Method for preparing magnetic oxide iron and magnetic oxide iron desulfurizer prepared thereby

A technology of magnetic iron oxide and desulfurizer, applied in the direction of iron oxide/hydroxide, etc., can solve the problems of undisclosed and undisclosed preparation methods of magnetic iron oxide, and achieve the effect of improving stability

Active Publication Date: 2009-11-25
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the iron-based desulfurizers of the prior art, the use of magnetic iron oxide Fe 21.333 o 32 As the m

Method used

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  • Method for preparing magnetic oxide iron and magnetic oxide iron desulfurizer prepared thereby

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 32g of ferrous sulfate powder and 12g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.8; put the above mixed material into a kneader, and knead for 3 hours to complete the solidification between the above reactants. Reaction, then the above reaction product is placed in the air to dry, in order to facilitate the full completion of the above reaction.

[0020] Stir the dried material with water first, and wash repeatedly until the obtained filtrate has no sulfate radicals (usually tested with barium chloride), and then use a centrifuge to filter the above washing liquid.

[0021] Dry the above-mentioned washed and filtered solid at a drying temperature of 80°C and a drying time of 3 hours to obtain amorphous iron oxyhydroxide, and roast the above-mentioned amorphous iron oxyhydroxide at 200°C for 2 hours to obtain Obtain the magnetic iron oxide Fe described in the present invention 21.333 o 32 Desulfurizer A.

[0022] In this desulf...

Embodiment 2

[0024] Mix 64g of ferrous sulfate powder and 21.2g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.4; put the above mixed material into a kneader and knead for 0.5h to complete the reaction between the above reactants. The solid-phase reaction was carried out, and then the above reaction product was air-dried.

[0025] Add water and stir the dried material first, and wash repeatedly until the obtained filtrate has no sulfate radicals (usually tested with barium chloride), and use a centrifuge to filter the above washing liquid.

[0026] Naturally dry the above-mentioned washed and filtered solid, the drying temperature is -5°C, and the drying time is 10h, then the amorphous iron oxyhydroxide can be obtained, and the above-mentioned amorphous iron oxyhydroxide is roasted at 190°C for 1.0h. Obtain the magnetic iron oxide Fe described in the present invention 21.333 o 32 Desulfurizer B.

[0027] In this desulfurizer B, containing 97.0wt% magneti...

Embodiment 3

[0029] Mix 34.2g of ferrous nitrate powder and 23.4g of potassium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.0; put the above mixed material into a kneader and knead for 1.0h to complete the reaction of the above reactants The solid phase reaction between them was carried out, and then the above reaction product was air-dried.

[0030] Add water and stir the dried material first, and wash repeatedly until the obtained filtrate has no sulfate radicals (usually tested with barium chloride), and use a centrifuge to filter the above washing liquid.

[0031] Naturally dry the above-mentioned washed and filtered solid at a drying temperature of 45°C and a drying time of 3 hours to obtain amorphous iron oxyhydroxide, and roast the above-mentioned amorphous iron oxyhydroxide at 180°C for 2.0 hours to obtain Obtain the magnetic iron oxide Fe described in the present invention 21.333 o 32 Desulfurizer C.

[0032] In this desulfurizer C, containing 93.1wt% m...

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Abstract

The invention relates to a method for preparing magnetic oxide iron Fe21.333O32, which comprises the following steps: (a) mixing solid soluble ferrous salt and solid hydroxid according to a molar ratio of iron to hydroxyl being between 1:2 and 1:3; (b) completing reaction of a mixed material prepared in step (a) by kneading, and controlling the temperature of the material not to exceed 70 DEG C in the kneading process; (c) drying a reaction product obtained in step (b) in air; (d) washing and filtering a material obtained in step (c); (e) naturally drying or baking a solid obtained in step (d); and (f) roasting a product obtained in step (e) at a temperature of between 150 and 500 DEG C. The invention further discloses a magnetic oxide iron Fe21.333O32 desulfurizer prepared by the preparation method. Tests show that the desulfurizer has high sulfur capacity reaching 62.0 percent.

Description

technical field [0001] The present invention relates to a magnetic iron oxide Fe with high sulfur capacity 21.333 o 32 Desulfurizer and magnetic iron oxide Fe 21.333 o 32 The preparation method belongs to the technical field of desulfurization and purification. Background technique [0002] Sulfides are produced in many occasions in industrial production. For example, in the production process of producing chemical raw materials from coal or petroleum, as well as in the wastewater or waste gas discharged from general industrial production. Among them, in the production process of producing chemical raw materials from coal or petroleum, the hydrogen sulfide produced is mainly due to the fact that the raw materials contain more sulfur-containing substances, which cause the sulfur-containing substances to react during the production process and release hydrogen sulfide. , which directly leads to the poisoning and deactivation of catalyst active substances in the subsequent...

Claims

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Application Information

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IPC IPC(8): C01G49/02
Inventor 刘振义喻永生
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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