Method of separating rhenium selectively from Re-containing solution by solvent extraction

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The present invention relates to a method to selectively separate rhenium from a rhenium containing solution by solvent extraction, which effectively separates rhenium from a rhenium containing mineral resource or a rhenium containing solution obtained by leaching a secondary resource using solvent extraction, and remarkably reduces a generation of secondary waste to have environmental performance by collecting and circulating an entire solvent used for solvent extraction. The method to selectively separate rhenium from a rhenium containing solution by solvent extraction comprises : a step of obtaining a water phase by adding an organic solvent having a cationic metal ion extraction agent to the rhenium containing solution, and primarily extracting the solution; a step of obtaining an organic phase by adding an organic solvent having a neutral metal ion extraction agent to the primarily extracted water phase, and secondarily extracting the solution; and a step of separating rhenium through a back extraction of the rhenium by adding an alkaline solution to the secondarily extracted organic phase.(AA, CC) Rhenium containing solution(BB) Solvent extraction-1(DD) Ammonia solution/plasticity sodium bicarbonate solution(EE) Solvent extraction-2(FF) Solvent extraction filtrate(GG) Ammonia water(HH) Recirculation by hydrochloric acid leaching process(II) Crystallization(J1, J2, J3) Organic phase-1(K1, K2) Recirculation(LL) Removal-1(MM) Molybdenum, tungsten enrichment solution(N1, N2, N3) Removal-2(OO) Rhenium enrichment solutionCOPYRIGHT KIPO 2016