Application of saponified D2EHPA for the selective extraction of manganese from spend lithium-ion batteries

被引：32
作者：
Keller, A. [1 ]
Hlawitschka, M. W. [2 ]
Bart, H-J [1 ]
机构：
[1] Tech Univ Kaiserslautern, Chair Separat Sci & Technol, Kaiserslautern, Germany
[2] Johannes Kepler Univ Linz, Inst Proc Engn, Linz, Austria
来源：
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2022年 / 171卷
关键词：
Solvent extraction; Recycling of lithium-ion batteries; Manganese recovery; Saponified D2EHPA; Equilibrium study; ACID LEACHING LIQUOR; HYDROMETALLURGICAL PROCESS; METAL VALUES; RECOVERY;
D O I：
10.1016/j.cep.2021.108552
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Solvent extraction is used for the selective extraction of manganese from an industrial leaching solution based on active material from spent lithium-ion batteries. As solvent 100 g L-1 di-(2-ethylhexyl) phosphoric acid (D2EHPA) diluted in Isopar L and an addition of 5 vol% tributyl phosphate is used. D2EHPA is well studied for the separation of manganese from cobalt and nickel but no data can be found on the influence of saponification. The influence of the saponification degree on the extraction yield and selectivity is investigated for two extraction stages. An overall extraction yield of 98.7% is achieved. 40% saponified D2EHPA for the first and 20% for the second stage at a phase ratio of 2.33 shows the best performance in terms of extraction yield and selectivity. The saponification influences the pH shift during the extraction from initial 2.8 to 3.4.
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页数：8
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