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A kind of solid mixing method for preparing amorphous iron oxyhydroxide desulfurizer

An iron oxyhydroxide and amorphous technology, applied in the direction of iron oxide/iron hydroxide, etc., can solve the problems of inability to prepare amorphous iron oxyhydroxide desulfurizer, uncontrollable reaction temperature, etc., and achieve high sulfur capacity and high desulfurization accuracy , The effect of low preparation cost

Active Publication Date: 2017-01-25
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

[0007] The technical problem to be solved by the present invention is to solve the problem that the desulfurizer with amorphous iron oxyhydroxide as the active component cannot be prepared due to the uncontrollable reaction temperature in the reaction process in the preparation process of the iron oxyhydroxide desulfurizer in the prior art, and then provide Preparation method of a desulfurizer with high content of amorphous iron oxyhydroxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix 278.0g of ferrous sulfate heptahydrate with 79g of ammonium bicarbonate, and complete the reaction by mixing and grinding, and the reaction is completed when the mixing and grinding is until it becomes muddy;

[0028] (2) drying the material obtained in step (1) in the air;

[0029] (3) Add 51.8g of Ca(OH) to the dried material in step (2) 2 Continue mixing and milling to complete the reaction, extrude and form, and dry at 30°C to obtain a desulfurizer A with an amorphous iron oxyhydroxide content of 30wt%.

Embodiment 2

[0031] (1) 278.0g of ferrous sulfate heptahydrate and 86.4g of ammonium carbonate were mixed and milled to complete the reaction, and the reaction was completed when mixed and milled until it appeared in a muddy state;

[0032] (2) drying the material obtained in step (1) in the air;

[0033] (3) Add 74g of Ca(OH) to the dried material in step (2) 2 Continue mixing and milling to complete the reaction, and then extrude to shape, and then dry at 50°C to obtain an amorphous iron oxyhydroxide content of 41wt% desulfurizer B.

Embodiment 3

[0035] (1) Take 278.0g of ferrous sulfate heptahydrate and 189.6g of ammonium bicarbonate to complete the reaction through mixing and grinding, and the reaction is completed when the mixing and grinding is until it becomes muddy;

[0036] (2) drying the material obtained in step (1) in the air;

[0037] (3) Add 88.8g of Ca(OH) to the dried material in step (2) 2 After continuing to mix and mill to complete the reaction, extrude into a strip, and then dry at 60°C to obtain an amorphous iron oxyhydroxide content of 40wt% desulfurizer C.

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PUM

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Abstract

The invention provides a preparation method of an amorphous FeOOH desulfurizer by mixing solids, and belongs to the technical field of desulfurizer preparation. The preparation method comprises the following steps of (1) mixing and rolling ferrous sulfate heptahydrate with ammonium bicarbonate or ammonium carbonate uniformly, and drying an obtained material in air; (2) adding calcium hydrate to the dried material in step (1), mixing and rolling uniformly, extruding strips, and obtaining a material containing amorphous FeOOH after dying the strips. The content of active ingredient amorphous FeOOH in the amorphous FeOOH desulfurizer obtained by the preparation method provided by the invention is up to more than 95wt%, the disposable sulfur penetration capacity of the desulfurizer is up to more than 40%, and the desulfurizer is advantaged by high sulfur capacity and high desulphurization precision.

Description

technical field [0001] The invention relates to a preparation method of amorphous iron oxyhydroxide, which belongs to the technical field of desulfurization agents. Background technique [0002] In industrial production, sulfides are produced in many occasions. For example, in the production process of using coal or petroleum as raw material to produce chemical products, since the raw material contains more sulfur-containing substances, this part of sulfur-containing substances will react in the above-mentioned production process to release hydrogen sulfide, thus and The reaction of catalyst active substances in subsequent production sections leads to poisoning and inactivation of the active substances; in addition, hydrogen sulfide and other sulfides also exist in wastewater or waste gas discharged from ordinary industrial production. If they are directly discharged, they will seriously affect the environment and even cause Human and animal poisoning. [0003] At present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02
Inventor 刘振义李新王立贤白洪彬邱新荣
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD