Nittetsu Mining Co., Ltd.

Sumitomo Corporation

Toyo Engineering Corporation

Ryo Kawarabuki

Kohei Mitsuhashi

Masanobu Kawata

Yutaka Yamaguchi

Atsushi Moriya

Norifumi Sakai

Yuji Tanimura

Hirohumi Tanaka

Youichi Yamamoto

Keita Kamiyama

The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.

Method for producing lithium carbonate

The present invention relates to a method for producing lithium carbonate, the method including: mixing ammonia and carbon dioxide gas (carbonate gas) with an aqueous solution containing lithium chloride to conduct a carbonation reaction; and thereafter, recovering a produced solid by solid-liquid separation, and also relates to a method for producing high purity lithium carbonate.

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Tokyo, Japan

Ryo Kawarabuki