Preparing method and application of novel compound boron nitride adsorbing material

An adsorption material, boron nitride technology, which is applied in the synthesis field of new composite boron nitride adsorption materials, can solve the problems that cannot be used under high temperature and special extreme conditions, and achieve good chemical stability, simple method and high purity. Effect

Active Publication Date: 2019-05-03
SHENYANG AEROSPACE UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0010] The method adopts three-step synthesis: the first step is to synthesize the precursor of porous boron nitride with melamine (nitrogen source), boric acid (nitrogen source) and additives; the second step is to combine the composite precursor obtained in the first step with the The porogen is doped and mixed under a protective atmosphere, and pyrolyzed at high temperature; in the third step, the obtained cracked produ

Method used

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  • Preparing method and application of novel compound boron nitride adsorbing material
  • Preparing method and application of novel compound boron nitride adsorbing material
  • Preparing method and application of novel compound boron nitride adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of novel composite boron nitride adsorption material:

[0037] (1) 0.1 gram of cetyl ethoxy sulfobetaine, 1.89 gram of melamine and 1.85 gram of boric acid are added to 100 ml of deionized water respectively, stirring makes boric acid and melamine evenly distributed in water, and it is placed in Heat to 85°C in a constant temperature shaking shaker, and keep shaking at this temperature to dissolve and keep warm for 4 hours;

[0038] (2) Slowly lower the temperature of the solution in step (1) to 25°C, a white flocculent precipitate precipitates, keep the temperature for 2 hours and then filter with suction to obtain a white solid precipitate, put it into an oven at 80°C drying in medium for 24 hours to obtain the precursor;

[0039] (3) Weighing 30wt% ammonium sulfate and adding it to the precursor obtained in step (2), using an agate mortar to grind and fully mix the two;

[0040] (4) Heat the solid powder obtained in step (3) in a nitrog...

Embodiment 2

[0047] The operating oscillation incubation time of step (1) in Example 1 was changed by 2 hours and 8 hours respectively, and other operations were all the same as in Example 1, and the product obtained was the same as in Example 1.

Embodiment 3

[0049] The operation of step (2) in Example 1 is lowered to temperature and changed to 20°C and 30°C respectively, and other operations are the same as in Example 1, and the product obtained is the same as in Example 1.

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Abstract

The invention provides a preparing method of a novel compound porous boron nitride material which has a high adsorption capacity for heavy metal and fine particulate matter in high-temperature flue gas. The preparing method is environmentally friendly and can achieve recycling. The preparing method comprises three synthesis steps that 1, melamine (a nitrogen source), boric acid (a nitrogen source)and an additive are utilized for synthesizing a precursor of porous boron nitride; 2, the compound precursor obtained in step 1 and a pore-forming agent are doped and mixed under protective atmosphere, and high-temperature thermal cracking is conducted; 3, an obtained cracking product is put into a solution containing a surfactant for washing and drying to obtain the novel compound boron nitrideadsorbing material with a high specific surface area and a high activity. By means of the method, the defect that an existing adsorbent cannot be utilized under high-temperature and special extreme conditions is overcome, and the preparing method has a good application prospect in the field of high-temperature adsorption.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a synthesis method of a novel composite boron nitride adsorption material used for adsorbing heavy metals and fine particles in high-temperature flue gas. Background technique [0002] The three common crystal structures of boron nitride are hexagonal boron nitride (h-BN), wurtzite boron nitride (w-BN), and cubic boron nitride (c-BN). The novel composite porous boron nitride in the present invention is exactly hexagonal boron nitride. Porous boron nitride is a new type of material with high specific surface area, stable chemical properties, high temperature resistance and other excellent characteristics, and the B-N bond has a local polarity that C-C bonds do not have, so that it can be used as a stable material under high temperature or extreme conditions. Highly efficient adsorbent material used. [0003] In recent years, many scholars have found that...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F11/00B01D53/02B01J20/02B01J20/28
Inventor 李彦龙陈洋李润东杨天华
Owner SHENYANG AEROSPACE UNIVERSITY
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