Method for producing battery grade iron phosphate

A production method and technology of iron phosphate, applied in the direction of battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of high manufacturing difficulty, high production difficulty, and high cost, and achieve the goals of reducing production costs, improving purity, and saving production materials Effect

Inactive Publication Date: 2015-05-20
HONGYA YAXING BIOTECH
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Problems solved by technology

[0002] Battery-grade iron phosphate is a high-purity iron phosphate product. Due to its very high process standards, it is difficult to manufacture and the process is quite complicated. The iron phosphate produced by most domestic manufacturers can only be used as ceramic grade ferric phosphate
[0003] At present, the production of battery-grade iron phosphate in the industry mainly adopts the method of dropping trisodium phosphate solution in ferric chloride or ferric sulfate solution, generating ferric phosphate precipitation through displacement reaction, and then washing the precipitate with

Method used

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  • Method for producing battery grade iron phosphate
  • Method for producing battery grade iron phosphate
  • Method for producing battery grade iron phosphate

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Embodiment 1

[0016] (1) the following is the implementation process that adopts the inventive method to obtain ferric phosphate:

[0017] Add 300KG-600KG of 30-40% ferric chloride solution with a purity greater than 98% in a 3000L reactor, then add 1000L of pure water, then heat up to 85-100°C and keep warm, after that, Slowly add 20-30% monosodium phosphate solution with a purity greater than 99%. The amount of monosodium phosphate added is 3-3.5 times the molar amount of ferric chloride, and the addition time is controlled within 1-2 hours. After the addition of the materials is completed, After 20-60 minutes of heat preservation reaction, the slurry is obtained, and the slurry is subjected to centrifugation to obtain solid and mother liquor. The solid is added to a 1000L reaction kettle, and then 800L of pure water is added to stir for 30-60 minutes, and then centrifuged to obtain The solids were repeatedly washed 4 times according to the above steps, and finally dried and sieved to obt...

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Abstract

The invention discloses a method for producing battery grade iron phosphate. The method comprises the steps of adding a ferric trichloride solution into a reactor, adding a monosodium phosphate solution, then performing thermal reaction to obtain slurry, performing centrifugal separation on the slurry to obtain a solid and a mother solution, washing repeatedly, and drying and sieving the solid to obtain the battery grade iron phosphate. The method can well solve a phenomenon that precipitated iron phosphate is packaged by other matters; and ferric hydroxide precipitate is generated in the production process, so that the purity of the product can be effectively improved and the production difficulty is reduced.

Description

technical field [0001] The invention relates to a method for manufacturing electrode materials, and discloses a method for producing battery-grade iron phosphate. Background technique [0002] Battery-grade iron phosphate is a high-purity iron phosphate product. Due to its very high process standards, it is difficult to manufacture and the process is quite complicated. The iron phosphate produced by most domestic manufacturers can only be used as Ceramic grade iron phosphate is used. [0003] At present, the production of battery-grade iron phosphate in the industry mainly adopts the method of dropping trisodium phosphate solution in ferric chloride or ferric sulfate solution, generating ferric phosphate precipitation through displacement reaction, and then washing the precipitate with pure water to obtain the finished product of ferric phosphate , the main defect of this method is that trisodium phosphate is too alkaline and reacts rapidly with ferric chloride, and the pre...

Claims

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Application Information

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IPC IPC(8): C01B25/37H01M4/58
CPCY02E60/10
Inventor 鲜君
Owner HONGYA YAXING BIOTECH
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