Abstract
Decomposition of the LiOH · 2Al(OH)3 · nH2O compound (technical name hydroxy dialuminat lithium, or GDAL in Russian nomenclature) in water in temperature range t = 20−90°C is investigated. The compound was obtained by the interaction of an aluminate solution containing 130 g/L Al2O3 with a 2.0 caustic module (the molar ratio Na2O: Al2O3) and a lithium chloride solution at t = 60°C. The complete decomposition of the starting compound is attained in water in the presence of the KU-2-8 sulfonic cationexchange resin and the weight ratio “starting substance: water: ionite” = 1: 20: 4.8 at t = 80°C. Lithium was desorbed from the KU-2-8 ionite by the 1% HCl solution at t = 70°C in dynamic conditions.
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