High-strength FeOOH desulfurizer and preparation method thereof

An iron oxyhydroxide and desulfurizer technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of low sulfur capacity, low mechanical strength, and unsatisfactory desulfurization effect of iron-based desulfurizers. The effect of improving dispersion, improving mechanical strength and avoiding the loss of desulfurizer

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

[0006] The present invention aims to solve the problems of low sulfur capacity, low mechanical strength and unsatisfactory desulfurization ef

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 320g of ferrous sulfate powder and 120g 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.

[0019] 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.

[0020] The above-mentioned washed and filtered solid is dried at a drying temperature of 60° C. and a drying time of 3 hours to obtain the active component of amorphous iron oxyhydroxide.

[0021] Weigh 95g of the amorphous ferric oxyhydroxide powder prepared above and 5g of safflower powder, mix and grind, then add an appropriate amount of water to extrude, and dr...

Embodiment 2

[0023] Mix 640g of ferrous sulfate powder and 212g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.4; put the above mixed material into the kneader, and knead for 0.5h to complete the reaction between the above reactants Solid phase reaction, after which the above reaction product was placed in the air to dry.

[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 naturally dried at a drying temperature of -5°C and a drying time of 10 hours to obtain the active component of amorphous iron oxyhydroxide.

[0026] Weigh 50 g of the amorphous ferric oxyhydroxide powder prepared above, and mix 50 g of safflower powder and cellulose powder for mixing and grinding, then add an appropriate amount of water for extrusion molding, and...

Embodiment 3

[0028] Mix 342g of ferrous nitrate powder and 234g 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 between the above reactants Solid phase reaction, after which the above reaction product was placed in the air to dry.

[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 solid is naturally dried at a drying temperature of 45° C. and a drying time of 3 hours to obtain the active component of amorphous iron oxyhydroxide.

[0031] Weigh 75g of the amorphous ferric oxyhydroxide powder prepared above and 25g of methylcellulose sodium salt, mix and grind, then add an appropriate amount of water to extrude, and dry the above-mentioned molded pro...

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PUM

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Abstract

The invention relates to a high-strength FeOOH desulfurizer, which consists of 50 to 95 weight percent of amorphous FeOOH, 0 to 45 weight percent of carrier and 5 to 50 weight percent of organic binder, wherein the carrier is one or more of aluminium oxide, diatomite, natural zeolite and catalytic cracking spent catalyst; and the organic binder is one or more of sodium carboxymethyl cellulose, sesbania powder and cellulose powder. The invention further discloses a preparation method for the desulfurizer on the basis. The FeOOH desulfurizer prepared by the preparation method has high sulfur capacity, high mechanical strength and wider applicable desulfurization range.

Description

technical field [0001] The invention relates to a high-strength iron oxyhydroxide desulfurizer with high sulfur capacity, 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 process. In addition, sulfides such as hydrogen sulfide and o...

Claims

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Application Information

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IPC IPC(8): B01D53/52
Inventor 喻永生刘振义刘凤仁
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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