首页|Process intensification for the synthesis and purification of battery-grade Li2CO3 with microfluidics

Process intensification for the synthesis and purification of battery-grade Li2CO3 with microfluidics

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Battery-grade lithium carbonate(Li2CO3)with a purity of higher than 99.5 wt％is of great importance as a high value-added lithium salt.However,influences of different reaction systems and process control on product purity remain unclear.Herein,a membrane dispersion microreactor was used to enhance the mass transfer of preparation and purification processes in homogeneous and heterogeneous system.Synthetic systems of Na2CO3-LiCl,NH4HCO3-LiCl,and NH3 H2O-CO2-LiCl,CO2 purification based on carbonation and decomposition were adopted.The Li2CO3 purity was increased by the improvement of mixing performance.The carbonation time was reduced by 62.5％and 58.3％for the NH3·H2O-CO2 and CO2 purification systems,respectively.In the two ammonia-based systems,Li2CO3 particles with a purity of 99.7-99.8 wt％were one-step prepared with a size of 3-5 μm,which also met the requirement of the battery-grade standard.The purity was further increased to 99.9 wt％by CO2 purification and LiHCO3 decomposition.The investigation could provide a feasible alternative for the controllable preparation of battery-grade Li2CO3 in one or multiple steps.

MicrofluidicsBattery gradeLi2CO3Process intensificationHigh purity

Haodu Li、Jie Zhang、Lin Dai、Le Du、Jiqin Zhu

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The State Key Laboratory of Chemical Resource Engineering,College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInnovation Fund of SINOPEC Catalyst Co.Ltd-State Key Laboratory of Chemical Resource Engineering

2227801422278015219780082160600836100000-22-ZC0607-0041

2024

10.1016/j.partic.2023.12.001

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2024.90(7)
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