(中國科學(xué)院 化工冶金研究所， 北京 100080)
摘 要: 研究了改性劑對季銨鹽萃取分離鈷(Ⅱ)、 鐵(Ⅱ)、 錳(Ⅱ)的影響。 實驗結(jié)果表明，有機酸HB改性劑在抑制鈷(Ⅱ)、鐵(Ⅱ)、 錳(Ⅱ)萃取的同時， 改變了鐵的萃合物的性質(zhì)， 使負荷有機相中的鐵基本上不被純水反萃， 但能被稀酸反萃完全， 因此采用洗滌和分步反萃的方法可以把鈷(Ⅱ)、 鐵(Ⅱ)、 錳(Ⅱ)分離開。 萃余液含鈷小于0.03 g/L， 鈷的回收率大于98%。 反萃的氯化鈷溶液雜質(zhì)含量較低， c (Co)/ c (Fe)和 c (Co)/c (Mn)均大于300，符合優(yōu)質(zhì)工業(yè)氯化鈷的質(zhì)量要求。
關(guān)鍵字: 季銨氯化物； 萃取分離；鈷(Ⅱ)； 鐵(Ⅱ)； 錳(Ⅱ)
（Institute of Chemical Metallurgy， Chinese Academy of Sciences， Beijing 100080, P.R.China）
Abstract:The effects of modifiers on the extraction of Co(Ⅱ)， Fe(Ⅱ) and Mn(Ⅱ) with quaternary ammonium chloride(QAC) were investigated. It was found that modifier HB reduced the extraction of the three metals and also changed the property of the iron extract. The loading iron(Ⅱ) can not be stripped by water but dilute acidic solution. Co(Ⅱ)， Fe(Ⅱ) and Mn(Ⅱ) could be separated by using scrubbing and stripping. The concentration of cobalt is less than 0.03 g/L in the raffinate， and the recovery of cobalt is higher than 98%. Both the mass ratios of Co toFe and Co to Mn are higher than 300 in the produced cobalt chloride， which meets the standard for high quality cobalt chloride.
Key words: quaternary ammonium chloride; extraction separation; cobalt(Ⅱ); iron(Ⅱ); manganese(Ⅱ)
