RECOVERY METHOD OF RUTHENIUM

摘要

PROBLEM TO BE SOLVED: To provide a recovery method of ruthenium, which secures a high recovery rate of ruthenium even when using a large reaction tank, and is suitable for practical use.SOLUTION: The recovery method of ruthenium includes the steps of: distilling ruthenium tetroxide from a platinum group metal-containing solution including ruthenium; and absorbing the ruthenium tetroxide in hydrochloric acid to recover a ruthenium chloride acid solution. The ruthenium tetroxide is distilled by dripping the platinum group metal-containing solution into a heated oxidant aqueous solution.