摘要
研究了硫酸铵-丁二酮肟-溴化十六烷基三甲基铵体系萃取浮选镍Ⅱ的行为。结果表明,控制pH6.0,在1.0 g（NH4）2SO4存在下,当5.0×10-3mol/L丁二酮肟（DMG）溶液用量为1.00mL,0.01 mol/L溴化十六烷基三甲基铵（CTMAB）溶液的用量为1.50 mL时,Ni2＋与DMG生成的丁二酮肟镍[Ni（DMG）2]螯合物沉淀,可被萃取浮选至溴化十六烷基三甲基铵（CTMAB）形成的泡沫相上,形成界面清晰的两相,从而使Ni2＋被定量萃取浮选,而K＋、Na＋、Ca2＋、Mg2＋、Zn2＋、Mn2＋、Cu2＋、Cd2＋等离子在此条件下不被萃取浮选,实现了Ni2＋与这些离子的分离,据此建立了萃取浮选分离镍（的新方法。该方法对合成水样中微量Ni2＋进行的定量萃取浮选分离,萃取浮选率为95.2%~103.4%。
The extraction flotation behaviour of nickelⅡ by ammonium sulfate-dimethylglyoxime-cetyl trimethyl ammonium bromide system was studied.The results showed that,in the presence of 1.0 g of（NH4）2SO4,when the adding dosage of 5.0×10-3 mol/L dimethylglyoxime（DMG） solution was 1.00 mL and 0.01 mol/L cetyl trimethyl ammonium bromide（CTMAB） solution was 1.50 mL,respectively,the chelate precipitates of nickel dimethylglyoxime [Ni（DMG）2] formed by Ni2＋ and DMG was extracted and floated to CTMAB forth phase to form two phases with clear interface.Thereby,Ni2＋ was extracted and floated quantitatively by contolling pH6.0.In this condition,K＋,Na＋,Ca2＋,Mg2＋,Zn2＋,Mn2＋,Cu2＋,Cd2＋ could not be extracted and floated.Therefore,the quantitative separation of Ni2＋ from the above metal ions could be achieved and herehy,a new method for extraction flotation separation of Ni2＋ was established.The proposed method has been used for the extraction flotation separation of trace Ni2＋ in the sample of synthetic water with the extraction flotation yield of 95.2%-103.4%.
出处
《冶金分析》
CAS
CSCD
北大核心
2010年第11期66-70,共5页
Metallurgical Analysis
基金
嘉应学院科学研究基金资助(2005KJZ02)
关键词
镍Ⅱ
丁二酮肟
溴化十六烷基三甲基铵
萃取浮选
nickelⅡ
dimethylglyoxime
cetyl trimethylammonium bromide
extraction flotation
