Lithium-sodium separation method

Abstract

Disclosed is a new continuous lithium-sodium separation method. A lithium-sodium separation mother solution, a first leacheate, a desorption solution, a second leacheate and a lithium-sodium separation adsorption tail solution respectively pass through a lithium-sodium separation mother solution feeding pipe (), a first leacheate feeding pipe (), a desorption solution feeding pipe (), a second leacheate feeding pipe () and an adsorption tail solution top desorption solution feeding pipe () that are located above and below a rotary disc of a multi-way change-over valve system (), respectively enter corresponding resin columns () by means of pore channels and channels in the multi-way change-over valve system (), and then are discharged from an adsorption tail solution discharging pipe (), a first leacheate discharging pipe (), a qualified liquid discharging pipe (), a second leacheate discharging pipe () and an adsorption tail solution top desorption solution discharging pipe (), so as to complete the whole technological process, wherein the resin columns () are connected in series or in parallel by means of the channels located in the multi-way change-over valve system (). The method is simple and easy to operate, the resin utilization rate is improved by 20% or more, the efficiency is improved by 40% or more, and the production cost can be reduced by 30-50%. The production reliability is improved, and all-year continuous operation can be realized.