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<p>Rhenium, a high-value strategic metal, is vital for advanced alloys and catalysis. Copper smelting waste acid (CSWA) is a key secondary source for rhenium recovery, which drive research focus. This paper reviewed technical challenges in rhenium extraction from CSWA. Solvent extraction (e.g., N235 achieved &gt; 99% efficiency), ion exchange (weak-base resins like ZS70 maintained 97% recovery after 960 BV), and adsorption (Schiff base-modified silica adsorbed 198.77&#xa0;mg/g) are analyzed. Emerging deep eutectic solvents (DESs) show ~ 100% extraction with low toxicity, outperforming traditional methods. A comparative assessment highlights method-specific efficiencies and limitations, proposing future research directions for optimized rhenium recovery.</p> Graphical Abstract <p></p>

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Advances and Challenges in Rhenium Recovery from Copper Smelting Dirty Acid: Solvent Extraction, Ion Exchange, and Adsorption

  • 期刊论文

  • 发表日期：

    2025年12月13日

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  • Zhaobo Liu,
  • Shuaiyin Shi,
  • Yan-Lin Li,
  • Hai Liu,
  • Jun Liu

摘要

Rhenium, a high-value strategic metal, is vital for advanced alloys and catalysis. Copper smelting waste acid (CSWA) is a key secondary source for rhenium recovery, which drive research focus. This paper reviewed technical challenges in rhenium extraction from CSWA. Solvent extraction (e.g., N235 achieved > 99% efficiency), ion exchange (weak-base resins like ZS70 maintained 97% recovery after 960 BV), and adsorption (Schiff base-modified silica adsorbed 198.77 mg/g) are analyzed. Emerging deep eutectic solvents (DESs) show ~ 100% extraction with low toxicity, outperforming traditional methods. A comparative assessment highlights method-specific efficiencies and limitations, proposing future research directions for optimized rhenium recovery.

Graphical Abstract