Preparation method of complex iron catalyst for wet desulphurization

A wet desulfurization and catalyst technology, which is applied in the preparation of organic compounds, catalyst protection, chemical instruments and methods, etc., can solve the problems of high desulfurization cost, increased suspended solids in the desulfurization system, blockage of fillers, and strong corrosiveness. Sulfur capacity, inhibit the production of secondary salts, good effect of absorbing hydrogen sulfide

Inactive Publication Date: 2020-08-28
河北品臣环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent 201610777813.0 discloses a complex iron desulfurization liquid for wet desulfurization and its preparation method, including antioxidant, non-ionic surfactant, defoamer, complex iron catalyst and water. The preparation method is complicated and stable poor sex
[0004] Chinese patent CN1398659A discloses a biochemical iron-alkali solution catalytic gas desulfurization method, using iron-alkali solution to remove organic sulfur and/or inorganic sulfur in cold air, and the iron-alkali solution is composed of aerobic spores and/or aerobic bacteria , iron compounds, alkaline substances, phenolic substances and water, it is a biochemical wet desulfurization technology, but the cost of this catalyst is high, the stability is poor, and the initial investment in practical application is large
[0005] The document "ISS complex iron-polyphenol catalyst desulfurization technology" discloses a complex iron-polyphenol desulfuri

Method used

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  • Preparation method of complex iron catalyst for wet desulphurization
  • Preparation method of complex iron catalyst for wet desulphurization
  • Preparation method of complex iron catalyst for wet desulphurization

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Experimental program
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Effect test

Embodiment 1

[0028] The preparation method that is used for wet method desulfurization complex iron catalyst comprises the following steps:

[0029] (1) Throwing phthalic anhydride and fuming sulfuric acid with a mass ratio of 1.5:1 into the reaction kettle and raising the temperature to 240°C until the reaction is complete to obtain sulfophthalic acid;

[0030] (2) Add sodium hydroxide to sulfophthalic acid, stir until the reaction is complete to obtain compound I;

[0031] (3) Compound I and cobalt chloride with a molar ratio of 1:2 were heated to 220°C to react to obtain Compound II;

[0032] (4) Compound I with a molar ratio of 1:2 and ferric hydroxide were raised to 220°C to react to obtain Compound III;

[0033] (5) heating compound II and compound III at a molar ratio of 1:1 to react at 260°C to obtain compound IV;

[0034] (6) Stabilizer preparation: mix ATMP, water, ammonia and citric acid with a mass ratio of 1:3:0.1:0.1 to make a double stabilizer;

[0035] (7) Compound IV wi...

Embodiment 2

[0037] The preparation method that is used for wet method desulfurization complex iron catalyst comprises the following steps:

[0038] (1) Put phthalic anhydride and fuming sulfuric acid with a mass ratio of 1:1 into the reaction kettle and heat up to 220°C until the reaction is complete to obtain sulfophthalic acid;

[0039] (2) Add sodium hydroxide to sulfophthalic acid, stir until the reaction is complete to obtain compound I;

[0040] (3) Compound I with a molar ratio of 1:2 and cobalt chloride were heated to 200°C to react to obtain Compound II;

[0041] (4) The compound I with a molar ratio of 1:2 is reacted with ferric hydroxide to 240°C to obtain compound III;

[0042] (5) heating compound II and compound III at a molar ratio of 1:1 to 280° C. to react to obtain compound IV;

[0043] (6) Stabilizer preparation: mix ATMP, water, ammonia and citric acid with a mass ratio of 1:5:0.05:0.05 to make a double stabilizer;

[0044] (7) Compound IV with a mass ratio of 2:1 w...

Embodiment 3

[0046] The preparation method that is used for wet method desulfurization complex iron catalyst comprises the following steps:

[0047] (1) Put phthalic anhydride and fuming sulfuric acid with a mass ratio of 2:1 into the reaction kettle and heat up to 240°C until the reaction is complete to obtain sulfophthalic acid;

[0048] (2) Add sodium hydroxide to sulfophthalic acid, stir until the reaction is complete to obtain compound I;

[0049] (3) Compound I with a molar ratio of 1:2 and cobalt chloride were heated to 240°C to react to obtain Compound II;

[0050] (4) react compound I with a molar ratio of 1:2 and ferric hydroxide to 200°C to obtain compound III;

[0051] (5) heating compound II and compound III at a molar ratio of 1:1 to react at 240°C to obtain compound IV;

[0052] (6) Stabilizer preparation: mix ATMP, water, ammonia and citric acid with a mass ratio of 1:1:0.15:0.1 to make a double stabilizer;

[0053] (7) Compound IV with a mass ratio of 5:1 is mixed with ...

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Abstract

The invention discloses a preparation method of a complex iron catalyst for wet desulphurization, and belongs to the technical field of environmental protection. The preparation method comprises the following steps: (1) preparing sulfophthalic acid; (2) reacting sulfophthalic acid with sodium hydroxide to prepare a compound I; (3) reacting the compound I with cobalt chloride to prepare a compoundII; (4) reacting the compound I with an iron-containing compound to prepare a compound III; (5) reacting the compound II with a compound III to obtain a compound IV; (6) preparing a stabilizer; and (7) uniformly mixing the compound IV with double stabilizers, heating, cooling, and drying to obtain the catalyst. According to the prepared composite iron catalyst for sulfur-containing gas desulfurization, the working sulfur capacity is greatly improved, the concentration of iron ions is reduced while hydrogen sulfide absorption is completed, the ideal absorption effect is achieved, the side reaction occurrence probability is reduced, the very good hydrogen sulfide absorption effect can be achieved, and meanwhile generation of secondary salt can be inhibited.

Description

technical field [0001] The invention relates to a desulfurization catalyst, in particular to a complex iron catalyst, and belongs to the technical field of environmental protection. Background technique [0002] Chemical raw materials such as coal and natural gas, and other exhaust gases contain a certain amount of sulfides. If these sulfides are not removed, they will cause serious air pollution. In use, hydrogen sulfide can cause corrosion of equipment and pipelines and catalyst poisoning, resulting in increased production costs and affecting product quality. Therefore, the gas must be desulfurized before being used as fuel gas and syngas. There are many gas desulfurization methods, which can be divided into two categories: dry desulfurization and wet desulfurization according to the state of the desulfurizer. The dry desulfurization process uses solid adsorbents to remove hydrogen sulfide and organic sulfur in the gas. The desulfurization has a high degree of purificati...

Claims

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Application Information

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IPC IPC(8): C07C303/06C07C303/32C07C303/42C07C309/58B01J31/04B01J33/00C10L3/10
CPCC07C303/06C07C303/32C07C303/42B01J31/04B01J33/00C10L3/103C07C309/58
Inventor 牛凯伟
Owner 河北品臣环保科技有限公司
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