Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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A study on the reaction of carbonation in the preparation of lithium carbonate powders

탄산리튬 분말 제조에 있어서 탄산화 반응에 관한 연구

  • Yang, Jae-Kyo (Advanced Materials and Processing Center, Institute for Advanced Engineering (IAE)) ;
  • Jin, Yun-Ho (Advanced Materials and Processing Center, Institute for Advanced Engineering (IAE)) ;
  • Yang, Dae-Hoon (GM-Tech) ;
  • Kim, Dae-Weon (Advanced Materials and Processing Center, Institute for Advanced Engineering (IAE))
  • 양재교 (고등기술연구원 신소재공정센터) ;
  • 진연호 (고등기술연구원 신소재공정센터) ;
  • 양대훈 ((주)지엠텍) ;
  • 김대원 (고등기술연구원 신소재공정센터)
  • Received : 2019.09.30
  • Accepted : 2019.10.11
  • Published : 2019.10.31
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Abstract

In this study, we carried out the experiment to prepare lithium carbonate powder through gas-liquid reactions with a lithium-containing solution and $CO_2$ gas using lithium hydroxide, lithium chloride, and lithium sulfate. Thermodynamically, the carbonation reaction of a lithium-containing solution showed that aqueous reaction of lithium hydroxide occurs spontaneously, but aqueous reactions of lithium chloride and lithium sulfate does not occur spontaneously. In the case of lithium hydroxide solution, the recovery rate of lithium carbonate was 69.8 % at room temperature ($25^{\circ}C$), and increased to 89.4 % at $60^{\circ}C$. In the case of lithium chloride and lithium sulfate solution, lithium carbonate could be prepared using sodium hydroxide as an additive, but the recovery rates were 19.2 % and 16.7 %, respectively.

본 연구는 수산화리튬, 염화리튬, 그리고 황산리튬을 이용한 리튬 함유 용액과 $CO_2$ 가스와의 기상-액상 반응을 통하여 탄산리튬 분말을 제조하는 실험을 실시하였다. 열역학적으로 리튬 함유 용액의 탄산화 반응에서 수산화리튬은 자발적으로 일어나지만, 염화리튬과 황산리튬은 비자발적이었다. 수산화리튬의 경우, $25^{\circ}C$의 반응온도에서 탄산리튬의 회수율이 69.8 %였으며, $60^{\circ}C$에서는 89.4 %로 증가하였다. 염화리튬과 황산리튬의 경우, 수산화나트륨을 첨가제로 사용하여 탄산리튬을 제조할 수 있었으나, 회수율은 각각 19.2 %와 16.7 %로 비효율적임을 알 수 있었다.

Keywords

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