氯化钠-硫氰酸铵-结晶紫体系浮选分离锌(Ⅱ)

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

研究了氯化钠 -硫氰酸铵 -结晶紫体系浮选分离锌 ( )的行为 .研究表明 ,在水溶液中 ,Zn( )与NH4SCN、结晶紫 (CV)生成三元离子缔合物沉淀 [Zn(SCN) 2 -4]· (CV+ ) 2 .在少量 Na Cl存在下 ,该沉淀能很好地浮于水相表面并和水完全分离 .在水相 p H值为 1～ 4时 ,通过浮选可使 Zn( )与 Fe( )、Al( )、Ni( )、Mn( )、Cd( )离子的完全分离 .

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) 2- 4]·(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.