Method for preparing lithium hydroxide from lithium carbonate

Abstract

The invention relates to a method for preparing lithium hydroxide from lithium carbonate. The method for preparing lithium hydroxide from lithium carbonate according to the present invention comprises the steps of: extracting lithium carbonate from a lithium-containing solution; a step of dissolving the lithium carbonate in an acid to obtain a lithium chloride aqueous solution; a step for removing ionic impurities from the aqueous lithium chloride solution; and putting the lithium chloride aqueous solution from which the ion impurities are removed into a bipolar electrodialysis device, converting the lithium chloride aqueous solution into a lithium hydroxide aqueous solution, and obtaining by-products, namely an acid aqueous solution and a salt solution.

Images