METHOD OF SEPARATING RHENIUM SELECTIVELY FROM RE-CONTAINING SOLUTION BY SOLVENT EXTRACTION

摘要

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.