Method for preparing material containing amorphous iron oxide hydroxide and methods for regenerating the same

An iron oxyhydroxide, amorphous technology, applied in the direction of iron oxide/iron hydroxide, etc., can solve the problem of low content of amorphous iron oxyhydroxide, and achieve the effects of slow oxidation speed, good desulfurization effect and fast oxidation speed.

Active Publication Date: 2012-11-07
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is the low content of amorphous iron oxyhydroxide in the materials prepared in the prior art, thereby proposing a method that can produce amorphous iron oxyhydroxide in large quantities and stably in industry. high material method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0020] 152 g FeSO 4 Make an aqueous solution and place it in a reactor, and drop 58 grams of solid Na 2 CO 3 , and finally adjust the pH of the mixed aqueous solution to 8, and after reacting for 0.5 hours, filter and wash the filter cake with water until the Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 30%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 100°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 85%, and the remaining components are Na 2 SO 4 , water and TiO 2 (TiO 2 for FeSO 4 Impurities in the salt, the following examples are the same), and the sulfur capacity of the material is 53%. The ...

Embodiment 2

[0026] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0027] 127 g FeCl 2 Be made into aqueous solution and be placed in reactor, drop into 88 grams of solid K under stirring condition 2 CO 3 , carry out the reaction and adjust the pH of the mixed solution to 8.01 hours, filter, and wash the filter cake with water until the K in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 15%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 90°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 80%, and the remaining components are KCl , moisture, ferric oxide and unknown impurities, the sulfur capacity of the material is 49.6%. where K + The determination of content adopts flame ph...

Embodiment 3

[0034] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0035] 152 g FeSO 4 ·7H 2O is made into an aqueous solution and placed in a reaction kettle, and 92 grams of solid NaHCO are dropped into under stirring conditions. 3 , carry out the reaction and adjust the pH of the mixed solution to 8. After 0.5 hours, filter and wash the filter cake with water until the Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 30%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 45°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 80%, and the remaining components are Na 2 SO 4 , water, TiO 2 , the sulfur capacity of the material is 49.6%.

[0036] Regeneration method 1:

[0037] ...

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Abstract

The invention relates to a method for preparing a material containing amorphous iron oxide hydroxide and two methods for regenerating the same after being used as desulfurizer. The content of the amorphous iron oxide hydroxide in the material prepared by the invention is as high as 65% to 100%, so the sulfur capacity of the material is high; and the desulfurizer in the prior art is non-regenerative or costly for regeneration, so that the desulfurizer in a large amount cannot but be dumped as waste liquid in landfills, while the amorphous iron oxide hydroxide in the material of the invention can be repeatedly regenerated and reused after the material is used as the desulfurizer, thereby solving the problems of the waste of effective resources in the original desulfurizer and the severe environmental pollution.

Description

technical field [0001] The invention relates to a method for preparing a material containing amorphous iron oxyhydroxide and a method for regenerating the prepared material containing amorphous iron oxyhydroxide after being used as a desulfurizing agent, belonging to the technical field of desulfurizing agents. Background technique [0002] Iron oxyhydroxide (FeOOH) is widely used as a desulfurizer in the chemical industry because of its good desulfurization performance. For example, Japanese Patent Document JP5329362A discloses a β-FeOOH desulfurizer for removing hydrogen sulfide in industrial wastewater and a preparation method thereof. In the article titled "Research on the desulfurization activity of iron oxyhydroxide prepared by different methods" ("Coal Conversion" Volume 29, Issue 3), different crystalline iron oxyhydroxides such as α-FeOOH, β-FeOOH, γ- The normal temperature gas desulfurization activity of FeOOH and amorphous iron oxyhydroxide, among which amorphous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02
Inventor 刘振义喻永生林科
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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