(中國(guó)科學(xué)院 化工冶金研究所， 北京 100080)
摘 要: 研究了用季銨鹽從含氯化鈉接近飽和的溶液中萃取分離二價(jià)金屬離子鈷、鐵、 錳的方法。 實(shí)驗(yàn)結(jié)果表明， 以含少量異辛醇改性劑的季銨氯化物的煤油溶液為萃取劑， 萃取時(shí)盡管有15%～20%的二價(jià)錳和鈷一起被萃取， 但通過(guò)兩級(jí)洗滌可將負(fù)荷有機(jī)相中的錳降低到0.02 .g/L以下， 經(jīng)三級(jí)洗滌除錳即可達(dá)到鈷、 錳分離。 鈷的回收率可達(dá)98%， 負(fù)荷有機(jī)相中鈷錳含量比大于300。
關(guān)鍵字: 萃取分離； 鈷(Ⅱ)； 錳(Ⅱ)； 季銨氯化物
（Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, P.R.China）
Abstract:The solvent extraction separation of cobalt(Ⅱ) and manganese(Ⅱ) from a waste solution containing saturation sodium chloride was investigated. The experimental results showed that quaternary ammonium chloride(QAC) with isooctanol as modifier and kerosene as diluent is suitable to separate cobalt(Ⅱ) and manganese(Ⅱ). Although 15%～20% divalent manganese(Ⅱ) was coextracted with cobalt, manganese in loading organic phase could be reduced from 0.4 g/L to 0.02 g/L in one stage scrubbing with a saturated sodium chloride solution. A feed solution containing 0.6 g/L of Mn(Ⅱ), 1.5 g/L of Co(Ⅱ) extracted with a 0.3 mol/L of QAC and 5% of isooctanol in a four stage counter current extraction and a three stage scrubbing, and then stripped with pure water, a recovery of 98% cobalt and a ratio of Co/Mn>300 were achieved.
Key words: extractive separation; cobalt(Ⅱ); manganese(Ⅱ)； quaternary ammonium chloride
