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Citation: Gao Zili, Sun Sixiu, Dong Jinhua, Gai Huifa, Shen Jinglan. KINETICS OF SOLVENT EXTRACTION OF COBALT(Ⅱ) BY QUATERNARY AMMONIUM THIOCYANATE[J]. Chinese Journal of Applied Chemistry, ;1989, 6(5): 73-76. shu

KINETICS OF SOLVENT EXTRACTION OF COBALT(Ⅱ) BY QUATERNARY AMMONIUM THIOCYANATE

1.
Department of Chemistry, Shandong University, Jinan

Received Date: 13 April 1988
Available Online: 11 March 1989

The kinetics and mechanism of the extraction of Co(Ⅰ) from sulphate solution with quatornary ammonium thiocyanate (QSCN, Q-CH₃ N [CH₂(CH₂)_6-10CH₃]₃) in kerosene were studied by means ot single drop method at 298K. The experimental results indicate that the extraction process is controlled by the following interface reactions:CoSO₄+2QSCN_(i)CoSO₄·2QSCN_(i), slow CoSO₄·2QSCN_(i)+2QSCN_(o)Q₂Co(SCN)Q_4(o)+Q₂SO₄, slow lgK₁'=lgK₁[QSCN]²(i)=-4.49;lgK_-1/K₂=2.56.where(o) and (i) represent organic phase and interface, respectively.
- Cobalt(Ⅱ),
- Extraction kinetics,
- Quaternary ammonium thiocyanate
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