Selective extraction method of thorium using polymer alcohol and making method of thorium oxide ther

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In a method for selectively extracting thorium from a rare earth light leaching residue, the present invention provides the method for selectively extracting thorium using polymer alcohol, comprising following steps of : (a) adding an acid solution to the leaching residue, adding hydrogen peroxide and the polymer alcohol as a reducing agent to form infusion liquid; and (b) adding an organic phase containing an extractant to a leaching solution to extract thorium as a solvent. Therefore, it is possible to reduce an amount of the reducing agent used to reduce a load of a thorium extraction process.(AA) Start(BB) End(S100) Adding an acid solution to the leaching residue and adding hydrogen peroxide and the polymer alcohol as a reducing agent to form infusion liquid(S200) Adding an organic phase containing an extractant to a leaching solution to extract thorium as a solventCOPYRIGHT KIPO 2019