Solvent extraction of copper(II) from chloride solutions using 1,1′-dialkyl-2,2′ bibenzimidazoles as extractants

• Autorzy: Mądrzak-Litwa Iwona , Borowiak-Resterna Aleksandra

Identyfikatory

DOI

10.5277/ppmp19039

• Języki publikacji: EN

Abstrakty

EN

The solvent extraction ability of 1,1′-dialkyl-2,2′-bibenzimidazoles (L) for the recovery of copper(II) ions from aqueous chloride solutions has been investigated. It was found that 1,1′-didecyl- 2,2′-bibenzimidazole is a useful extractant for the separation of copper(II) ions from both weakly and strongly acidic solutions. Copper(II) can be effectively stripped of organic solutions by a water or ammonia solution in a one-stage process. In low acidity media (pH _feed > 1), the extraction percentage of Cu(II) increases with an increase in metal ions and chloride concentrations. Copper(II) ions are extracted as binuclear complexes (CuCl₂) ₂L₂ (L = extractant). The constructed McCabe−Thiele diagram shows that the reduction of copper(II) ions concentration from 25 to approximately 5 g/dm³ in an aqueous feed is possible in two extraction stages. When [HCl] _feed ≥ 1 M, (LH⁺)₂(CuCl ₄ ²)L complex is formed. From the strongly acidic solutions ([HCl] = [LiCl] = 4 M), almost 100% of copper(II) ions can be removed by 1,1′-didecyl-2,2′-bibenzimidazole. Benzyl alcohol, used as an organic phase modifier, enables the selective extraction of copper(II) over zinc(II) ions from a weakly acidic chloride solution.

Słowa kluczowe

EN

copper; solvent extraction; metal removal; chloride solution; 2,2′-bibenzimidazole

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 5
• Strony: 1165--1178
• Opis fizyczny: Bibliogr. 56 poz., rys., tab., wykr., wz.

Twórcy

autor

Mądrzak-Litwa Iwona

• Poznan University of Technology, Institute of Chemical Technology and Engineering, ul. Berdychowo 4, 60-965 Poznań, Poland

autor

Borowiak-Resterna Aleksandra

• Poznan University of Technology, Institute of Chemical Technology and Engineering, ul. Berdychowo 4, 60-965 Poznań, Poland

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).