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Effect of Diluents on the Extraction of Oxalic Acid by Trialkylphosphine Oxide

LI Yuxin; WANG Yundong; DAI Youyuan

  

  1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua
    University, Beijing 100084, China

  • Received:1900-01-01 Revised:1900-01-01 Online:2004-02-28 Published:2004-02-28
  • Contact: LI Yuxin

稀释剂对三烷基氧膦萃取草酸的影响

李玉鑫; 王运东; 戴猷元

  

  1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua
    University, Beijing 100084, China

  • 通讯作者: 李玉鑫

Abstract:

In liquid-liquid solvent extraction processes, diluents have a strong influence on the
extraction mechanism and efficiency. In this study, benzene, cyclohexane, trichloromethane,
carbon tetrachloride, methyl isobutyl ketone (MIBK), butyl acetate, and 1-octanol were used
as diluents in the extraction of oxalic acid by trialkylphosphine oxide (TRPO). The effects
of extractant concentration, initial concentration of oxalic acid and diluent type on the
extraction equilibrium partition coefficient are analyzed. The sequence of the extraction
ability by different diluents is MIBK > butyl acetate > cyclohexane=benzene > carbon
tetrachloride > 1-octanol > trichloromethane.Extraction mechanism was analyzed and
extraction model parameters were evaluated.

Key words: extraction, reversible chemical complexation, trialkylphosphine oxide, oxalic acid, diluent

摘要:

In liquid-liquid solvent extraction processes, diluents have a strong influence on the
extraction mechanism and efficiency. In this study, benzene, cyclohexane, trichloromethane,
carbon tetrachloride, methyl isobutyl ketone (MIBK), butyl acetate, and 1-octanol were used
as diluents in the extraction of oxalic acid by trialkylphosphine oxide (TRPO). The effects
of extractant concentration, initial concentration of oxalic acid and diluent type on the
extraction equilibrium partition coefficient are analyzed. The sequence of the extraction
ability by different diluents is MIBK > butyl acetate > cyclohexane=benzene > carbon
tetrachloride > 1-octanol > trichloromethane.Extraction mechanism was analyzed and
extraction model parameters were evaluated.

关键词: extraction;reversible chemical complexation;trialkylphosphine oxide;oxalic acid;diluent