METHOD OF EXTRACTING LITHIUM FROM LITHIUM-CONTAINING SOLUTION

The present invention relates to a method for producing lithium hydroxide using lithium carbonate. The method for producing lithium hydroxide using lithium carbonate according to the present invention includes the steps of: extracting lithium carbonate from a lithium-containing solution; dissolving...

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Bibliographische Detailangaben
Hauptverfasser:	KIM KIYOUNG, PARK JAE SIN, CHOI SOO JE, KUK SEUNG TAEK, PARK WOONKYOUNG, KANG HEE SOO, WI JIN YEOP, KIM HYE JEONG, JUNG WOO CHUL
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM INORGANIC CHEMISTRY METALLURGY
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Beschreibung
Zusammenfassung:	The present invention relates to a method for producing lithium hydroxide using lithium carbonate. The method for producing lithium hydroxide using lithium carbonate according to the present invention includes the steps of: extracting lithium carbonate from a lithium-containing solution; dissolving lithium carbonate in acid to obtain a lithium chloride aqueous solution; removing ionic impurities from the lithium chloride aqueous solution; and adding the lithium chloride aqueous solution from which ionic impurities have been removed into a bipolar electrodialysis device to convert the same into a lithium hydroxide aqueous solution and obtain an aqueous acid solution and a salt solution, which are by-products. 본 발명은 탄산리튬을 이용한 수산화리튬의 제조방법에 관한 것이다. 본 발명에 따른 탄산리튬을 이용한 수산화리튬의 제조방법은, 리튬 함유 용액으로부터 탄산 리튬을 추출하는 단계, 탄산 리튬을 산에 용해시켜 염화 리튬 수용액을 수득하는 단계, 염화 리튬 수용액에서 이온 불순물을 제거하는 단계, 및 이온 불순물이 제거된 염화 리튬 수용액을 바이폴라 전기투석장치에 투입하여 수산화 리튬 수용액으로 전환하고 부산물인 산 수용액 및 염용액을 수득하는 단계를 포함한다.