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Citation: LI Quan-Min, BAI Hai-Xin, LÜ Wen-Ying. Separation of Zinc by Sodium Chloride-Ammonium Thiocyanate-Crystal Violet Floatation System[J]. Chinese Journal of Applied Chemistry, ;2002, 19(7): 649-652. shu

Separation of Zinc by Sodium Chloride-Ammonium Thiocyanate-Crystal Violet Floatation System

1.
College of Chemistry and Environmental Science, Henan Normal University, Laboratory of Environmental Science and Engineering, Education Commission of Henan Province, Xinxiang 453002

Corresponding author: LI Quan-Min,
Received Date: 15 November 2001
Available Online: 4 February 2002

The separation of Zn(Ⅱ) by a floatation system consisted of sodium chloride, ammonium thiocyanate and crystal violet has been studied. The results showed that in the aqueous solutions Zn(Ⅱ) combines with ammonium thiocyanate and crystal violet(CV) into a ternary ion-association precipitate [Zn(SCN)₄^2-]·(CV⁺)₂. Presence of small quantity of sodium chloride caused the precipitate to be floated well on the surface of water phase and separated with water more completely. Zn(Ⅱ) can be completely separated from Fe(Ⅲ)、Al(Ⅲ)、Ni(Ⅱ)、Mn(Ⅱ)、Cd(Ⅱ) by floatation at pH 1~4 of water phase. The method is simple and rapid.
- zinc(Ⅱ),
- ammonium thiocyanate,
- crystal violet,
- floatation separation
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