溶媒抽出法による使用済み無電解ニッケルめっき浴からの金属成分の分離 Separation of the Metals in the Spent Electroless Nickel Plating Baths by Solvent Extraction

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著者

    • 田中 幹也 TANAKA Mikiya
    • 産業技術総合研究所 環境調和技術研究部門 National Institute of Advanced Industrial Science and Technology (AIST)
    • 小林 幹男 KOBAYASHI Mikio
    • 産業技術総合研究所 環境調和技術研究部門 National Institute of Advanced Industrial Science and Technology (AIST)
    • 関 努 SEKI Tsutomu
    • 千葉工業大学大学院 工学研究科 Graduate Student, Chiba Institute of Technology

抄録

With increasing importance of the electroless nickel plating technology in many fields such as electronic and automobile industries, the treatment of the spent baths is becoming a serious problem. Although the spent baths are currently treated by the conventional precipitation method, a method without sludge generation is desired. This work aims at establishing a recycling process of nickel from the spent baths. Solvent extraction of nickel, iron, and zinc in two types of spent baths (A and B) has been investigated using 2-hydroxy-5-nonylacetophenone oxime (LIX84I) and the acidic organophosphorus compounds such as bis (2-ethylhexyl)phosphoric acid (D2EHPA), 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (PC88A) and bis (2, 4, 4-trimethylpentyl) phosphinic acid (Cyanex272) as the extractants. Spent bath A is weakly acidic (pH 4.8) and contains 70 g m<sup>-3</sup> of zinc as an impurity, and spent bath B is very weakly acidic (pH 6.0) and contains boron. The following results have been obtained: (i) Nickel in spent bath A can be extracted with LIX84I at the pH larger than 6 with high efficiency leaving most of zinc and iron in the aqueous phase. Also, nickel in spent bath B can be efficiently extracted without adjusting pH. (ii) According to the McCabe-Thiele analysis, the concentrated nickel sulfate solution (> 100 kg-Ni m<sup>-3</sup>) with low sulfuric acid content is obtained by the countercurrent two stage stripping from the Ni-bearing LIX84I using the mixed solution of 0.9 kmol m<sup>-3</sup> NiSO<sub>4</sub> and 1 kmol m<sup>-3</sup> H<sub>2</sub>SO<sub>4</sub> as the stripping reagent. (iii) Iron and zinc in spent bath A can be selectively extracted with the acidic organophosphorus compounds. PC88A and Cyanex272 are more advantageous than D2EHPA because, in the former extractants, the coextraction of nickel is lower and the stripping of iron and zinc is easier. Based on these results, the flowsheets for recovering nickel from the spent baths are proposed.

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 118(12), 751-755, 2002-12-25

    The Mining and Materials Processing Institute of Japan

参考文献:  11件中 1-11件 を表示

被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    10010084980
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    6422434
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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