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Preparation of Li 2 CO 3 by gas‐liquid reactive crystallization of LiOH and CO 2
Author(s) -
Sun Yuzhu,
Song Xingfu,
Wang Jin,
Yu Jianguo
Publication year - 2012
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201100571
Subject(s) - slurry , particle size , volumetric flow rate , crystallization , analytical chemistry (journal) , chemistry , volume (thermodynamics) , particle (ecology) , spinning , chemical engineering , materials science , thermodynamics , chromatography , organic chemistry , polymer chemistry , composite material , physics , oceanography , engineering , geology
A spinning disk reactor (SDR) was used in this research to prepare Li 2 CO 3 by gas‐liquid reactive crystallization of LiOH and CO 2 . It was found that the end pH value of the above reaction should be controlled within the range of 9.0‐9.5 to obtain a high yield of Li 2 CO 3 . The effects of operational parameters (including the temperature, the concentration of LiOH solution, the rotation rate of the spinning disk, the circulation rate of LiOH slurry, the flow rate of CO 2 and the ultrasound field) on the particle size and the yielding rate were investigated by an orthogonal experiment. The results show the significant factors influencing the particle size are the ultrasound field, the temperature and the flow rate of CO 2 . As for the yielding rate, the temperature, the concentration of LiOH solution and the flow rate of CO 2 exert obvious impacts, while the effects of ultrasound field and the rotation rate of the spinning disk are limited. The SEM images show the Li 2 CO 3 products are flower‐like particles, which are composed of plate‐like primary crystals. The size analysis shows the volume mean particle size of the Li 2 CO 3 products ranges 37‐90 μm depending on the various experimental conditions. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)