一种高砷含量精制磷酸制备无水磷酸铁的工艺
By reacting diluted high-arsenic refined phosphoric acid with a ferric iron source to generate ferric arsenate, and then using an amorphous ferric phosphate adsorbent to adsorb the ferric arsenate, the problem of arsenic removal in the preparation of anhydrous ferric phosphate by phosphate chemical enterprises has been solved, reducing production costs and safety risks.
CN118419883BActive Publication Date: 2026-07-17YUNTU NEW ENERGY MATERIALS (JINGZHOU) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YUNTU NEW ENERGY MATERIALS (JINGZHOU) CO LTD
- Filing Date
- 2024-06-05
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
When phosphorus chemical companies use their own refined phosphoric acid to prepare anhydrous ferric phosphate, they cannot effectively remove arsenic and the cost of arsenic removal is high.
Method used
Ferric arsenate is generated by diluting refined phosphoric acid with high arsenic content and mixing it with a ferric iron source. Then, amorphous ferric phosphate is used as an adsorbent to adsorb ferric arsenate during the aging process. Subsequently, it reacts with an iron source and an oxidant to obtain anhydrous ferric phosphate with low arsenic content.
Benefits of technology
Production costs and safety can be effectively reduced without the need for expensive arsenic removal equipment, enabling the preparation of anhydrous ferric phosphate with low arsenic content.
✦ Generated by Eureka AI based on patent content.
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Abstract
本发明公开了一种高砷含量精制磷酸制备无水磷酸铁的工艺，包括以下步骤：稀释高砷含量精制磷酸，得到高砷含量稀磷酸溶液；将高砷含量稀磷酸溶液与三价铁源混合溶解，得到第一混合液；将无定型磷酸铁与第一混合液混合并进行陈化反应，固液分离后得到富砷渣和第二混合液；将第二混合液与铁源、氧化剂混合并进行加热反应，后处理得到无水磷酸铁。本发明首先利用三价铁和精制磷酸中砷酸反应生成砷酸铁，再利用无定型磷酸铁在晶核熟化过程中将砷酸铁吸附包裹，实现磷酸溶液中砷的有效去除，从而获得低砷含量的无水磷酸铁，无需投入价格昂贵的脱砷设备对自产精制磷酸进行脱砷处理，极大的降低了磷化工企业使用自产精制磷酸生产无水磷酸铁的成本。
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