METHOD FOR CONCURRENTLY RECOVERING LITHIUM SALT FOR ELECTROLYTE USE AND ORGANIC SOLVENT FROM WASTE ELECTROLYTIC SOLUTION, AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a method for concurrently recovering a lithium salt for electrolyte use and an organic solvent, which can be preferably reused for lithium batteries and lithium ion batteries, from waste electrolytic solution resulting from a trouble in a manufacturing process of the lithium batteries and the lithium ion batteries, and from waste electrolytic solution collected from used batteries while suppressing the production of a lithium salt insoluble to organic solvent; and a device which allows such a method to be implemented.;SOLUTION: A method for concurrently recovering a lithium salt for electrolyte use and an organic solvent from waste electrolytic solution comprises the steps below in a process for heating and condensing, by an evaporator, the waste electrolytic solution containing the organic solvent and the lithium salt serving as electrolyte of lithium batteries and/or lithium ion batteries thereby causing the lithium salt to crystallize and concurrently, condensing, by a condenser, the organic solvent evaporated by the evaporator and recovering the condensed organic solvent: mutually communicating the evaporator and the condenser thereby forming a sealable system; evaporating the organic solvent by heating the waste electrolytic solution while controlling the amount of emission of uncondensed gas in the condenser to outside the system in the evaporator; and condensing, by the condenser, the organic solvent evaporated by the evaporator.;COPYRIGHT: (C)2015,JPO&INPIT