Recyclable desulfurizer and preparation method thereof and regeneration method

A desulfurizer and waste agent technology, which is applied in the fields of sulfur preparation/purification, catalyst regeneration/reactivation, separation method, etc. The effect of easy regeneration and high sulfur capacity

Active Publication Date: 2010-12-01
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

[0008] For this reason, the technical problem to be solved by the present invention is to overcome the disadvantages of low sulfur capacity of desulfurizers in the prior art, which cannot be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0026] Mix 2560g of ferrous sulfate heptahydrate powder with 1030g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.8; put the above mixed material into a kneader, control the reaction temperature to 40-50°C and knead 3h, so as to complete the solid-phase reaction between the above-mentioned reactants, and then put the above-mentioned reaction product in the air to dry, so as to facilitate the full completion of the above-mentioned reaction. 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. Dry the above-mentioned washed and filtered solid at a drying temperature of 80° C. and a drying time of 3 hours to obtain material A containing amorphous iron oxyhydroxide. In material A, 97.0 wt% of amorphous hydroxyl Iron...

Embodiment 2

[0033] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0034] Mix 2560g of ferrous sulfate heptahydrate powder with 883g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.4; put the above mixed material into a kneader, control the reaction temperature to 80°C and knead for 0.5 h, thereby completing the solid-phase reaction between the above-mentioned reactants, and then putting the above-mentioned reaction product in the air to dry. 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. The above-mentioned washed and filtered solid was naturally dried at a drying temperature of -5° C. and a drying time of 10 h to obtain a material B containing amorphous iron oxyhydroxide. In this material B, it contains 95.8wt% amorphous iron oxyhydroxide, and the balance is sodium sulfa...

Embodiment 3

[0040] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0041] Mix 4320g of ferrous nitrate hexahydrate powder and 1680g of potassium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.0; put the above mixture into a kneader, control the reaction temperature to 60-70°C and knead 1.0h, thereby completing the solid-phase reaction between the above-mentioned reactants, and then putting the above-mentioned reaction product in the air to dry. Add water to the dried material, stir it, and wash it repeatedly until the obtained filtrate is free of potassium ions (detected by flame photometry), and then use a centrifuge to filter the washing solution. 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 a material C containing amorphous iron oxyhydroxide. In material C, 96.1 wt % of amorphous hydroxyl Iron oxide, the balance is potassium nitrate and water, and its sulfu...

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PUM

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Abstract

The invention relates to a recyclable dry desulfurizer with high sulfur capacity. The desulfurizer contains not less than 88% of substances containing FeOOH and not less than 7% of organic binders, wherein the organic binder is one or more of sodium carboxymethyl cellulose, sesbania and cellulose powder. The invention further discloses a preparation method of the desulfurizer and a regeneration method of waste agents generated after the desulfurizer is used. The invention solves the following problems in the prior art: the dry-formed desulfurizer has low sulfur capacity, and after the dry-formed desulfurizer is used once, the waste agents can not be regenerated or the regeneration cost is high, so that great amount of waste agents are only buried, thus not only wasting the effective resources in the original desulfurizer but also leading to new environmental pollution problems.

Description

technical field [0001] The invention relates to a recyclable desulfurizing agent for dry desulfurization, which belongs to the technical field of desulfurizing agents. Background technique [0002] Sulfides are produced in many occasions in industrial production, such as in the production process of producing chemical raw materials from coal or petroleum and in the waste water or waste gas discharged from industrial production. Among them, in the production process of producing chemical raw materials from coal or petroleum, since the raw materials contain a lot of sulfur-containing substances, these sulfur-containing substances react to release hydrogen sulfide during the production process, which directly leads to catalysts in subsequent production sections. The active substance is inactivated by poisoning. In addition, sulfides such as hydrogen sulfide and other sulfides contained in waste water or waste gas discharged from industrial production will seriously affect the ...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C01B17/02C01B17/04
CPCB01J38/56B01J23/745C01G49/14B01J38/58C01G49/02B01D53/508B01J38/60B01J27/28B01J38/48B01D2255/20738B01D53/52Y02P20/584
Inventor 刘振义汪祥胜
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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