硫氰酸铵-十四烷基三甲基溴化铵微晶吸附体系浮选分离铜(Ⅱ)  

Flotation separation of copper(Ⅱ) using microcrystalline adsorption system of ammonium thiocyanate-tetradecyl trimethyl ammionium bromide

作　　者：涂常青[1] 温欣荣[1] 陈文[1] 

机构地区：[1]嘉应学院化学与环境学院,广东梅州514015

出　　处：《冶金分析》2013年第1期77-81,共5页Metallurgical Analysis

基　　金：广东省自然科学基金项目(S2012010010978)

摘　　要：建立了硫氰酸铵-十四烷基三甲基溴化铵微晶吸附体系浮选分离铜(Ⅱ)的新方法。探讨了硫氰酸铵溶液用量、十四烷基三甲基溴化铵(TTMAB)溶液用量和酸度等因素对Cu2+浮选率的影响,讨论了Cu2+的浮选分离机理。结果表明,在最佳条件下,由Cu2+,SCN-和十四烷基三甲基溴化铵阳离子(TTMAB+)形成的不溶于水的三元缔合物(TTMAB)2[Cu(SCN)4]被定量吸附在TTMAB+与SCN-作用产生的微晶物质TTMAB+·SCN-表面,且被浮选至水相上形成界面清晰的液-固两相,而Fe3+、Co2+、Ni 2+、Cd2+、Mn2+、Al 3+等离子仍然留在水相中,实现了Cu2+与这些离子的定量分离。据此建立了硫氰酸铵-十四烷基三甲基溴化铵微晶吸附体系浮选分离铜?的新方法,进行了合成水样中Cu2+的定量浮选分离,浮选率为93.4%～103.6%。The paper presents a novel method for the flotation separation of copper（Ⅱ） using microcrystalline adsorption system of ammonium thiocyanate-tetradecyl trimethyl ammionium bromide.The effects of different parameters,such as the dosages of NH4SCN and tetradecyl trimethyl ammionium bromide（TTMAB） and acidity on the flotation yield of Cu2＋ have been investigated to select the experimental conditions.The possible flotation separation mechanism of Cu2＋ was discussed.The results showed that under the optimum conditions,tetradecyl trimethyl ammionium bromide cation（TTMAB＋） reacted with SCN-to produce the microcrystalline matter（Ms-M） of（TTMAB＋·SCN-）.The water-insoluble ternary association complex of（TTMAB）2[Cu（SCN）4] which produced by Cu2＋ and SCN-,TTMAB＋ was quantitatively adsorbed on the surface of Ms-M of（TTMAB＋·SCN-） and floated above the water phase,the liquid-solid phases were formed with clear interface,while Fe3＋,Co2＋,Ni2＋,Cd2＋,Mn2＋ and Al3＋ could not be floated.The quantitatively separation of Cu2＋ from those metal ions was achieved by flotation.A new method for the flotation separation of trace Cu2＋ using microcrystalline adsorption system was established.The proposed method has been successfully applied to the flotation separation of trace Cu2＋ in the samples of synthetic water,and the flotation yield was 93.4%-103.6%.

关 键 词：铜(Ⅱ) 微晶吸附 浮选分离 硫氰酸铵 十四烷基三甲基溴化铵 

分 类 号：O658[理学—分析化学]