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Desulfurization catalyst and preparation method thereof

A desulfurization catalyst and corrosion inhibitor technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem that desulfurization cannot operate normally and the resistance of desulfurization tower increases , less discharge and other problems, to achieve the effect of saving losses, reducing pollution, and large sulfur capacity

Inactive Publication Date: 2020-09-18
山西科码环保科技有限公司
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Problems solved by technology

However, due to the small amount of liquid discharge, the impurities in the coke oven gas are absorbed by the desulfurization liquid absorbed by circulation, resulting in higher and higher concentrations of tar and other impurities in the desulfurization liquid, and the impurities in the desulfurization liquid hang in the packing of the desulfurization tower, resulting in The resistance of the desulfurization tower gradually increases, eventually causing tower blockage and desulfurization cannot operate normally

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  • Desulfurization catalyst and preparation method thereof
  • Desulfurization catalyst and preparation method thereof
  • Desulfurization catalyst and preparation method thereof

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[0065] The second aspect of the present invention provides the preparation method of the above-mentioned desulfurization catalyst, comprising the following steps:

[0066] The desulfurization catalyst is obtained by fully stirring the coordination complex of variable-valence metal iron, borax, inorganic salt, nitrogen-containing compound, and corrosion inhibitor.

[0067] The third aspect of the present invention provides the application of the above-mentioned desulfurization catalyst in the coke oven gas wet desulfurization production process.

Embodiment 1

[0072] Embodiment 1 provides a desulfurization catalyst, the composition of the desulfurization catalyst in parts by weight: 60 parts of coordination complexes of variable-valence metal iron, 2 parts of nitrogen-containing compounds, 1 part of borax, 3 parts of inorganic salts, 1 part corrosion inhibitor;

[0073] The coordination complex of the variable valence metal iron is sodium hexacyanoferrate (III);

[0074] The nitrogen-containing compound is a mixture of nitrogen-containing compound I and nitrogen-containing carboxylate; the quality of the nitrogen-containing compound I and nitrogen-containing carboxylate is 1:0.8; the chemical formula of the nitrogen-containing compound I is: where the R 1 represents a methyl group, the R 2 , R 3 Both represent -CH 2 CH 2 OH; the chemical structural formula of the nitrogen-containing carboxylate is: where the R 4 Indicates -(CH 2 ) n -, and said n is 1;

[0075] Described borax is sodium tetraborate decahydrate (CAS numbe...

Embodiment 2

[0081] Embodiment 2 provides a desulfurization catalyst, the composition of the desulfurization catalyst in parts by weight: 85 parts of coordination complexes of variable-valence metallic iron, 10 parts of nitrogen-containing compounds, 5 parts of borax, 15 parts of inorganic salts, 5 parts of corrosion inhibitor;

[0082] The coordination complex of the variable valence metal iron is sodium hexacyanoferrate (III);

[0083] The nitrogen-containing compound is a mixture of nitrogen-containing compound I and nitrogen-containing carboxylate; the quality of the nitrogen-containing compound I and nitrogen-containing carboxylate is 1:1.2; the chemical formula of the nitrogen-containing compound I is: where the R 1 represents a methyl group, the R 2 , R 3 Both represent -CH 2 CH 2 OH; the chemical structural formula of the nitrogen-containing carboxylate is: where the R 4 Indicates -(CH 2 ) n -, and said n is 1;

[0084] Described borax is sodium tetraborate decahydrate ...

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Abstract

The invention belongs to the technical field of wet desulfurization production of coke oven gas, and particularly relates to a desulfurization catalyst and a preparation method thereof. The desulfurization catalyst at least comprises the following components in parts by weight: 60-85 parts of a coordination complex of variable-valence metal iron, 2-10 parts of a nitrogen-containing compound and 1-5 parts of borax, wherein the nitrogen-containing compound at least comprises a nitrogen-containing compound I, the chemical formula of the nitrogen-containing compound I is shown in the specification, R1 represents C1-C5 alkyl and R2 and R3 independently represent an alkyl group containing hydroxyl substituted C1-C5. The desulfurization catalyst provided by the invention is strong in catalytic activity, high in desulfurization efficiency, large in sulfur capacity, capable of realizing desulfurization regeneration cycle, stable and cheap, the purpose of cleaning can be achieved without shutdown in the coke oven gas wet desulphurization production and use process, meanwhile, cleaned impurities can overflow along with sulfur foam at the top of the regeneration tower, losses caused by shutdown cleaning are reduced, pollution caused by cleaning liquid discharging is reduced, and the efficiency and stability of a catalyst cannot be affected.

Description

technical field [0001] The invention belongs to the technical field of coke oven gas wet desulfurization production, and in particular relates to a desulfurization catalyst and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, the content of harmful gases such as hydrogen sulfide, sulfur dioxide, hydrogen cyanide and carbon dioxide discharged into the atmosphere is increasing day by day, which has caused serious environmental pollution and directly endangered human health. In order to protect the living environment of human beings, it is increasingly urgent and important to develop and research desulfurization technology. [0003] At present, there are many methods for removing sulfides, such as activated carbon and iron oxide in the dry method; in the wet method, there are many methods such as improved A.D.A method, rubber copying method, ammonia liquid phase catalytic method, and benzoquinone method. The above-menti...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/18B01J31/02C10K1/34
CPCB01J31/0237B01J31/0245B01J31/1805B01J31/26B01J2531/842C10K1/34
Inventor 杨建华
Owner 山西科码环保科技有限公司
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