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  1. No Access

    Chapter and Conference Paper

    Development of New Extractants for Platinum Group Metal Ions in Hydrochloric Acid Solutions

    is widely used for the separation and purification of platinum group metal ions. This paper describes our development of two series of for Pd( (III) chloridometalates. We have found that sulfide-diamide-t...

    Hirokazu Narita in Rare Metal Technology 2022 (2022)

  2. No Access

    Article

    Solubilization of Rhodium in Hydrochloric Acid Using an Alkali Metal Salt Method

    Acids such as aqua regia, a 3:1 mixture of hydrochloric acid (HCl) and nitric acid, that contain strong oxidizing agents are used in the dissolution-based recovery of platinum group metals (PGMs). However, nit...

    Ryo Kasuya, Katsuhiro Nomura, Hirokazu Narita in Metallurgical and Materials Transactions B (2020)

  3. No Access

    Chapter and Conference Paper

    Equilibrium Modeling of Solvent Extraction and Strip** of Copper(II), Nickel(II), and Ammonia for Ammoniacal Process Using LIX® 84-I

    (II) and (II) are often recovered from ammoniacal alkaline solutions by using hydroxyoxime extractants: both (II) and (II) are extracted from ammoniacal alkaline solutions and, from the loaded organic p...

    Shubin Wang, Jie Li, Hirokazu Narita, Mikiya Tanaka in Extraction 2018 (2018)

  4. No Access

    Chapter and Conference Paper

    Adsorbents for Selective Recovery of Heavy Rare Earth Elements

    There is an increasing attention to recover dilute rare earth elements (REEs) from acidic solutions in order to meet their demands and stabilize their supply chain. Adsorption is suitable for recovering target...

    Takeshi Ogata, Hirokazu Narita, Mikiya Tanaka in Rare Metal Technology 2017 (2017)