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Solvent Extraction of p-Nitrophenol into Cyclohexane with Phosphines and Their Derivatives

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Abstract

The solvent extraction of p-nitrophenol from aqueous acid solutions into cyclohexane with trioctylphosphine (TOP), trioctylphosphine oxide (TOPO), triphenylphosphine (TPP), triphenylphosphine oxide (TPPO) and triphenylphos-phine sulfide (TPPS) was examined. The results were compared with those with trioctylamine (TOA). The extracted p-nitrophenol was found to form a 1:1 hydrogen-bonded associate with bases in the organic phase. The association constant in the organic phase was greater in the order TOPO>TPPO>TOP>TOA>TPPS>TPP. The ability of an extractant for an acid is considered from its chemical properties as a base in the organic phase. It was concluded that it may be related to the association constant with the acid in the solvent.

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Authors and Affiliations

  1. Department of Chemistry, Science University of Tokyo, Kagurazaka, Shinjuku, Tokyo, 162, Japan

    Hirochika Naganawa, Haruaki Matsuura, Yasushi Ogihara, Satoshi Kusakabe & Tatsuya Sekine

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  1. Hirochika Naganawa
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  2. Haruaki Matsuura
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  3. Yasushi Ogihara
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  4. Satoshi Kusakabe
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  5. Tatsuya Sekine
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Naganawa, H., Matsuura, H., Ogihara, Y. et al. Solvent Extraction of p-Nitrophenol into Cyclohexane with Phosphines and Their Derivatives. ANAL. SCI. 6, 287–289 (1990). https://doi.org/10.2116/analsci.6.287

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  • DOI: https://doi.org/10.2116/analsci.6.287

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