Method for producing lithium carbonate
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United States of America Patent
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Feb 9, 2016
Grant Date -
Sep 26, 2013
app pub date -
Nov 29, 2012
filing date -
Mar 22, 2012
priority date (Note) -
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Abstract
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.
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