Method for producing ferroferric oxide with chemical activity

A ferric tetroxide, chemically active technology, applied in the direction of ferric oxide/ferric hydroxide, ferrous oxide, etc., can solve the problems of inability to use active substances or additives, poor discharge performance, unsatisfactory, etc. It is easy to implement industrialization, with less impurity content and good stability.

Active Publication Date: 2010-11-24
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot be used as an active substance or additive for iron electrodes and cadmium electrodes in alkaline storage batteries,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Reaction: to 1800L ferrous sulfate solution (1.245g / cm 3 , ferrous iron content is 102g / L), add 36Kg ammonium chloride in, continue to feed steam then, make reaction solution temperature keep on 94 ℃, feed compressed air and stir (control feeds the pressure of compressed air, to guarantee that solution can Tumbling is advisable), the sodium hydroxide solution that content is 145g / L is added reaction solution with spray mode, stops adding when sodium hydroxide solution sprays 1300L. Take a sample to detect the content of ferrous iron in the reaction solution. After testing, the content of ferrous iron is 16.8g / L. Continue to spray 180L of sodium hydroxide solution and stop. Sampling again detects the content of ferrous iron in the reaction solution. At this time, the content of ferrous iron 6.5g / L, stop adding sodium hydroxide solution, add 6.3Kg acetylene black to the reaction solution, continue to react for 30min, then stop steam heating, and reduce the compressed ...

Embodiment 2

[0039] (1) Reaction: to 1800L ferrous sulfate solution (1.24g / cm 3 , ferrous iron content is 100g / L), add 36Kg ammonium chloride in, continue to feed steam then, make reaction solution temperature keep on 96 ℃, feed compressed air and stir (control feeds the pressure of compressed air, to ensure that the solution can Tumbling is advisable), the sodium hydroxide solution that content is 154g / L is added ferrous sulfate solution with spray mode and reacts, and stops adding when sodium hydroxide solution sprays 1300L. Take a sample to detect the content of ferrous iron in the reaction solution. After testing, the content of ferrous iron is 14.8g / L. Continue to spray 150L of sodium hydroxide solution and stop. Sampling again detects the content of ferrous iron in the reaction solution. At this time, the content of ferrous iron 6.1g / L, stop adding sodium hydroxide solution, add 6.1Kg acetylene black to the reaction solution, continue to react for 30min, then stop steam heating, and ...

Embodiment 3

[0046] (1) Reaction: to 1800L ferrous sulfate solution (1.25g / cm 3 , ferrous iron content is 103g / L), add 36Kg ammonium chloride in, continue to feed steam then, make reaction solution temperature keep on 95 ℃, feed compressed air and stir (control feeds the pressure of compressed air, to ensure that the solution can churning is advisable), the sodium hydroxide solution that content is 154g / L is added ferrous sulfate solution with spray mode and reacts, and stop adding when sodium hydroxide solution sprays 1300L, ferrous iron content in the sampling detection reaction solution, through Detect that the content of ferrous iron is 14.1g / L, continue to spray 120L of sodium hydroxide solution and stop, take another sample to detect the content of ferrous iron in the reaction solution, at this time the content of ferrous iron is 6.3g / L, stop adding sodium hydroxide Solution, add 6.2Kg acetylene black to the reaction solution, continue to react for 30 minutes, then stop steam heating...

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Abstract

The invention belongs to the technical field of methods for producing ferroferric oxide, and particularly relates to a method for producing ferroferric oxide with chemical activity. The invention aims to provide the method for producing the ferroferric oxide with chemical activity. The method comprises the following steps of: (1) adding strong acid ammonium salt in an amount which is 0.35 to 0.40mol/L ammonium content of the reaction solution into ferrous sulfate solution, heating the solution and mixing the solution uniformly; (2) adding sodium hydroxide solution into the reaction solution to control the ferrous content of the reaction solution at 3 to 9g/L, then adding a catalytic reducing agent in an amount which is 4 to 5 percent of the weight of the ferrous iron in the reaction solution into the solution, and continuously reacting the solution for 20 to 40 minutes; (3) performing filtration, washing and drying to obtain solid; and (4) after the solid obtained in the step (3) is crushed, conveying the crushed solid into a reduction furnace and reducing the solid to obtain the ferroferric oxide with chemical activity. The ferroferric oxide produced by the method has high chemical activity, low impurity content and good stability, and is convenient for industrialized implementation.

Description

technical field [0001] The invention belongs to the technical field of production methods of ferric oxide, in particular to a production method of chemically active ferric oxide. Background technique [0002] Fe3iron tetroxide has been widely used as functional materials, magnetic recording materials, battery active materials, special catalyst raw materials, magnetic pigments, etc. due to its easy-to-obtain raw materials and low price. At present, the preparation method of ferroferric oxide is traditional hydrolysis method or direct synthesis method. The hydrolysis method uses ferrous sulfate to react with alkaline substances to generate ferric hydroxide, which is hydrolyzed into ferric oxide. The direct synthesis method uses hydrogen Ferrous oxide and ferric oxide directly undergo addition reaction at a certain temperature and pH value to generate ferric oxide. Whether it is prepared by the hydrolysis method or the direct synthesis method, the ferroferric oxide has no chem...

Claims

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Application Information

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IPC IPC(8): C01G49/08
Inventor 刘明章郭圣文蒲美杨飞霞
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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