Separation of trace amount of nickel from cobalt sulphate solutions using a synergistic solvent extraction system consisting of dinonylnaphthalene sulfonic acid (DNNSA) and decyl 4-picolinate (4PC)

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Hydrometallurgy Pub Date : 2024-03-03 DOI:10.1016/j.hydromet.2024.106288

Shiyu Xiao , Li Zeng , Xinsheng Wu , Wenjuan Guan , Yixiong Chen , Shengxi Wu , Qinggang Li , Zuoying Cao , Mingyu Wang , Guiqing Zhang

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引用次数: 0

Abstract

The current methods for separation of nickel from cobalt sulphate solutions have drawbacks of long flowsheets, release of large volumes of wastewater and incomplete separation of two metals. A synergistic solvent extraction (SSX) system consisting of dinonylnaphthalene sulfonic acid (DNNSA) and decyl 4-picolinate (4PC) is proposed in this work to extract nickel from cobalt sulphate solutions selectively. The extraction of nickel reached 99.7% after five-stage counter current extraction with an A/O volume ratio of 1/6 at 30 °C, resulting in a large increase of Co/Ni mass ratio to 25,700 in raffinate from 56 in feed. The loaded organic phase can be easily stripped using a dilute H₂SO₄ solution. Application of this process in industry is expected to make an important impact on the production of high-purity cobalt sulphate solutions and to deliver economic benefits.

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使用由二壬基萘磺酸（DNNSA）和 4-吡啶甲酸癸酯（4PC）组成的协同溶剂萃取系统从硫酸钴溶液中分离痕量镍

目前从硫酸钴溶液中分离镍的方法存在流程长、排放大量废水以及两种金属分离不彻底等缺点。本研究提出了一种由二壬基萘磺酸（DNNSA）和 4-吡啶甲酸癸酯（4PC）组成的协同溶剂萃取（SSX）系统，可选择性地从硫酸钴溶液中提取镍。在 30 °C、A/O 体积比为 1/6 的条件下，经过五级逆流萃取，镍的萃取率达到 99.7%，从而使钴/镍的质量比从进料中的 56%大幅提高到废液中的 25 700%。使用稀释的 HSO 溶液可以很容易地剥离负载的有机相。该工艺在工业中的应用有望对高纯度硫酸钴溶液的生产产生重要影响，并带来经济效益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.