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Iron phosphate synthesizing process and device

A technology of iron phosphate and process, applied in the direction of phosphorus compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of low degree of automation, single oxidant pH value regulator, etc., achieve high automation, wide selection range, and reduce labor costs Effect

Active Publication Date: 2019-05-10
博创宏远新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferric phosphate synthesis process, currently commonly used process and equipment, low degree of automation
And the raw material oxidant and PH value regulator of the common process are single

Method used

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  • Iron phosphate synthesizing process and device
  • Iron phosphate synthesizing process and device
  • Iron phosphate synthesizing process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Adopt above-mentioned device to synthesize ferric phosphate, process is as follows:

[0031] Oxidation reaction: select iron solution with iron ion concentration of 1.2mol / L, phosphate radical concentration of 1.22mol / L, and sulfate radical concentration of 1.2mol / L (most of the ferrous ions in the iron raw materials are oxidized to trivalent iron ions in the natural state , there is only a small amount of ferrous ions, and the total concentration of ferrous ions and ferric ions here is 1.2mol / L), and 11000kg of iron solution is transported by the iron solution feeder and passed through the flow detector 5 and the third solenoid valve 6 Quantitatively enter the oxidation kettle 1, and start stirring at the same time, transported by the oxidant feeder and through the flow detector 5 and the third solenoid valve 6, quantitatively and slowly add 964kg hydrogen peroxide into the oxidation kettle 1, the hydrogen peroxide feeding time is 60 minutes, and pass through the oxidat...

Embodiment 2

[0036] Adopt above-mentioned device to synthesize ferric phosphate, process is as follows:

[0037] Oxidation reaction: select an iron solution with an iron ion concentration of 1.3mol / L (here, the total concentration of ferrous ions and ferric ions is 1.3mol / L), a phosphate concentration of 1.32mol / L, and a sulfate concentration of 1.3mol / L , 8800kg of iron solution is transported by the iron solution feeder and quantitatively enters the oxidation kettle 1 through the flow detector 5 and the third electromagnetic valve 6, and at the same time, the stirring is started, and it is delivered by the oxidant feeder and passed through the flow detector 5 and the third solenoid valve. Solenoid valve 6 quantitatively and slowly adds 900 kg of hydrogen peroxide into the oxidation kettle 1, the hydrogen peroxide feeding time is 60 minutes, and the oxidation temperature in the oxidation kettle 1 is controlled by passing fluid into the first heat exchange interlayer 18 outside the oxidatio...

Embodiment 3

[0041] Adopt above-mentioned device to synthesize ferric phosphate, process is as follows:

[0042] Oxidation reaction: select iron solution with iron ion concentration of 1mol / L (here, the total concentration of ferrous ion and ferric ion is 1mol / L), phosphate concentration of 0.52mol / L, sulfate concentration of 1mol / L, and 5500kg The iron solution is delivered by the iron solution feeder and quantitatively enters the oxidation kettle 1 through the flow detector 5 and the third electromagnetic valve 6, and at the same time, the stirring is started, and it is delivered by the oxidant feeder and passes through the flow detector 5 and the third electromagnetic valve 6 Slowly add 433 kg of hydrogen peroxide quantitatively into the oxidation kettle 1, the hydrogen peroxide feeding time is 30 minutes, and control the oxidation temperature in the oxidation kettle 1 by passing hot fluid into the first heat exchange interlayer 18 outside the oxidation kettle 1 to ≤70°C (here the oxidat...

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Abstract

The invention discloses an iron phosphate synthesizing process and device. The iron phosphate synthesizing process includes: adding an iron solution containing ferrous ions into an oxidation kettle, stirring at the same time, adding an oxidizing agent into the oxidation kettle, controlling the temperature of the solution in the oxidation kettle to be not larger than 70 DEG C, and acquiring an oxidized iron solution after the fact that the solution in the oxidation kettle does not contain the ferrous ions is detected; conveying the oxidized iron solution in the oxidization kettle into a precipitation kettle through an oxidation kettle discharge pump, stirring at the same time, slowly adding a pH regulator into the precipitation kettle to control the pH of the solution in the precipitation kettle to be 1.0-2.5, rising the temperature to 90-95 DEG C after the pH regulation to perform iron phosphate crystal form conversion reaction for 1-4 hours, and then pumping out the iron phosphate suspension in the precipitation kettle after the reaction. The iron phosphate synthesizing process has the advantages that various types of oxidizing agents and pH regulators can be selected, wide raw material selection range is achieved, process equipment is high in automation level, and automatic temperature control, automatic feeding control and automatic pressure alarm can be achieved.

Description

technical field [0001] The application relates to a process and device for synthesizing iron phosphate. Background technique [0002] Iron phosphate is one of the main raw materials for the preparation of lithium iron phosphate, a cathode material for lithium batteries. As the key material of lithium-ion batteries, lithium iron phosphate cathode material has the advantages of high safety, low cost and long life. Ferric phosphate synthesis process, currently commonly used process and equipment, has a low degree of automation. And the raw material oxidizing agent of common process, pH value adjusting agent is single. [0003] Due to the above problems, it is necessary to propose a ferric phosphate synthesis process and equipment with a high degree of automation, full control of process parameters, and a wide range of raw materials. Contents of the invention [0004] In view of the above-mentioned technical problems existing in the prior art, the purpose of this applicatio...

Claims

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Application Information

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IPC IPC(8): C01B25/37
Inventor 江文革方东东
Owner 博创宏远新材料有限公司
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