hydroxide respectively; reusing the sodium hydroxide for reacting with the metal sulfate; and reusing the lithium hydroxide for reacting with the metal sulfate and/or with the metal hydroxide.

Dependencies are inferred from the claim text.