ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Qiyuan Zheng,Zuoying Cao,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Guiqing Zhang
Direct extraction of Ni(II) from Fe(III), Al(III), Ca(II), Mg(II), and Mn(II) is a bottleneck issue in the hydrometallurgy processes of laterite-nickel ore, spent batteries, and other secondary sources. One of the biggest challenges in achieving direct extraction of Ni(II) is the lack of stable and efficient extractants. Hence, a novel bipyridine extractant MSL211 was designed and synthesized in this paper. With its strong steric resistance and electrostatic interaction, MSL211 can form a stable eight-membered chelating ring with Ni(II), thereby having a high bonding ability toward Ni(II). Therefore, based on the high bonding ability of MSL211 toward Ni(II) and the low extraction capacity of DNNSA for Fe(III), an efficient synergistic extraction system of DNNSA-MSL211 was proposed. The synergistic extraction system of DNNSA-MSL211 realizes direct extraction of Ni(II) from Fe(III), Al(III), Ca(II), Mg(II), and Mn(II) without neutralization, precipitation, and solid/liquid separation processes, which are inevitable but problematic processes in the current hydrometallurgy processes for removing Fe(III), Al(III), and Mn(II). The effects of the molar ratios of DNNSA:MSL211, shaking time, temperature, O/A ratios, and equilibrium pH on the extraction behavior of Ni(II) were investigated. Under optimum conditions, the extraction efficiency of Ni(II) was as high as 97.62%, and the separation coefficient of Ni(II) over all impurities was greater than 400. To elucidate the mechanism of the high selectivity of DNNSA-MSL211 toward Ni(II), DFT calculations were carried out to calculate the binding energy (ΔE) and Gibbs free energy (ΔG(ext)) of the extraction process. Furthermore, this paper investigated the entire ″extraction-stripping″ process, demonstrating that the synergistic extraction system of DNNSA-MSL211 avoids neutralization, precipitation, and solid/liquid separation processes, minimizes hazardous waste generation, and shortens process flow while meeting the objectives of sustainable and clean production.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
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IF 3.7
Bharat Prasad Sharma,Tianzhang Wang,Yufeng Liang,Jinping Xiong,Liangrong Yang,Zheng Li
Simultaneous recovery of Ni and Co from Fe(III) and Al is a critical challenge in hydrometallurgical processes. Recognized solvent extraction systems often struggle with selectivity and effective performance in mixed metal ion environments. Herein, a new synergistic solvent extraction (SSX) system comprised of a novel pyridine analog, N,N -bis(pyridin-2-ylmethyl) dodecan-1-amine (BPMDA), and dinonylnaphthalene sulfonic acid (DNNSA) with tributyl phosphate as phase modifier is introduced. The SSX system demonstrates high extraction performance achieving >90% for Ni and >97% for Co in a single-stage extraction process, with high selectivity. Under optimal conditions, the selectivity sequence is observed as Co 2+ (>97%) > Ni 2+ (>90%) > Mn 2+ (<20%) > Fe 3+ (<10%) > Mg 2+ (<5%) > Al 3+ (<2%) > Ca 2+ (<1%). Spectroscopic analysis evidences the preferential binding of BPMDA with Ni and Co in the presence of DNNSA, concurrently achieving a significant reduction in the co-extraction of Fe(III) and Al. The selective complexation of Ni and Co using the SSX system offers a highly efficient and selective approach for their extraction, with promising potential for applications in recovery-based processes.
研究领域:
冶金化学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
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IF 3.9
Qiyuan Zheng,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Zuoying Cao,Guiqing Zhang
Developing a novel extraction process for battery minerals-nickel laterites is a key aspect of building a resilient and low-carbon future, as the current process produces heavy metal residues, electrolytic wastewater, and toxic gases, while also facing issues of long process flow and low resource utilization. The primary bottlenecks in the process stem from the low separation coefficients and poor selectivity of commercial extractants. In this paper, a novel synergistic solvent extraction (SSX) system, dinonylnaphthalenesulfonic acid (DNNSA)-N,N-bis(pyridin-2-ylmethyl)tetradecan-1-amine (NNPA), has been proposed to address the bottlenecks. Based on the DNNSA-NNPA SSX system, a novel hydrometallurgical process has been proposed for the stepwise extraction of valuable metals from nickel laterites. In the proposed process, Cu, Ni, Co, and Zn were directly extracted from the nickel laterite leachate, reducing their concentrations to below 1 mg/L. The enriched metals were subsequently separated as CuSO4, NiSO4, CoSO4, and ZnSO4 solutions, each with a purity exceeding 99.9%. Thereafter, Cr, Fe(III), and Al were sequentially removed from the raffinate through stepwise precipitation, achieving their preliminary separation. Mn was then selectively extracted from the resulting precipitate–mother liquor, yielding a high-purity MnSO4 solution (>99.9%). This integrated approach enables the comprehensive resource extraction of nickel laterites. Systematic mechanistic studies and pilot plant tests demonstrate that the novel extraction process significantly improves metal ion separation coefficients, avoids coprecipitation losses of Ni and Co, simplifies the process flow, avoids hazardous waste generation, reduces energy consumption, and improves resource utilization.
✓ 已验证
DOI
高影响因子
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