Jiajie Liu, Zong Guo
To address the difficulty of efficiently removing calcium impurities from the manganese sulfate stripping solution obtained during the recycling of spent lithium batteries, this work proposed a binary synergistic extraction system. Quantum chemical calculations were used to screen the optimal combination (2A + 2B). The binding energy indicated the molecules combined with calcium are relatively more stable. Experimental optimization determined the optimal conditions as follows: 50 vol% of A, 25 vol% of B, saponification rate 60%, phase ratio (O/A) 2.5:1, and pH 6.0. In continuous extraction tank experiments, the calcium concentration decreased from 681 mg/L to 5 mg/L after a seven-stage counter-current extraction, with an extraction efficiency of about 99.3%. Infrared spectroscopy confirmed that the P=O double bond was the key functional group. This study provides an efficient and feasible technological pathway for the preparation of battery-grade manganese sulfate.
@article{a296c358-fbd2-444b-837a-d40bc30fd302,
title={2026 Liu Calcium impurity control in manganese sulfate solution},
author={Jiajie Liu and Zong Guo},
year={2026},
language={en}
}TY - JOUR TI - 2026 Liu Calcium impurity control in manganese sulfate solution AU - Jiajie Liu AU - Zong Guo PY - 2026 LA - en ER -
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