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Amirov, R. R.

doi:10.1023/a:1025110304722

Cited by 6 publications

(1 citation statement)

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“…Therefore, the optimum value for mixing speed was determined as 1000 rpm. , whereas in case of nickel ions they hardly form the thiocyanate complex [22][23][24]. Preston [20] stated that the cobalt is extracted as the tetrahedral anion, Co(SCN) 4 2− , from the examination of electronic spectra of organic extract, while nickel forms an octahedral complex, probably Co(SCN) 4 ·(H 2 O) 2 2− .…”

Section: Effect Of Mixing Speedmentioning

confidence: 99%

Separation of Co(II) from Zinc Plant Acidic Thiocyanate Leach Solutions Containing Co(II) and Ni(II) by Solvent Extraction Using Trioctylamine in Toluene

Eyüpoğlu

Kumbasar

2011

SERDJ

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In this study, a zinc plant purification cake (CINKUR Co. Turkey) was leached with sulphuric acid and an acidic leach solution containing Zn(II), Fe(II), Pb(II), Al(III), Cu(II), Co(II) and Ni(II) ions was obtained. After purification, ammonium thiocyanate and water were added to the remaining leach solution containing Co(II) and Ni(II) ions to adjust the chemical media and ion concentration. The acidic thiocyanate leach solutions were used in solvent extraction experiments. The various parameters were studied to determine the extraction and striping behaviour of Co(II). These parameters were diluent type, feed solution pH, extractant concentration, mixing speed, phase ratio, stripping solution type and concentration and etc. Under optimum extraction conditions, the maximum extraction efficiency (99.9 %) was achieved when using 5.0 %(v/v) TOA in toluene within 5 min. The extracted Co(II) was stripped effectively from the organic phase using 5.0 M NH 3 solution.

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