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Coupled reaction and solvent extraction process to form Li 2 CO 3 : Mechanism and product characterization
Author(s) -
Zhou Zhiyong,
Liang Fan,
Qin Wei,
Fei Weiyang
Publication year - 2014
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14243
Subject(s) - particle size , solvent , aqueous solution , particle size distribution , particle (ecology) , chemistry , extraction (chemistry) , pulmonary surfactant , phase (matter) , surface area to volume ratio , chemical engineering , analytical chemistry (journal) , materials science , chromatography , organic chemistry , biochemistry , oceanography , engineering , geology
A coupled reaction and solvent extraction process to produce Li 2 CO 3 from LiCl and CO 2 is proposed. The aqueous reaction occurs with difficulty and is not spontaneous at 298 K. To ensure the continuous reaction between LiCl and CO 2 to produce Li 2 CO 3 , it is necessary to remove HCl. Experiments conducted in an open reactor at room‐temperature showed that the product sample was pure Li 2 CO 3 with a particle‐size distribution in two regions and a larger number of small crystals. The large and small crystals were obtained by radial growth in the free aqueous phase and in water‐in‐oil structures with growth space constraints, respectively. Factors influencing the particle‐size distribution and Li 2 CO 3 morphology were investigated. A short reaction time, large phase ratio (O/A), low–temperature, and surfactant addition (TritonX‐100) can increase the number of small particle crystals and reduce the number and volume of large particle crystals. © 2013 American Institute of Chemical Engineers AIChE J , 60: 282–288, 2014