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Modified 4a molecular sieve adsorbent and preparation method thereof

A molecular sieve and adsorbent technology, which is applied in the field of modified 4a molecular sieve adsorbent and its preparation, can solve the problems of expensive raw materials, achieve high utilization rate, increase specific surface area, and save energy

Inactive Publication Date: 2013-05-08
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This application uses lanthanide metals, which are relatively expensive raw materials and are not suitable for industrial use in large quantities. Therefore, it is necessary to find adsorbents with strong adsorption capacity and low price.

Method used

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  • Modified 4a molecular sieve adsorbent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Modified 4a molecular sieve adsorbent and preparation method thereof, the specific operations are as follows:

[0032] (1) Pulverize the 4a molecular sieve whose chemical composition weight percentage is C 3%, O 42%, Na 3%, Mg 2%, Al 15%, Si 25%, Cl 3%, Ca 2%, Fe 2%, sieve Sorted to a particle size of 20-100 mesh;

[0033] (2) Add 0.5 mol / L hydrochloric acid solution to 4a molecular sieve, the solid-to-liquid ratio is 1:20, then the mixture is stirred at a constant temperature at 70°C for 3 hours, filtered and washed until PH = 7, and dried at 80°C for 6 Hours later, roast for 2 hours, and the roasting temperature is 200°C;

[0034] (3) Weigh 0.11g of ruthenium chloride trihydrate into a beaker, add 3.6ml of deionized water, stir and dissolve to prepare a ruthenium chloride solution, then add 0.8ml of hydrochloric acid solution with a concentration of 0.5mol / L, and then add The 2g 4a molecular sieve after roasting, after stirring at constant temperature ...

Embodiment 2

[0039] Embodiment 2: Modified 4a molecular sieve adsorbent and preparation method thereof, the specific operations are as follows:

[0040] (1) Pulverize the 4a molecular sieve with chemical composition weight percentage of C 5%, O 52%, Na2%, Mg 2%, Al 10%, Si 24%, Cl 2%, Ca 2%, Fe 2%, and sieve To a particle size of 20-100 mesh;

[0041] (2) Add 2mol / L hydrochloric acid solution to 4a molecular sieve, the solid-to-liquid ratio is 1:10, then the mixture is stirred at a constant temperature at 95°C for 2 hours, filtered and washed until PH = 7, and dried at 70°C for 7 hours Afterwards, roasting for 3 hours, the roasting temperature is 250 ℃;

[0042] (3) Weigh 0.23g of ruthenium chloride trihydrate and put it into a beaker, add 2.8ml of deionized water, stir and dissolve to prepare a ruthenium chloride solution, then add 1.6ml of hydrochloric acid solution with a concentration of 5mol / L, and then add roasting The final 2g 4a molecular sieve was stirred at constant temperature...

Embodiment 3

[0047] Embodiment 3: Modified 4a molecular sieve adsorbent and preparation method thereof, the specific operations are as follows:

[0048] (1) The weight percentage of the chemical composition is C 6%, O 48%, Na 3%, Mg 2%, Al 15%, Si 22%, Cl 2%, Ca 2%, Fe 1% 4a molecular sieves, and sieve To a particle size of 20-100 mesh;

[0049] (2) Add 8mol / L hydrochloric acid solution to 4a molecular sieve, the solid-to-liquid ratio is 1:30, then the mixture is stirred at a constant temperature at 60°C for 4 hours, filtered and washed until PH=7, and dried at 90°C for 4 hours Afterwards, roast for 1 hour at a roasting temperature of 300°C;

[0050] (3) Weigh 0.1g of ferric chloride hexahydrate into a beaker, add 4ml of deionized water, stir and dissolve to prepare ferric chloride solution, then add 0.4ml of hydrochloric acid solution with a concentration of 8mol / L, and then add 2g of 4a molecular sieves, stirred at constant temperature for 4 hours, and left to stand for 8 hours;

[00...

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Abstract

The invention discloses a modified 4a molecular sieve adsorbent and a preparation method of the modified 4a molecular sieve adsorbent, which mainly aim at adsorption and purification research of heavy metals (mercury, lead and cadmium) in garbage burning smoke. A transition metal is loaded on a 4a molecular sieve to prepare the adsorbent, wherein the content of the transition metal is 1-10% and the adsorbent has a good adsorption effect on the heavy metals; secondary pollution is not generated in a smoke purification process; and the price is low and the economic feasibility is high.

Description

technical field [0001] The invention relates to a modified 4a molecular sieve adsorbent and a preparation method thereof, belonging to the field of air pollution control Background technique [0002] Garbage is born along with human production and life. With the acceleration of industrialization and urbanization, the discharge of municipal solid waste in my country has increased sharply, and its total amount is increasing at a rate of about 8-10% per year, which has obviously exceeded the average growth rate of 3-5% in developed countries. Municipal solid waste has become a recognized environmental problem that is difficult to deal with all over the world. Improper disposal of municipal solid waste has brought great harm to the environment. [0003] Waste incineration power generation can better achieve the goals of waste treatment reduction, resource utilization, and harmless treatment, and has the advantages of small footprint, stable operation, fast processing speed, an...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/30
Inventor 马丽萍毛宇张杭戴取秀谢龙贵陈建涛马俊
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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