METHOD FOR PRODUCING RHENIUM SULFIDE, METHOD FOR PRODUCING AQUEOUS PERRHENIC ACID SOLUTION, METHOD FOR PRODUCING POTASSIUM PERRHENATE, METHOD FOR PRODUCING AMMONIUM PERRHENATE, AND METHOD FOR PRODUCING RHENIUM METAL

摘要

PROBLEM TO BE SOLVED: To provide a method which can produce rhenium sulfide with little impurity having a shape suitable for improving a volatilization ratio of rhenium in calcination, and can produce high-purity perrhenic acid from this rhenium sulfide by using a dry process.SOLUTION: The method for producing rhenium sulfide comprises: a step of passing an acidic solution containing rhenium through an anion exchange resin to have rhenium adsorbed by the anion exchange resin; a step of passing as an eluent a hydrochloric acid-containing solution containing zinc through the anion exchange resin by which rhenium is adsorbed to elute rhenium therefrom; and a step of subjecting rhenium contained in a liquid after elution to a sulfidation treatment to obtain rhenium sulfide having a zinc concentration of 0.5 mass% or less.