离子液体(R4PSCN)对从废铜铬催化剂浸出液中选择性分离和回收铜的影响

IF 4.8 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Saroj Sekhar Behera , Pankaj Kumar Parhi
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引用次数: 0

摘要

通过溶剂萃取方法,对从硫酸盐介导的 CuCr 废催化剂浸出液中分离和回收铜(Cu)进行了系统研究。在研究离子液体(IL)或萃取剂对铜(II)的选择性和高效萃取倾向时,使用了一些离子液体(IL)和其他传统萃取剂。在铜萃取效率方面,采用的有机试剂从高到低依次为R4PSCN > R4PD > R4PCy > Cyphos 101 > Aliquot 336 > D2EHPA > Cyanex 272。根据斜率分析法确定了铜(II)的萃取行为。结果表明,萃取是通过阳离子交换机制进行的,每摩尔 R4PSCN 与一摩尔的 Cu(II) 结合。对数 D 与对数 [R4PSCN] 的关系图显示出斜率接近 4 的线性关系,从而提出了萃取反应机制/化学计量学。使用傅立叶变换红外光谱分析负载有机相和稀释剂,进一步研究了 Cu(II) 和 IL 之间络合物的性质。为预测 Cu(II)的定量萃取,绘制了 Mc-Cabe Thiele 图,该图显示在水相与有机相(A:O)体积比为 =3:1 时需要两个阶段。在最佳 NH4OH 浓度(0.4 M)下构建的汽提等温线表明,需要在 O:A 相体积比 = 2:1 的条件下分两阶段完全汽提铜,并再生 R4SCN 以供进一步使用。两种等温线条件均通过 6 个循环的逆流模拟(CCS)研究进行验证,以获得所需量的 Cu(II)负载 R4SCN(萃取过程中)和/或剥离铜溶液(剥离过程中)。铜的总体富集量为∼6 倍,从而从 6 克/升的铜(II)溶液中得到 48 克/升的铜(II)溶液。对剥离溶液进行结晶研究,以产生高纯度的硫酸铜晶体,并通过晶体相的 XRD 分析加以确认。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of ionic liquid (R4PSCN) for selective separation and recovery of copper from spent CuCr catalyst leach liquor

Influence of ionic liquid (R4PSCN) for selective separation and recovery of copper from spent CuCr catalyst leach liquor

Separation and recovery of copper (Cu) from sulphate mediated CuCr spent catalyst leach solution through solvent extraction approach has been systematically investigated. A number of Ionic Liquid (IL) and other conventional extractants were used while investigating the selectivity and efficient extraction tendency of either IL or extractants towards Cu(II). In context of copper extraction efficiency, the adopted organic reagents followed the descending order: R4PSCN > R4PD > R4PCy > Cyphos 101 > Aliquot 336 > D2EHPA > Cyanex 272. The extraction behavior of Cu(II) was established based on slope analysis method. From the results it was noticed that extraction occurs through a cation exchange mechanism with association of a mole of Cu(II) per mole of R4PSCN. The plot of log D vs. log [R4PSCN] yield a linear relationship with a slope close to 4 which is used to propose extraction reaction mechanism/ stoichiometry. The nature of complex between Cu(II) and IL was further examined using FTIR analysis of the loaded organic phase with the diluent. Mc-Cabe Thiele diagram was constructed to predict quantitative extraction of Cu(II) which revealed the need for two stages at aqueous to organic (A:O) phase volume ratio of =3:1. The stripping isotherm constructed at optimum NH4OH concentration (0.4 M) suggests the need for two stages at O:A phase volume ratio of = 2:1 for complete stripping of copper with regeneration of R4SCN for further use. Both isotherm conditions were validated by 6 cycles of counter current simulation (CCS) study for obtaining the desired amount of Cu(II) loaded R4SCN (during extraction) and/or stripped copper solution (during stripping). Overall copper enrichment was ∼6 fold leading to produce a copper(II) solution of 48 g/L from 6 g/L Cu(II). The stripped solution was subjected to crystallization study to produce copper sulphate crystals of high purity and was confirmed by XRD analysis of crystal phases.

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来源期刊
Hydrometallurgy
Hydrometallurgy 工程技术-冶金工程
CiteScore
9.50
自引率
6.40%
发文量
144
审稿时长
3.4 months
期刊介绍: Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.
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