Jiyao Wang, Yifan Shi
The increasing demand for high-purity lead sulfide (PbS) for optoelectronic applications necessitates efficient methods to remove residual antimony sulfide (Sb2S3) from complex ores—a challenge due to their chemical similarity and fine intergrowth. This study presents a hybrid purification strategy combining vacuum distillation pretreatment with oxygen-free alkaline selective leaching. Thermodynamic analysis using Eh-pH diagrams revealed significant differences in the behavior of trace Sb2S3 and bulk PbS under alkaline conditions (pH 9–11), identifying a suitable window for selective dissolution. The process begins with mechanical ball milling to break Sb2S3 inclusions and improve reaction kinetics, followed by anaerobic leaching in a sealed reactor under inert atmosphere using a NaOH solution at a controlled potential (Eh 0.1–0.35 V vs. SHE). Multiple characterization techniques confirmed that Sb2S3 undergoes dissolution and conversion while the PbS phase remains intact.
@article{a729f57d-ec29-4019-8b64-7ac38a494fe9,
title={2026 Wang Alkaline Antimony Removal from Lead Antimony Sulfides},
author={Jiyao Wang and Yifan Shi},
year={2026},
language={en}
}TY - JOUR TI - 2026 Wang Alkaline Antimony Removal from Lead Antimony Sulfides AU - Jiyao Wang AU - Yifan Shi PY - 2026 LA - en ER -
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