Preparation method of ferric phosphate and product thereof

A technology of iron phosphate and phosphoric acid, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as hidden dangers in production, and achieve the effect of improving the operating environment and mild properties

Active Publication Date: 2010-12-15
铜陵纳源材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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  • Preparation method of ferric phosphate and product thereof
  • Preparation method of ferric phosphate and product thereof
  • Preparation method of ferric phosphate and product thereof

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[0013] A kind of preparation method of ferric phosphate of the present invention, its step is:

[0014] (a), into the acid-resistant reactor with a metering pump into the ferric source solution, then add a certain dose of phosphoric acid solution, and stir for 1 hour;

[0015] (b), adding a certain dose of organic solvent into the acid-resistant reaction kettle, and aging at 15-98° C. for 0.5-24 hours;

[0016] (c), the obtained ferric phosphate slurry is washed with water, filtered, and spray-dried to obtain the final ferric phosphate product;

[0017] Wherein the weight ratio of water, iron, phosphoric acid and organic solvent is: 100:1-20:1-30:1-500.

[0018] The ferric iron source solution in step (a) can be replaced by a ferrous iron source solution and an oxidizing agent.

[0019] The concentrations of the ferrous iron source solution and the ferric iron source solution are 0.01˜3 mol / L.

[0020] The ferric iron source is at least one of ferric sulfate, ferric chlorid...

Embodiment 1

[0029] In the reaction kettle, configure 0.05mol / L ferrous sulfate solution, add 0.55mol / L phosphoric acid solution to the reaction kettle, then add 0.5mol / L hydrogen peroxide to the reaction kettle, the reaction temperature is 15°C, and finally add Add 0.5mol / L ethanol solution to the system, age for 2 hours, and obtain iron phosphate (FePO 4 2H 2 o) Products.

Embodiment 2

[0031] In the reaction kettle, configure 0.05mol / L ferric sulfate solution, add 0.5mol / L phosphoric acid solution to the reaction kettle, the reaction temperature is 15°C, finally add 0.5mol / L ethanol solution to the system, and age for 2 hours , after filtration, washing, drying and other treatments, iron phosphate (FePO 4 2H 2 o) Products.

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Abstract

The invention discloses a preparation method of ferric phosphate and a product thereof. The preparation method comprises the following steps of: (1) introducing a ferric iron source solution into an acid resistant reaction kettle by using a metering pump, and then adding a certain dosage of phosphoric acid solution and stirring for 1h; (b) adding a certain dosage of organic solvent to the acid resistant reaction kettle, and preserving heat at 15-98 DEG C and aging for 0.5-24h; and (c) carrying out washing, filtering and spray drying on the obtained ferric phosphate slurry to obtain a final ferric phosphate product, wherein the proportion by weight of the water to the iron to the phosphoric acid to the organic solvent is 100:1-20:1-30:1-500. In the method, the traditional alkali is replaced by the organic solvent to prepare the ferric phosphate; and because the organic solvent has milder property and no harm to the human body, and the operating environment is beneficially improved after mass production. The ferric phosphate of two different crystal forms of amorphism and orthorhombic systems can be prepared by adopting the method.

Description

technical field [0001] The invention relates to a method for preparing iron phosphate and a product thereof, and belongs to the technical field of preparation of cathode materials for lithium ion batteries. Background technique [0002] Ferric phosphate is a chemical raw material with a wide range of uses. It can be used as an iron supplement for food, as well as pigments, catalysts for organic synthesis, and ceramic and metal glazes. In recent years, iron phosphate has been used as a high-quality raw material for lithium iron phosphate, the cathode material of lithium-ion batteries, and has important application value. The existing preparation methods of ferric phosphate are: (1) high temperature roasting method, burning basic ferric ammonium phosphate at 550-700°C to obtain ferric phosphate; (2) solution precipitation method, adding iron source and phosphorus source to the reaction The reaction is carried out in the kettle. By adjusting the pH of the system, the system pr...

Claims

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Application Information

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IPC IPC(8): C01B25/37H01M4/58H01M4/1397
CPCY02E60/122Y02E60/10
Inventor 骆艳华裴晓东陈思学王凡佘世杰
Owner 铜陵纳源材料科技有限公司
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