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Synthesis of water-soluble compounds of platinum group metals in molten glass media

Research Project

Project/Area Number 18K05199
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
Research InstitutionUniversity of Fukui

Principal Investigator

Okada Takashi  福井大学, 学術研究院工学系部門, 准教授 (30641625)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords白金族金属 / 水溶化 / 酸化 / 錯形成 / リサイクル / 溶融媒体 / 白金族錯体 / 錯体の形成挙動 / 価数 / 配位子 / 難水溶性白金族化合物 / 化学状態 / 配位数 / 加熱雰囲気 / 反応容器の材質 / アルミナ / パラジウム水溶化率 / アルカリ金属種
Outline of Final Research Achievements

Synthesis of water-soluble PGM compounds in a molten alkaline borate media was studied for the purpose of extracting PGMs without hazardous aqua regia in PGM recycling processes. Chemical forms of the compounds were investigated by spectroscopic methods, and effects of components of the molten media (cations and anions) and heating duration on the PGM solubilization efficiencies were evaluated. In the molten media, water-soluble and dilute acid-soluble PGM compounds were generated, and PGMs, Al, B, and alkaline metals were present in latter compounds. The solubilities of the compounds depended on the proportion of the elements and their chemical states. Pt and Pd tended to form water-soluble compounds, whereas Rh did dilute acid-soluble compounds. Among Li, Na, K, and Cs, molten media in potassium system produced large quantities of the water-soluble PGM compounds.

Academic Significance and Societal Importance of the Research Achievements

従来のPGMリサイクルでは、強力な酸化剤を有する酸(王水、塩素ガスと塩酸)を用いてPGMsを溶解する。これらの酸は腐食性が高く有害であり、環境負荷低減の観点から使用を避けることが望ましい。本手法をPGMリサイクルに応用することができれば、クリーンな水によるPGM溶解プロセスを開発することにつながるため、社会的に意義がある。また、PGMsと他成分の複合酸化物を対象とし、水溶性の形態に変換することに着目した点に特色がある。アルカリホウ酸塩媒体における水溶性PGM複合酸化物の生成挙動に関するデータは、水溶化反応の制御方法を確立するうえで有用であり、学術的に意義がある。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) Patent(Industrial Property Rights) (4 results) (of which Overseas: 1 results)

  • [Journal Article] Leaching characteristics of palladium heat-treated in a molten K2CO3-K2O-B2O3-Al2O3 media2021

    • Author(s)
      Takashi Okada, Fumihiro Nishimura, Susumu Yonezawa
    • Journal Title

      Materials Chemistry and Physics

      Volume: 271 Pages: 124918-124918

    • DOI

      10.1016/j.matchemphys.2021.124918

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reactivity of metallic palladium in a K2CO3-K2O-B2O3-Al2O3 melt2020

    • Author(s)
      Takashi Okada, Fumihiro Nishimura, Susumu Yonezawa
    • Journal Title

      Results in chemistry

      Volume: 2 Pages: 1-9

    • DOI

      10.1016/j.rechem.2020.100077

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Solubilization of palladium in molten mixture of sodium borates and sodium carbonate2019

    • Author(s)
      Takashi Okada, Yoshiya Taniguchi, Fumihiro Nishimura, Susumu Yonezawa
    • Journal Title

      Results in Physics

      Volume: 印刷中 Pages: 102281-102281

    • DOI

      10.1016/j.rinp.2019.102281

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] カリウムホウ酸塩中における可溶性ロジウム化合物の生成挙動2020

    • Author(s)
      佐竹悠理、岡田敬志
    • Organizer
      日本化学会近畿支部北陸地区講演会と研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] アルカリホウ酸塩媒体中における水溶性パラジウムの合成2019

    • Author(s)
      西悠斗
    • Organizer
      日本化学会近畿地区発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 水溶化技術を用いた白金族金属のクリーンな回収2019

    • Author(s)
      岡田敬志
    • Organizer
      JST新技術説明会
    • Related Report
      2019 Research-status Report
  • [Presentation] ナトリウムホウ酸塩媒体中における金属パラジウムの水溶化2018

    • Author(s)
      谷口義弥,岡田敬志
    • Organizer
      日本化学会近畿支部 平成30年度 北陸地区講演会
    • Related Report
      2018 Research-status Report
  • [Patent(Industrial Property Rights)] 白金族金属の回収方法、白金族金属含有組成物およびセラミックス材料2021

    • Inventor(s)
      岡田敬志、谷口義弥、西悠斗
    • Industrial Property Rights Holder
      国立大学法人福井大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report
    • Overseas
  • [Patent(Industrial Property Rights)] 前処理方法、白金族金属の回収方法2020

    • Inventor(s)
      岡田敬志
    • Industrial Property Rights Holder
      国立大学法人福井大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-013995
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 前処理方法、白金族金属の抽出方法、および白金族金属の抽出システム2019

    • Inventor(s)
      岡田敬志
    • Industrial Property Rights Holder
      国立大学法人福井大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-237037
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 前処理方法、白金族金属の抽出方法、および白金族金属の抽出システム2018

    • Inventor(s)
      岡田 敬志、谷口 義弥、福澤 伸
    • Industrial Property Rights Holder
      国立大学法人福井大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2018-245981
    • Filing Date
      2018
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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