Scholarlink

Abstract <p>The applicability of organophosphorus extractants (D2EHPA, P-507, and Cyanex 272) for the selective separation of Mn, Co, Ni, and Li from the succinic acid leach liquor of cathode material of spent lithium-ion batteries (LIBs) was investigated. Extractant P-507 exhibited superior selectivity in separating Mn from Ni and Li, with separation factors of βMn/Ni = 145.2 and βMn/Li = 130.0, surpassing D2EHPA (71.0 and 70.5). Slope analysis and infrared spectroscopy indicated that Mn extraction by P-507 proceeds via a cation exchange mechanism, while succinic acid acts as a buffer and stabilizes the equilibrium pH. Optimization of process parameters revealed that the concentration of P-507 in the diluent affects Mn recovery and its separation from Ni and Li, whereas temperature and contact time have negligible effects. Scrubbing of the loaded organic phase with 6 g L<sup>–1</sup> MnSO<sub>4</sub> removed 60% of Co and 98% of Ni/Li. Mn stripping exceeding 97% was achieved in a single stage using 50 g L<sup>–1</sup> H<sub>2</sub>SO<sub>4</sub> at an O : A ratio of 2 : 1. These results confirm the potential of P-507 for the development of sustainable metal recovery technology from secondary sources.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Manganese Recovery from Succinic Acid Leach Liquor of Spent Lithium-Ion Batteries Black Powder by Solvent Extraction

  • 期刊论文

  • 发表日期：

    2025年10月1日

查看全文
  • I. Dedyukhin,
  • E. Kirillov,
  • S. Kirillov,
  • V. Rychkov,
  • G. Bunkov

摘要

Abstract

The applicability of organophosphorus extractants (D2EHPA, P-507, and Cyanex 272) for the selective separation of Mn, Co, Ni, and Li from the succinic acid leach liquor of cathode material of spent lithium-ion batteries (LIBs) was investigated. Extractant P-507 exhibited superior selectivity in separating Mn from Ni and Li, with separation factors of βMn/Ni = 145.2 and βMn/Li = 130.0, surpassing D2EHPA (71.0 and 70.5). Slope analysis and infrared spectroscopy indicated that Mn extraction by P-507 proceeds via a cation exchange mechanism, while succinic acid acts as a buffer and stabilizes the equilibrium pH. Optimization of process parameters revealed that the concentration of P-507 in the diluent affects Mn recovery and its separation from Ni and Li, whereas temperature and contact time have negligible effects. Scrubbing of the loaded organic phase with 6 g L–1 MnSO4 removed 60% of Co and 98% of Ni/Li. Mn stripping exceeding 97% was achieved in a single stage using 50 g L–1 H2SO4 at an O : A ratio of 2 : 1. These results confirm the potential of P-507 for the development of sustainable metal recovery technology from secondary sources.