Method for collection of ruthenium or ruthenium compound
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsTakashi Ouchi, Yoshio Nishimura
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Abstract
According to the present invention, ruthenium or a ruthenium compound, which is expensive, can be collected with high efficiency even from an aqueous solution containing a water-soluble salt, a lower alcohol, an organic acid or the like, by adding at least one specific inorganic adsorbent to an aqueous solution containing ruthenium or the ruthenium compound, dissolving the entirety or a part of the inorganic adsorbent under an acidic condition, and then adding an alkali to adjust the solution to be an alkaline solution having a pH value of 7 or higher, thereby depositing the inorganic adsorbent while causing the inorganic adsorbent to adsorb ruthenium or the ruthenium compound.
Claims10
A method for collection of ruthenium or a ruthenium compound, comprising the steps of:
- putting an aqueous solution containing ruthenium or a ruthenium compound into contact with an inorganic adsorbent;
- dissolving the entirety or a part of the inorganic adsorbent under an acidic condition;
- and
- adding an alkali to deposit the dissolved inorganic adsorbent while causing the inorganic adsorbent to adsorb ruthenium or the ruthenium compound.
Dependencies are inferred from the claim text.