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Process for preparing adsorbent simultaneously removing hydrogen chloride and mercury steam

A hydrogen chloride and mercury vapor technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as high cost, difficulty in large-scale industrial application, poor selective removal effect, etc., achieve low cost and improve thermal stability Performance, the effect of good ion exchange

Inactive Publication Date: 2006-08-23
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the adsorbents used in dechlorination and mercury removal under relatively high temperature conditions at home and abroad are basically activated carbon adsorption materials, but activated carbon adsorbents have poor selective removal effect on low-content hydrogen chloride gas and mercury gas, and the cost is high. Difficult for large-scale industrial application
At present, under certain temperature conditions (greater than 300 ° C), non-carbon adsorbents that have good removal effects and simultaneously remove hydrogen chloride and mercury gas pollutants have not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix the bentonite suspension with a mass fraction of 1% and cetyltrimethylammonium bromide with a concentration of 0.2mol / L at 50°C for 24 hours. After confirming that the mixture is uniform, add dodecylamine and polyhexenol and mix for 10 hour, add tetraethyl orthosilicate until the system has precipitation, dry the mixture at 80°C for 12 hours, and then heat at 400°C for 6 hours, the powder obtained in this way enters the next step, the bentonite, hexadecane The molar ratio of trimethylammonium bromide, dodecylamine, polyhexenol, and ethyl orthosilicate was 1:20:20:5:150. Prepare a mixed solution of magnesium chloride, titanium tetrachloride and aluminum chloride at a molar ratio of 10:3:5, soak the powder obtained in the first step in the mixed solution and let it stand for 24 hours, then add dropwise an excess mass concentration of 5 % dilute ammonia water, after fully reacting, the system is dried and annealed at 500°C to obtain the adsorbent

[0012] Performance ...

Embodiment 2

[0016] Mix the bentonite suspension with a mass fraction of 2% and cetyltrimethylammonium bromide with a concentration of 0.3mol / L at 50°C for 24 hours. After confirming that the mixture is uniform, add dodecylamine and polyhexenol and mix for 24 hours. hour, add tetraethyl orthosilicate until the system has precipitation, dry the mixture at 90°C for 12 hours, and then heat at 400°C for 6 hours, the powder obtained in this way enters into one-step operation, the bentonite, hexadecyl The molar ratio of trimethylammonium bromide, dodecylamine, polyhexenol, and ethyl orthosilicate was 1:30:20:10:180. Prepare a mixed solution of magnesium chloride, titanium tetrachloride and aluminum chloride at a molar ratio of 5:1:2, soak the powder obtained in the first step in the mixed solution and let it stand for 24 hours, then add dropwise an excess mass concentration of 1 % dilute ammonia water, after fully reacting, the system is dried and annealed at 400°C to obtain the adsorbent

[00...

Embodiment 3

[0021] Mix the bentonite suspension with a mass fraction of 1% and cetyltrimethylammonium bromide with a concentration of 0.5mol / L at 60°C for 24 hours. After confirming that the mixture is uniform, add dodecylamine and polyhexenol and mix for 24 hours. hours, add tetraethyl orthosilicate until the system has a precipitate, dry the mixture at 80°C for 12 hours, and then heat at 500°C for 6 hours, the powder obtained in this way enters a one-step operation, the bentonite, hexadecyl The molar ratio of trimethylammonium bromide, dodecylamine, polyhexenol, and tetraethyl orthosilicate was 1:50:20:10:200. Prepare a mixed solution of magnesium chloride, titanium tetrachloride and aluminum chloride at a molar ratio of 10:1:2, soak the powder obtained in the first step in the mixed solution and let it stand for 24 hours, then add dropwise an excess mass concentration of 2 % dilute ammonia water, after fully reacting, the system is dried and annealed at 600°C to obtain the adsorbent

...

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Abstract

The present invention discloses preparation process of adsorbent for removing HCl and Hg steam simultaneously. The preparation process includes the following steps: 1. mixing bentonite suspension and ammonium cetyl trimethyl bromide at 50-100 deg.c for 10-24 hr, adding dodecylamine and polyhexenol and mixing for other 10-24 hr, adding ethyl silicate until creating precipitate, drying the precipitate at 80-100 deg.c for 12 and heating at 200-500 deg.c for 6 hr to obtain powder; and 2. compounding mixture solution of magnesium chloride, titanium tetrachloride and aluminum chloride, soaking the powder inside the mixture solution for 24 hr, dropping excessive dilute ammonia water to react, drying the product, and annealing at 300-600 deg.c to obtain the adsorbent. The adsorbent can remove HCl and Hg steam simultaneously, and has high removing effect, low cost and high heat stability.

Description

technical field [0001] The invention relates to a preparation method of an environmentally friendly adsorbent capable of simultaneously removing hydrogen chloride gas and mercury gas from gas under a certain temperature condition (greater than 300 DEG C). Background technique [0002] Hydrogen chloride gas and mercury gas can cause fatal hazards to the ecological environment and human health, and are harmful and highly toxic gases emitted in the air. my country consumes a lot of coal, and hydrogen chloride and mercury pollution are particularly harmful to the environment. In addition, many expensive catalysts will be poisoned and invalidated when used in an atmosphere containing hydrogen chloride, resulting in serious waste. In the industry, it is necessary to solve the problem of removing hydrogen chloride and mercury gas in the process of preparing synthesis gas, high-temperature gas, various industrial incineration gases and coal combustion power generation. At present,...

Claims

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Application Information

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IPC IPC(8): B01J20/26
Inventor 豆斌林陈兵兵
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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