Method for preparing amorphous FeOOH and FeOOH desulfurizer prepared thereby

An iron oxyhydroxide, amorphous technology, applied in iron oxide/iron hydroxide and other directions, to save energy and avoid process problems

Active Publication Date: 2012-05-09
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

[0007] This invention aims to solve the problem that iron-based desulfurizers in the prior art have many main active ingredients, but the sulfur capacity is low and the desulfurization effect is not ideal. A single active component desulfurizer with high sulfur capacity
[0008] The second technical problem to be solved by the present invention is that the wet method used in the prior art to prepare iron-based desulfurizers is likely to cause waste liquid pollution, and the preparation method does not Applicable to the problems of large-scale industrial production, and then provide a dry preparation method suitable for large-scale industrial production, environmentally friendly and not limited to the preparation of desulfurizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 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.

[0024] 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.

[0025] The above-mentioned washed and filtered solid is dried at a drying temperature of 80° C. and a drying time of 3 hours to obtain the amorphous iron oxyhydroxide desulfurizer A of the present invention.

[0026] In this desulfurizer A, 97.0wt% of amorphous iron oxyhydroxide is contained, and the balance is sodium sulfate and water.

Embodiment 2

[0028] 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.

[0029] 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.

[0030] The above-mentioned washed and filtered solids are naturally dried at a drying temperature of -5°C and a drying time of 10 hours to obtain the amorphous iron oxyhydroxide desulfurizer B of the present invention.

[0031] The desulfurizer B contains 95.8wt% amorphous iron oxyhydroxide, and the balance is sodium sulfate and water.

Embodiment 3

[0033] 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-mentioned reaction product was placed in the air to dry.

[0034] 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.

[0035] The above-mentioned washed and filtered solid is naturally dried at a drying temperature of 45° C. and a drying time of 3 hours to obtain the amorphous iron oxyhydroxide desulfurizer C of the present invention.

[0036] The desulfurizer C contains 96.1 wt% of amorphous iron oxyhydroxide, and the balance is potassium nitrate and water.

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Abstract

The invention relates to a method for preparing amorphous FeOOH, 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); and (e) naturally drying or baking a solid obtained in step (d). On the basis, the invention further discloses an amorphous FeOOH desulfurizer prepared by the preparation method, and the desulfurizer has high sulfur capacity and high desulfurization efficiency.

Description

technical field [0001] The invention relates to an amorphous iron oxyhydroxide desulfurizer with high sulfur capacity and a preparation method of the amorphous iron oxyhydroxide, belonging 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 production proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02
Inventor 刘振义刘凤仁
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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