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Solvent extraction of zinc(II) from ammonia leaching solution by LIX 54-100, LIX 84 i and TOA

Wejman-Gibas K., Pilsniak-Rabiega M., Ochromowicz K.

Physicochemical Problems of Mineral Processing

2017

Vol. 53, iss. 1

202--211

Commercial extractants LIX 54 -100, LIX 84 I and TOA were used to recover zinc(II) from ammonia solutions. The effect of extractant and ammonia concentration, contact time and reextraction were studied. It was found that extraction of zinc depended on the ammonia, ammonium sulphate and extractant concentration but did not depend on the contact time. The McCabe-Thiele distribution isotherm for LIX 54-100 showed that 95% of zinc(II) ions can be recovered in four stages of extraction. Reextraction of Zn(II) ions from the loaded organic phase showed that the metal can be removed almost completely using sulphuric acid.