Characteristics of Cu(II) Extraction by β-ketohexanal

β-ketohexanal에 의한 Cu(II)의 추출 특성

  • 신정호 (부산대학교 공과대학 화학공학과) ;
  • 이상훈 (부산대학교 공과대학 화학공학과) ;
  • 정갑섭 (동명전문대학 공업화학과) ;
  • 박경기 (부산대학교 공과대학 화학공학과) ;
  • 전상우 (부산대학교 공과대학 화학공학과)
  • Received : 1996.07.16
  • Accepted : 1996.09.30
  • Published : 1996.12.10

Abstract

$\beta$-ketohexanal as a chelating extractant was synthesized from the reaction of ethyl formate and methyl propyl ketone in the presence of sodium amide, and the equilibrium characteristics in the extraction of copper by $\beta$-ketohexanal-chloroform were investigated. The equilibrium constants such as the dissociation constant and the partition coefficients of $\beta$-ketohexanal, the stability constant and the partition coefficient of copper chelating complex, and the overall equilibrium constant in the extraction of copper were determined by spectrophotometric measurements, and the mechanism of extraction was proposed. The percent of extracted copper by $\beta$-ketohexanal-chloroform was near 100%, and the selective extraction of copper from Cu-Zn-Cd mixture was possible. Copper was found to be extracted as $CuR_2$ and the equilibrium reaction was expressed as $Cu^{2+}+2{\overline{HR}}{\rightleftarrows}{\overline{CuR{_2}}}+2H^+$.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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