Plakhotnik V. N. UkraineDnepropetrovsk Dnepropetrovsk National University of Railway Transport, 2, Lazaryan St., Dnepropetrovsk, 49010 Author's articles Salvaging of exhausted lithium batteries of system Li/LiBF4-GBL/(CFx)n Production of electrolytes based on LiPF6 and mixtures of carbonate estors by means of double exchange reactions