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Crystals 2018, 8(1), 19; doi:10.3390/cryst8010019

Removal of SO42− from Li2CO3 by Recrystallization in Na2CO3 Solution

1
College of Chemical Engineering, Sichuan University, Chengdu 610065, China
2
Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
*
Authors to whom correspondence should be addressed.
Received: 4 December 2017 / Revised: 29 December 2017 / Accepted: 3 January 2018 / Published: 5 January 2018
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Abstract

Li2CO3 with high purity is an important raw material for the fabrication of lithium rechargeable batteries. This paper reports a facile recrystallization way to produce Li2CO3 with high purity from commercial Li2CO3 containing 0.8 wt % of SO42− by the treatment of the commercial Li2CO3 in Na2CO3 solution. The increase of temperature from 30 °C to 90 °C favored the recrystallization of Li2CO3 in Na2CO3 solution and promoted the removal of SO42− adsorbed or doped on/in the commercial Li2CO3. The content of SO42− in Li2CO3 decreased to 0.08 wt % after the treatment of the commercial Li2CO3 in 1.0 mol·L−1 Na2CO3 solution at 90 °C for 10.0 h. View Full-Text
Keywords: Lithium carbonate; sulfate; recrystallization; sodium carbonate Lithium carbonate; sulfate; recrystallization; sodium carbonate
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Cai, W.; Chen, R.; Yang, Y.; Yi, M.; Xiang, L. Removal of SO42− from Li2CO3 by Recrystallization in Na2CO3 Solution. Crystals 2018, 8, 19.

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