一种湿法磷酸中砷的分离及利用方法
By adding an inducing crystallizer and an arsenic removal agent to wet-process phosphoric acid and controlling the reaction conditions, arsenic sulfide is dissolved and crystallized, solving the problem of arsenic separation and utilization, achieving the extraction of high-purity arsenic sulfide, and improving the quality of phosphoric acid products.
CN121376927BActive Publication Date: 2026-07-17YUNNAN PHOSPHATE CHEM GROUP CORP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YUNNAN PHOSPHATE CHEM GROUP CORP
- Filing Date
- 2025-11-10
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies cannot effectively separate and utilize arsenic in wet-process phosphoric acid, leading to a continuous increase in arsenic content, which seriously threatens the quality of phosphoric acid and subsequent products.
Method used
By adding an inducing crystallizer and an arsenic removal agent, controlling the reaction conditions, and using a method of dissolving and then crystallizing, arsenic sulfide is separated and purified to form large-particle arsenic sulfide precipitates.
Benefits of technology
It significantly increases the particle size of arsenic sulfide, reduces fine particles, directly yields high-purity arsenic sulfide products, avoids the formation of arsenic slag, and improves the quality of phosphoric acid.
✦ Generated by Eureka AI based on patent content.
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Abstract
本发明涉及湿法磷酸净化技术领域，公开了一种湿法磷酸中砷的分离及利用方法，包括下列步骤：首先将湿法磷酸澄清，上清液送入脱砷反应槽；配制诱导结晶剂与脱砷剂，先向反应槽中加入诱导结晶剂，然后再加入脱砷剂进行反应，得到脱砷磷酸A；随后将其加热溶解，再降温养晶，得到脱砷磷酸C；过滤后获得脱砷磷酸和硫化砷沉淀；沉淀经洗涤、烘干，得到硫化砷产品；本发明通过诱导结晶剂结合溶解‑再结晶工艺，使析出的硫化砷附着于诱导结晶剂并生长为易过滤的大颗粒沉淀，实现了砷的选择性分离，避免了含砷废渣的产生；同时，将分离出的砷直接转化为高纯度的硫化砷产品，实现了砷的资源化利用。
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