HIGH PURITY LITHIUM CARBONATE AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2010/131664

A1

Disclosed is a high purity lithium carbonate (A) which is obtained from a crude lithium carbonate (a) and has a Ca content of not more than 5 ppm and an Mg content of not more than 4 ppm. The high purity lithium carbonate can be obtained through a first step in which an aqueous lithium hydrogen carbonate solution is obtained by introducing carbon dioxide into an aqueous slurry that contains the crude lithium carbonate (a), a second step in which the pH of the aqueous lithium hydrogen carbonate solution is adjusted to 8.0 or more by addition of an alkaline compound, and then a chelating agent is added into the resulting solution, and a third step in which the aqueous lithium hydrogen carbonate solution obtained by the second step is heated so as to obtain an aqueous solution containing the lithium carbonate (A), and then the lithium carbonate (A) is obtained by solid-liquid separation.

JP2022036933	PROCESSES FOR PREPARING HIGHLY PURE LITHIUM CARBONATE AND OTHER HIGHLY PURE LITHIUM-CONTAINING COMPOUNDS
JP7101995	Lithium recovery method
JPS602086	[Title of the Invention] A removing method of carbon dioxide

KIKUCHI TSUTOMU (JP)

PCT/JP2010/057992

November 18, 2010

May 12, 2010

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NIPPON CHEMICAL IND (JP)
KIKUCHI TSUTOMU (JP)

C01D15/08

JP2009057278A	2009-03-19
JP2009046390A	2009-03-05
JP2004196606A	2004-07-15
JP2004196607A	2004-07-15
JPH1131041A	1999-02-02
JP2002505248A	2002-02-19

NIPPON CHEMICAL INDUSTRIAL CO., LTD. (JP)
Nippon Chemical Industrial Co., Ltd. (JP)

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