PROCESS FOR PREPARING FERRIC PHOSPHATE FROM IRON-CONTAINING WASTE
A novel process for preparing ferric phosphate from iron-containing waste using a controlled liquid-phase reaction and pH adjustment achieves high purity and uniformity, addressing impurity issues in existing methods and enhancing environmental sustainability.
FR3126972B1Active Publication Date: 2026-06-26GUIZHOU CHANHEN CHEM CO LTD
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- GUIZHOU CHANHEN CHEM CO LTD
- Filing Date
- 2022-08-10
- Publication Date
- 2026-06-26
Smart Images
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Abstract
The invention relates to a process for preparing ferric phosphate from iron-containing waste, the process comprising: a) supplying a mixture solution containing ferric chloride obtained by the acidolysis of iron-containing waste; b) adjusting the pH of the mixture solution containing ferric chloride so that 0 < pH ≤ 2 and the Fe3+ concentration is 10 to 80 g / L with an alkali compound and water, to obtain an iron source solution; c) mixing and reacting the iron source solution obtained in step b) with a calcium dihydrogen phosphate solution at a P / Fe molar ratio of 1:1 to 1.8, to obtain a suspension having a pH of 0.2 to 2; and d) carrying out aging and crystallization on the suspension, to obtain ferric phosphate. Abstract figure: Fig. 1
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