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Extraction Behavior and Wastewater Treatment of Amino Sulfonic Acid with Alamine 336

QIN Wei; LI Zhenyu; WANG Min; 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: QIN Wei

三烷基胺萃取氨基磺酸及其废水的特性研究

秦炜; 李振宇; 汪敏; 戴猷元   

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

  • 通讯作者: 秦炜

Abstract: p-Amino benzene sulfonic acid (PABSA) is selected as the solute with amphoteric functional
group,Lewis acid and Lewis base, to be separated from its dilute solutions. An aliphatic,
straight chain amine, Alamine 336, is used as the extractant, and kerosene, 1-octanol,
chloroform, butyl acetate and benzene as the diluent. The effects of pH value of solution,
extractant concentration, salt and types of diluent on the distribution coefficient, D,are
studied. There is a peak of D value with pH value of solution, the polar diluents are
favorable for extracting PABSA, and the salt in aqueous phase reduces values of D
apparently. The extraction equilibrium is described using the mass action law, and the
calculated data according to the proposed model agree with the experimental data well.
Further, the extraction behavior for other amino benzene sulfonic acids, 1-amino-8-naphtol
-3,6-disulfonic acid (H acid) and 4,4′-diaminostilbene-2,2′Cdisulfonic acid (DSD acid),
is investigated in a wide pH value region.Finally, H acid and DSD acid are successfully
removed from wastewater by the extraction with Alamine 336.

Key words: reactive extraction, equilibrium, amino sulfonic acid, Alamine 336, pH value

摘要: p-Amino benzene sulfonic acid (PABSA) is selected as the solute with amphoteric functional
group,Lewis acid and Lewis base, to be separated from its dilute solutions. An aliphatic,
straight chain amine, Alamine 336, is used as the extractant, and kerosene, 1-octanol,
chloroform, butyl acetate and benzene as the diluent. The effects of pH value of solution,
extractant concentration, salt and types of diluent on the distribution coefficient, D,are
studied. There is a peak of D value with pH value of solution, the polar diluents are
favorable for extracting PABSA, and the salt in aqueous phase reduces values of D
apparently. The extraction equilibrium is described using the mass action law, and the
calculated data according to the proposed model agree with the experimental data well.
Further, the extraction behavior for other amino benzene sulfonic acids, 1-amino-8-naphtol
-3,6-disulfonic acid (H acid) and 4,4′-diaminostilbene-2,2′Cdisulfonic acid (DSD acid),
is investigated in a wide pH value region.Finally, H acid and DSD acid are successfully
removed from wastewater by the extraction with Alamine 336.

关键词: reactive extraction;equilibrium;amino sulfonic acid;Alamine 336;pH value