Modified Carbon Sorbents for Extraction of Sodium and Calcium Admixtures from the Solutions of Lithium Chloride
L. M. LEVCHENKO1, E. P. MURATOV2, A. B. ALEKSANDROV2, V. I. STEPANOV2, A. G. LYAKH2, V. N. MITKIN1 and B. M. SHAVINSKY1
1 Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences,
Prospekt Akademika Lavrentyeva 3, Novosibirsk 630090 (Russia)
luda@niic.nsc.ru
2 Novosibirsk Chemical Concentrates Plant,
Ul. B. Khmelnitskogo 94, Novosibirsk 630110 (Russia)
Keywords: carbon sorbents modified with antimony (V) compounds, sorption of sodium and calcium, lithium chloride solution
Pages: 77–81
Abstract
Methods of obtaining carbon sorbents modified with the compounds of antimony (V) were developed for the extraction of sodium and calcium admixtures from the solution of lithium chloride. The sorption capacity of the obtained modified carbon materials under static and dynamic conditions was estimated. It was shown that the most efficient sorbent NUMS-K-1 was obtained by the saturation with SbCl5 followed by its hydrolysis. With antimony content in the carbon sorbent up to 8 %, total dynamic capacity with respect to sodium is 2.2, with respect to calcium 4 mg/g. In the course of dynamic experiments, it was established that the residual concentration of sodium at the outlet of the sorption column reaches 0.25, calcium 2 mg/L. The obtained results meet the requirements to the purity of lithium products. The promising character of the use of carbon sorbents modified with antimony (V) compounds in the processes of lithium chloride purification from sodium and calcium admixtures was demonstrated.
|
