Solvent Extraction of Copper(I) and Copper(II) from Aqueous Halide Solutions with Tetrabutylammonium Ions into Chloroform.

• Nasu Akinobu

  Department of Chemistry, Science University of Tokyo

• Kato Koji

  Department of Chemistry, Science University of Tokyo

• Sekine Tatsuya

  Department of Chemistry, Science University of Tokyo

書誌事項

タイトル別名

• Solvent Extraction of Copper 1 and Copp

抄録

The solvent extraction of copper(I) and copper(II) from 1 mol dm⁻³ Na(X, NO₃), where X⁻is Cl⁻, Br⁻, or I⁻, as ion-pairs of anionic halide complexes with tetrabutylammonium ions (tba⁺) into chloroform was studied in the absence and presence of a reducing agent, ascorbic acid. The extraction of copper(II) with 2-thenoyltrifluoroacetone (Htta) in chloroform from these aqueous solutions was also studied. In the absence of ascorbic acid, the extraction of copper which was added as Cu²⁺ with tba⁺ was negligible from chloride and bromide solutions but tba⁺Cu^III₃⁻ and (tba⁺)₂Cu^III₄²⁻ were extracted from iodide solutions. In the presence of ascorbic acid, the extraction of tba⁺Cu^IX₂⁻ was found from all of these halide solutions. Only copper(II) was extracted with Htta from these solutions. The distribution ratio was lower when the halide concentration was higher due to formation of copper(II) complexes in the absence of ascorbic acid and it was much lower in the presence of this reducing agent due to formation of copper(I) complexes, which were stabler than the copper(II) complexes. From the extraction data with tba⁺ and with Htta, the formation constants of copper(I) and copper(II) halide complexes from Cu²⁺ in the aqueous phase as well as the extraction constants of certain complexes into the organic phase were determined. It was concluded that the dominant metal species in the aqueous phase was Cu²⁺ when the halide concentration was low even in the presence of the reducing agent and thus copper(I) anionic complexes were extracted into the organic phase and the molar ratio of copper(I) complex species to Cu²⁺ in the aqueous phase was higher at higher halide concentrations.

収録刊行物

• Bulletin of the Chemical Society of Japan

  Bulletin of the Chemical Society of Japan 71 (9), 2141-2148, 1998

  公益社団法人 日本化学会

キーワード

• General Chemistry

詳細情報

• CRID: 1390001204120179328
• NII論文ID: 130004058209
• NII論文ID: 10008936460
• NII書誌ID: AA00580132
• DOI: 10.1246/bcsj.71.2141
• COI: 1:CAS:528:DyaK1cXlvF2js7Y%3D
• ISSN: 13480634
• ISSN: 00092673
• NDL書誌ID: 4558519
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4558519
• Web Site: https://academic.oup.com/bcsj/article-pdf/71/9/2141/56195533/bcsj.71.2141.pdf
• 本文言語コード: en
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