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

Abstract

A process for process for preparing a metal hydroxide comprising at least one metal chosen from nickel, cobalt, manganese, lithium and aluminum. The process comprises: reacting a metal sulfate and/or a metal nitrate comprising at least one metal chosen from nickel, cobalt, manganese, lithium and aluminum with a base chosen from LiOH, NaOH, KOH, RbOH, CsOH, Mg(OH)2, Ca(OH)2, Sr(OH)2, or Ba(OH)2 and optionally a chelating agent in order to obtain a solid comprising the metal hydroxide and a liquid comprising at least one of Li2SO4 Na2SO4, K2SO4, Rb2SO4, Cs2SO4, MgSO4, CaSO4, SrSO4, BaSO4, LiNO3 NaNO3, KNO3, RbNO3, CsNO3, Mg(NO3)2, Ca(NO3)2, Sr(NO3)2 and Ba(NO3)2, separating the liquid and the solid from one another to obtain the metal hydroxide; submitting the liquid comprising at least one of Li2SO4 Na2SO4, K2SO4, Rb2SO4, Cs2SO4, MgSO4, CaSO4, SrSO4, BaSO4, LiNO3 NaNO3, KNO3, RbNO3, CsNO3, MgNO3, CaNO3, SrNO3 and BaNO3 to an electromembrane process for converting the least one of Li2SO4, Na2SO4, K2SO4, Rb2SO4, Cs2SO4, MgSO4, CaSO4, SrSO4, BaSO4, LiNO3 NaNO3, K2NO3, RbNO3, CsNO3, Mg(NO3)2, Ca(NO3)2, Sr(NO3)2 and Ba(NO3)2 into at least one of LiOH, NaOH, KOH, RbOH, CsOH, Mg(OH)2, Ca(OH)2, Sr(OH)2, and Ba(OH)2; and reusing the at least one of LiOH, NaOH, KOH, RbOH, CsOH, Mg(OH)2, Ca(OH)2, Sr(OH)2, and Ba(OH)2 obtained by the electromembrane process for reacting with the metal sulfate and/or the metal nitrate.

Dependencies are inferred from the claim text.