Process for producing iron phosphate

A technology of iron phosphate and phosphoric acid, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of complex process, difficult component control, high production cost, etc., and achieve the effect of simple equipment, low energy consumption and low cost

Inactive Publication Date: 2009-09-16
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The industrial ferric phosphate production method is formed by the reaction of ferrite and phosphate at high temperature, which has the disadvantages of high production cost, complicated process, and difficult component control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Taking ferric oxide and phosphoric acid as raw materials, the molar ratio of iron ions in ferric oxide and phosphate radicals in phosphoric acid is 0.90: 1, and glucose is used as a catalyst, and its quality is 1% of the iron mass in ferric oxide. Ferric oxide, phosphoric acid and glucose were mixed and reacted at 80°C for 120min. The chemical formula obtained is Fe 0.90 PO 4 of iron phosphate.

Embodiment 2

[0018] Taking ferrous oxide and phosphoric acid as raw materials, the mol ratio of iron ion in ferrous oxide and the phosphate radical in phosphoric acid is 0.95: 1, with sucrose as catalyst, its quality is 5% of iron quality in ferrous oxide, ferrous oxide, Phosphoric acid and sucrose were mixed and reacted at 100°C for 80 minutes. The chemical formula obtained is Fe 0.95 PO 4 of iron phosphate.

Embodiment 3

[0020] With ferric oxide and phosphoric acid as raw materials, the molar ratio of iron ion in ferric oxide and phosphate radical in phosphoric acid is 1: 1, and starch is used as catalyst, and its quality is 10% of iron quality in ferric oxide. Ferric oxide, phosphoric acid and starch were mixed and reacted at 140°C for 40 minutes. The chemical formula obtained is FePO 4 of iron phosphate.

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PUM

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Abstract

The invention relates to a preparation method of iron phosphate. The current iron phosphate production method has disadvantages such as complex process, high production cost, and difficulty in component control. The present invention uses iron source compound and phosphoric acid as raw material, and simple organic matter as catalyst, mixes raw material and catalyst, and reacts at 80°C-160°C for 20 minutes to 2 hours to synthesize iron phosphate with chemical formula FexPO4, wherein 0.90 ≤x≤1.10. The raw materials and catalysts used in the method of the invention are common chemical raw materials, and the reaction is carried out at relatively low temperature and normal pressure. The required equipment is simple and the energy consumption is small, so the cost of the product is relatively low. Because the reaction is carried out at low temperature, the volatilization of elements is avoided, and the composition of the product is easy to control.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a preparation method of iron phosphate. technical background [0002] Ferric phosphate is a widely used chemical raw material, which can be used as a food thickener and iron supplement, and can also be used in pigments, ceramics and metal glazes. In recent years, iron phosphate has been used as a raw material for the production of lithium iron phosphate, the cathode material of lithium-ion batteries, and has important utilization value. [0003] Iron oxide is a compound with stable properties, and its activity is related to the degree of aging. The longer the aging, the more stable its chemical properties. Industrialized iron oxide is aged for a long time, so its performance is stable, and it is difficult to react with phosphoric acid under normal performance conditions. The newly formed iron oxide can react with phosphoric acid under acidic conditions. Phosphoric ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/37
Inventor 倪华良糜裕宏季振国
Owner HANGZHOU DIANZI UNIV
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