摘要
在水溶液中,Pt(与碘化钾、十六烷基三甲基溴化铵形成不溶于水的三元缔合物,在少量硫酸铵存在下,此三元缔合物沉淀浮于盐水相上层形成界面清晰的液-固两相。在pH3溶液中,当十六烷基三甲基溴化铵、碘化钾和硫酸铵的浓度分别为7.0×10-4mol/L,4.0×10-3mol/L,0.5mol/L时,Pt(被定量浮选,而Cr(Ⅲ),Co(Ⅱ),Mn(Ⅱ),Ni(Ⅱ),Al(Ⅲ),Fe(Ⅱ),Zn(Ⅱ),V(Ⅴ)(离子在该体系中不被浮选,实现了PtⅣ与这些离子的定量分离。对Ni-Pt/Al2O3催化剂中铂的定量浮选分离和测定,测得值与推荐值相符,相对标准偏差为2.5%。
The behavior and conditions for the flotation separation of platinum（Ⅳ） from other metal ions were investigated with cetyltrimethylammonium bromide-potassium iodide--ammonium sulfate system. It showed that Pt（Ⅳ） with potassium iodide and cetyltrimethylammonium bromide formed a ternary associated complex, which was insoluble in water and floated on the upper layer of salt-water to enable the system to divide into both liquid and solid phases with a distinct boundary. Pt（Ⅳ） can be separated completely from Cr（Ⅲ）, Co（Ⅱ）, Mn（Ⅱ）, Ni（Ⅱ）, Al（Ⅲ）, Fe（Ⅱ）, Zn（Ⅱ） and V（Ⅴ） in the presence of 7.0 ×10^-4 mol/L cetyltrimethylammonium bromide,4.0 × 10^-3 mol/L potassium iodide and 0.5 mol/L ammoni- um sulfate at pH 3.0. The method was applied to the separation of Pt（Ⅳ）in the synthetic solution and Ni--Pt/Al2O3 catalyst with RSD of 2.5% and the results are agreement with the certified values.
出处
《冶金分析》
CAS
CSCD
北大核心
2007年第9期60-63,共4页
Metallurgical Analysis
基金
河南省教育厅自然科学研究计划项目(2006150023)
关键词
铂
十六烷基三甲基溴化铵
碘化钾
硫酸铵
浮选
platinum（Ⅳ）
cetyltrimethylammonium bromide
potassium iodide
ammonium sulfate
floatation separation
