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: 2010-07-07
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Abstract
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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 prepar

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0018] Example 1

[0019] Preparation of materials containing amorphous iron oxyhydroxide:

[0020] 152 g FeSO 4 Prepare the aqueous solution and place it in the reaction kettle, add 58 grams of solid Na under stirring conditions 2 CO 3 Finally, the pH of the mixed aqueous solution was adjusted to 8, after 0.5 hours of reaction, filtered, and the filter cake was washed with water until Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is prepared into an aqueous suspension with a solid mass percentage of 30%, and air is oxidized until Fe 2+ / Fe total 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 rest is Na 2 SO 4 , Water and TiO 2 (TiO 2 FeSO 4 The impurities in the salt are the same in the following examples), and the sulfur capacity of the material ...

Example Embodiment

[0025] Example 2

[0026] Preparation of materials containing amorphous iron oxyhydroxide:

[0027] 127 g FeCl 2 Prepare the aqueous solution and place it in the reaction kettle, and put 88 grams of solid K under stirring conditions 2 CO 3 , Carry out the reaction, adjust the pH of the mixed solution to 8.01 hours, filter, wash the filter cake with water until K in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is prepared into an aqueous suspension with a solid mass percentage of 15%, and air is oxidized until Fe 2+ / Fe total 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 rest is KCl , Moisture, ferroferric oxide and unknown impurities, the sulfur capacity of the material is 49.6%. Where K + The content is determined by flame photometry, and the followi...

Example Embodiment

[0033] Example 3

[0034] Preparation of materials containing amorphous iron oxyhydroxide:

[0035] 152 g FeSO 4 ·7H 2 The aqueous solution of O is placed in the reaction kettle, and 92 grams of solid NaHCO is added under stirring conditions 3 , Carry out the reaction, adjust the pH of the mixed solution to 8, 0.5 hours later, filter, and wash the filter cake with water until Na is in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is prepared into an aqueous suspension with a solid mass percentage of 30%, and air is oxidized until Fe 2+ / Fe total 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 rest is Na 2 SO 4 , Water, TiO 2 , The sulfur capacity of the material is 49.6%.

[0036] Regeneration method 1:

[0037] The material containing amorphous iron oxyhydr...

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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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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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