The implementation of innovative industrial processes for the recovery of critical metals from solutions originating from the processing of both primary raw materials (ores) and secondary raw materials (waste) is one of the most important challenges facing the developing world. Production of battery grade purity materials such as lithium salts, which are used for the production of new lithium-ion cells is the key to the sustainable development of hybrid and electric cars, submarine drives or spacecraft. This article presents preliminary results of research on the solvent extraction of lithium from a solution of lithium(I) carbonate(IV) using the extractant called Mextral 3938HDC from Kopper Chemical Industry Corp., Ltd. It has been found that the efficiency of lithium ion extraction from the lithium carbonate solution is 68.9%.