Anion Exchange Behavior of Copper and SomeMetallic Impurities in HC1 Solutions

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Abstract

In order to lay a foundation of a potentially efficient separation procedure for copper in hydrochloric acid solutions, we have investigated the adsorption of copper and several characteristic impurity elements on a strongly basic anion exchange resin in a wide range of HC1 concentration. Further experiments were carried out to determine the HC1 concentrations and activities in the resin phase. The initial increase of the obtained equilibrium distribution coefficients with increasing HC1 concentration indicates the formation of negatively charged complex ions. This tendency of the adsorbability functions is generally reversed at higher HC1 concentrations. Analysis of the ion exchange equilibrium based on the obtained adsorbability and activity functions in the higher HC1 range provided an interpretation of anion exchange behavior and pointed out the probable average charges carried by the stable, exchangeable species. Possible associations of the examined ions have also been taken into consideration. Comparison of the adsorbability functions showed sufficiently large differences to allow effective purification of initially monovalent copper in chloride solutions, and the obtained average charge of the Cu(I) species can be applied to loading considerations.

Original languageEnglish
Pages (from-to)406-413
Number of pages8
JournalMaterials Transactions, JIM
Volume35
Issue number6
DOIs
Publication statusPublished - Jan 1 1994

Keywords

  • HCl activity coefficient
  • adsorbability function
  • anion exchange
  • average charge of ions
  • chloro-complex anions
  • copper purification
  • distribution coefficient

ASJC Scopus subject areas

  • Engineering(all)

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