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Dechlorination agent and its preparation process

A dechlorinating agent, polyhexenol technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of numerous preparation steps of dechlorinating agent, affecting performance, accelerating pulverization, etc., to achieve good adsorption. and ion exchange performance, improving thermal stability, and accelerating chemical reactions

Inactive Publication Date: 2007-07-11
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0002] Many expensive catalysts will be poisoned and invalid when used in an atmosphere containing hydrogen chloride. In the industry, the problem of removing hydrogen chloride gas needs to be solved in the process of producing synthesis gas, high-temperature gas, biomass gas and various combustion power generation processes.
There are many types of dechlorination agents at home and abroad, but there are still many problems to be solved urgently. For example, the dechlorination agents of calcium-based active ingredients are easy to absorb water vapor and affect performance and accelerate pulverization. There are many steps in the preparation of the dechlorination agent of the modified organoclay carrier, not only the introduction of components is difficult, but also it is difficult to achieve the optimal loading ratio and loading of various alkali metals / alkaline earth metals, and the controllability is poor
In addition, the current dechlorination agents generally have problems such as high cost of use, poor thermal stability, and easy to cause secondary pollution after the dechlorination agent fails.

Method used

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  • Dechlorination agent and its preparation process
  • Dechlorination agent and its preparation process
  • Dechlorination agent and its preparation process

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preparation example Construction

[0014] The preparation method of the dechlorination agent is to mix polyhexenol, layered bentonite mineral and cetyltrimethylammonium bromide with sodium hydroxide, magnesium hydroxide and copper hydroxide at a temperature of 40 to 80°C. Mix alkali solution to carry out slurry synthesis reaction; after fully reacting, extrude the reaction product, dry at 80-100°C for 4 hours, and then roast at 650°C for 10 hours to obtain the dechlorination agent.

[0015] Performance Testing:

[0016] MgCl in dechlorination reaction product 2 , CuCl 2 and NaCl, MgCl 2 The melting point is the lowest (being 974K), therefore, when the temperature exceeds 974K, MgO, one of the active components of the dechlorination agent, will lose its effect, which will affect the dechlorination performance of the dechlorination agent. Therefore, the highest use of the dechlorination agent of the present invention The temperature should be less than 974K. The test conditions for dechlorination performance ...

Embodiment 1

[0018] Composition formula of dechlorination agent:

[0019] Bentonite 50wt%, chemical reagent polyhexenol 5wt%, cetyltrimethylammonium bromide 5wt%, Mg(OH) 2 (20wt%), Cu(OH) 2 (8 wt%), NaOH (12 wt%).

[0020] Performance Testing:

[0021] The bulk density is 0.76g.ml 1 , the lateral compressive strength is 103N / cm, and the specific surface area of ​​BET test is 93.356m 2 / g.

[0022] The relationship between temperature and chlorine capacity is shown in Figure 1, and the breakthrough curve is shown in Figure 2.

Embodiment 2

[0024] Composition formula of dechlorination agent:

[0025] Bentonite 55wt%, chemical reagent polyhexenol 5wt%, cetyltrimethylammonium bromide 5wt%, Mg(OH) 2 (15wt%), Cu(OH) 2 (5wt%), NaOH (15wt%).

[0026] Performance Testing:

[0027] The bulk density is 0.70g.ml 1 , the lateral compressive strength is 95N / cm, and the specific surface area of ​​BET test is 98.267m 2 / g.

[0028] The relationship between temperature and chlorine capacity is shown in Figure 3, and the breakthrough curve is shown in Figure 4.

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Abstract

An antichlor is proportionally prepared from polyhexenol, bentorite, alkylammonium salt, sodium hydroxide, magnesium hydroxide and copper hydro-oxide through slurry synthesizing reaction, extruding for shaping, baking and calcining. Its advantages are high effect and Cl capacity, and high thermal stability.

Description

technical field [0001] The present invention relates to a new environment-friendly dechlorination agent for deep removal of hydrogen chloride gas at high temperature. More specifically, the present invention relates to a deep removal of chlorine-containing gas for high-temperature coal gasification, biomass gas production, various combustion power generation, and chemical industry. Hydrogen chloride dechlorination agent and preparation method thereof. Background technique [0002] Many expensive catalysts will be poisoned and invalid when used in an atmosphere containing hydrogen chloride. In the industry, the problem of removing hydrogen chloride gas needs to be solved in the process of producing synthesis gas, high-temperature gas, biomass gas and various combustion power generation processes. There are many types of dechlorination agents at home and abroad, but there are still many problems to be solved urgently. For example, the dechlorination agents of calcium-based act...

Claims

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Application Information

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IPC IPC(8): B01D53/68
Inventor 豆斌林陈兵兵
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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