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

An iron oxyhydroxide, amorphous technology, applied in chemical instruments and methods, iron oxide/iron hydroxide, water/sludge/sewage treatment, etc., can solve the problem of low content of amorphous iron oxyhydroxide and achieve oxidation speed Slow, good desulfurization effect, high sulfur capacity

Active Publication Date: 2013-06-12
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] 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 ·7H 2 O is made into an aqueous solution and placed in a reaction kettle, and is added under stirring conditions by 58 grams of solid Na 2 CO 3 The prepared aqueous solution, finally adjust the pH of the mixed solution to 8, after reacting for 0.5 hours, filter, 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 industrial FeSO 4 ·7H 2 Impurities in O, the following ...

Embodiment 2

[0026] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0027] 88 g of solid K 2 CO 3 Be made into aqueous solution and be placed in reactor, add under stirring condition by 127 grams of FeCl 2 For the prepared aqueous solution, adjust the pH of the mixed solution to 8.0, react for 0.5 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 81%, and the remaining components are KCl , moisture, ferric oxide and unknown impurities, the sulfur capacity of the material is 50.2%. where K + The determination of con...

Embodiment 3

[0034] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0035] 152 g FeSO 4 ·7H 2 O is made into an aqueous solution and placed in a reaction kettle, and is added under stirring conditions by 92 grams of solid NaHCO 3 The resulting aqueous solution was mixed and the pH of the solution was adjusted to 8.5. After reacting for 0.5 hours, it was filtered and the filter cake was washed 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 and TiO 2 , the sulfur capacity of the material is 49.6%. ...

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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): C01G49/02C02F1/58
Inventor 刘振义喻永生黄镕
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD