TY - JOUR
T1 - Purification of lithium carbonate from sulphate solutions through hydrogenation using the Dowex G26 resin
AU - Chen, Wei Sheng
AU - Lee, Cheng Han
AU - Ho, Hsing Jung
N1 - Funding Information:
This research was funded by NCKU Research & Development Foundation (106S281). We are pleased to acknowledge the support of the Laboratory of Resources Circulation (LRC) at National Cheng Kung University
Funding Information:
This study proposed a hydrometallurgical way to recover lithium carbonate, effectively, from the sulphate solutions. Calcium and sodium could be separated, effectively, with pH 7 and a 4 min the sulphate solutions. Calcium and sodium could be separated, effectively, with pH 7 and a 4 min reaction time in the ion-exchange step. In the hydrogenation–decomposition procedure, yields were reaction time in the ion-exchange step. In the ◦ hydrogenation–decomposition procedure◦ , yields were the highest with 1.75 L of CO2 aeration, 27.5 C of hydrogenation temperature, and 1 C of the heating the highest with 1.75 L of CO2 aerati◦on, 27.5 °C of hydrogenation temperature, and 1 °C of the heating rate; purity was highest with a 0.5 C heating rate, with the Dowex G26 resin. With these conditions, rate; purity was highest with a 0.5 °C heating rate, with the Dowex G26 resin. With these condi◦ tions, the lithium carbonate product could be acquired by the drying treatment, at 90 C and its purity and the lithium carbonate product could be acquired by the drying treatment, at 90 °C and its purity and recovery rate were almost 99.9% and 87.6%. In comparison with other methods, this method produced recovery rate were almost 99.9% and 87.6%. In comparison with other methods, this method less waste and energy consumption, less use of chemicals, and could efficiently purify the lithium produced less waste and energy consumption, less use of chemicals, and could efficiently purify the carbonatelithium carbonafrom thete frsulphateom the sulsolutions.phate solutions. lithium carbonate from the sulphate solutions. AAuutthhoorr CCoonnttrriibbuuttiioonnss:: SSuuppeerrvviissiioonn,, WW..--SS..CC.. aanndd HH..--JJ..HH..;; WWrriittiinngg––oorriiggiinnaall ddrraafftt,, CC..--HH..LL..;; WWrriittiinngg––rreevviieeww && editing, C.-H.L. and H.-J.H. editing, C.-H.L. and H.-J.H. Funding: This research was funded by NCKU Research & Development Foundation (106S281). Funding: This research was funded by NCKU Research & Development Foundation (106S281). Acknowledgments: We are pleased to acknowledge the support of the Laboratory of Resources Circulation (LRC) Acknowledgments: We are pleased to acknowledge the support of the Laboratory of Resources Circulation AatcNknatoiwonlaeldCgmheenngtsK: uWneg Uarnei vpelresaistey.d to acknowledge the support of the Laboratory of Resources Circulation (LRC) at National Cheng Kung University. (LRC) at NatConflicts of Interest:ional Cheng Kung UniversityThe authors declare no. conflict of interest. Conflicts of Interest: The authors declare no conflict of interest. Conflicts of Interest: The authors declare no conflict of interest. References
Publisher Copyright:
© 2018 by the authors.
PY - 2018/11/15
Y1 - 2018/11/15
N2 - Purification of lithium carbonate, in the battery industry, is an important step in the future. In this experiment, the waste lithium-ion batteries were crushed, sieved, leached with sulfuric acid, eluted with an extractant, and finally sulphate solutions were extracted, through selective precipitation. Next, sodium carbonate was first added to the sulphate solutions, to precipitate lithium carbonate (Li2CO3). After that, lithium carbonate was put into the water to create lithium carbonate slurry and CO2 was added to it. The aeration of CO2 and the hydrogenation temperature were controlled, in this experiment. Subsequently, Dowex G26 resin was used to remove impurities, such as the calcium and sodium in lithium carbonate. Moreover, the adsorption isotherms, described by means of the Langmuir and Freundlich isotherms, were used to investigate the ion-exchange behaviors of impurities. After removing the impurities, the different heating rate was controlled to obtain lithium carbonate. In a nutshell, this study showed the optimum condition of CO2 aeration, hydrogenation temperature, ion-exchange resin and the heating rate to get high yields and purity of lithium carbonate.
AB - Purification of lithium carbonate, in the battery industry, is an important step in the future. In this experiment, the waste lithium-ion batteries were crushed, sieved, leached with sulfuric acid, eluted with an extractant, and finally sulphate solutions were extracted, through selective precipitation. Next, sodium carbonate was first added to the sulphate solutions, to precipitate lithium carbonate (Li2CO3). After that, lithium carbonate was put into the water to create lithium carbonate slurry and CO2 was added to it. The aeration of CO2 and the hydrogenation temperature were controlled, in this experiment. Subsequently, Dowex G26 resin was used to remove impurities, such as the calcium and sodium in lithium carbonate. Moreover, the adsorption isotherms, described by means of the Langmuir and Freundlich isotherms, were used to investigate the ion-exchange behaviors of impurities. After removing the impurities, the different heating rate was controlled to obtain lithium carbonate. In a nutshell, this study showed the optimum condition of CO2 aeration, hydrogenation temperature, ion-exchange resin and the heating rate to get high yields and purity of lithium carbonate.
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U2 - 10.3390/app8112252
DO - 10.3390/app8112252
M3 - Article
AN - SCOPUS:85056592509
SN - 2076-3417
VL - 8
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
IS - 11
M1 - 2252
ER -