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首页> 外文期刊>RSC Advances >Separation of iron(iii), zinc(ii) and lead(ii) from a choline chloride–ethylene glycol deep eutectic solvent by solvent extraction
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Separation of iron(iii), zinc(ii) and lead(ii) from a choline chloride–ethylene glycol deep eutectic solvent by solvent extraction

机译：通过溶剂萃取将铁（III），锌（II），锌（II），锌（II）和铅（II）的铅（II）分离，溶剂萃取

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摘要

Deep eutectic solvents (DESs) were used as alternatives to the aqueous phase in solvent extraction of iron( III ), zinc( II ) and lead( II ). The selective extraction of iron( III ) and zinc( II ) was studied from a feed of ethaline (1?:?2 molar ratio of choline chloride?:?ethylene glycol) and lactiline (1?:?2 molar ratio of choline chloride?:?lactic acid), with the former DES being more selective. A commercial mixture of trialkylphosphine oxides (Cyanex 923, C923) diluted in an aliphatic diluent selectively extracted iron( III ) from a feed containing also zinc( II ) and lead( II ). The subsequent separation of zinc( II ) from lead( II ) was carried out using the basic extractant Aliquat 336 (A336). The equilibration time and the extractant concentration were optimized for both systems. Iron( III ) and zinc( II ) were stripped using 1.2 mol L ~(?1) oxalic acid and 0.5 mol L ~(?1) aqueous ammonia, respectively. An efficient solvometallurgical flowsheet is proposed for the separation and recovery of iron( III ), lead( II ) and zinc( II ) from ethaline using commercial extractants. Moreover, the process was upscaled in a countercurrent mixer-settler set-up resulting in successful separation and purification.
机译：深度共晶溶剂（DESS）作为溶剂萃取（III），锌（II）和铅（II）中的溶剂萃取中水相的替代物。研究了铁（III）和锌（II）的选择性提取（1？：2摩尔氯化胆碱的摩尔比，乙二醇）和乳菌素（1？：2摩尔比的胆碱氯化物？：？乳酸），前者更具选择性。在脂族稀释剂中稀释的三烷基氧氧化物（Cyanex 923，C923）的商业混合物从含锌（II）和铅（II）的饲料中选择性地萃取铁（III）。使用碱性萃取剂Aliquat 336（A336）进行从铅（II）中的随后分离锌（II）。对两个系统进行了优化的平衡时间和萃取剂浓度。使用1.2mol L〜（α1）草酸和0.5mol L〜（α1）氨水剥离铁（III）和锌（II）。提出了一种有效的溶解型流动，用于使用商业萃取剂从金属化物中分离和恢复铁（III），铅（II）和锌（II）。此外，该方法在逆流混合器 - 沉降器设置中升高，导致成功分离和纯化。

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