Efficient ecotype inorganic formaldehyde adsorbing material and preparation method thereof

A formaldehyde adsorption and ecological technology, applied in the field of inorganic adsorption materials with aldehyde removal function and its preparation, can solve the problems of limited adsorption capacity and unsatisfactory adsorption effect, and achieve low preparation cost, good durability, and impermeability good sex effect

Inactive Publication Date: 2011-01-12
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, solid adsorbents based on various types of activated carbon and its products have unsatisfactory adsorption effects, mainly because activated carbon is composed of non-polar molecules; by adjusting raw materials and preparation processes, activated carbon can be enriched with carboxyl, phenol, carbonyl, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 200g of fly ash, and the alkali content of 45g is 10mol / L[OH - ] NaOH solution, 30g reaction activator wherein sodium water glass is 20g, particle diameter is 1500 order Al 2 o 3 10g.

[0031] (2) Mix the above-mentioned raw materials and stir evenly, and the materials are powdery.

[0032](3) Put the uniformly stirred materials into a curing box, and cure them for 24 hours at a temperature of 50° C. and a humidity of 70%.

[0033] (4) After the cured material is placed in the natural environment for 24 hours, it is ground with a ball mill until the particle size is below 20 μm.

[0034] (5) Continue curing the ground material for 10 days in the natural environment to obtain a powdery sample, marked as sample A.

[0035] Put 200g of sample A into a test box with a volume of 40L, and put samples of the same amount of formaldehyde pollution sources made of glass sheets into the box, so as to maintain a certain formaldehyde concentration in the box, and the s...

Embodiment 2

[0037] (1) Weigh 200g of kaolin, the alkali content of 80g is 10mol / L[OH - ] KOH solution, 40g reaction activator (wherein potassium water glass is 32g, particle diameter is 1000 order Al 2 o 3 8g.

[0038] (2) Mix the above raw materials, stir evenly, and the material is in the form of paste.

[0039] (3) Granulate the uniformly stirred material on a disc granulator to obtain spherical particles with a diameter of 3-4 mm.

[0040] (4) Put the granulated granules into the curing box, and take them out after curing for 24 hours under the condition of temperature of 70°C and humidity of 65%, and continue curing in the natural environment for 10 days to obtain granular samples, which are marked as samples b.

[0041] The method in Example 1 was used to test the aldehyde removal effect of sample B, and the results are listed in Table 1.

[0042] Example 3

[0043] (1) Weigh 200g of waste incineration ash, and the alkali content of 110g is 5mol / L[OH - ]Na 2 CO 3 Solution, ...

Embodiment 4

[0049] (1) Weigh 160g of fly ash, 40g of slag, and the alkali content of 45g is 6mol / L[OH - ] K 2 CO 3 Solution, 30g reaction activator, wherein potassium water glass is 24g, particle diameter is 1000 mesh Al 2 o 3 6g.

[0050] (2) Mix the above-mentioned raw materials and stir evenly, and the materials are powdery.

[0051] (3) Press the powdery material on a powder tablet press with a pressure of 90 MPa, and after 1 minute of constant pressure, demould, and maintain at a temperature of 40° C. and a humidity of 50% for 24 hours.

[0052] (4) Continue curing for 10 days in the natural environment to obtain a block sample, marked as sample D.

[0053] The method in Example 1 was used to test the aldehyde removal effect of sample D, and the results are listed in Table 1.

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Abstract

The invention relates to an efficient ecotype inorganic formaldehyde adsorbing material which is obtained by mixing and curing 50%-75% of a solid raw material containing aluminosilicate, 10-40% of alkaline solution and 10%-15% of a complex reaction activator, wherein the solid raw material containing the aluminosilicate comprises at least one of the following raw materials: clay, kaolin, coal gangue, fly ash, waste incineration ash, slag, red mud and the like; alkali content of the alkaline solution is 3-12mol/L[OH-]; and the complex reaction activator comprises two components at mass ratio of 75-85% of a silicate substance and 15-25% of Al2O3 particle size of which is more than 1000 meshes. The inorganic adsorbing material is of a net porous gel structure, total pore volume is 0.17mL/g-0.36mL/g, specific surface area is 300-650m<2>/g, and pore distribution mainly adopt two modes of micropores (pore diameter is less than 2nm) and mesopores (pore diameter is 2-50nm), wherein the pore volume of the micropores (45%-60%) and the mesopores (25%-50%) accounts for 85%-95% of the total pore volume. The inorganic adsorbing material comprises 80-95% of an amorphous component and 5-20% of a crystal component based on the total mass of the material.

Description

technical field [0001] The invention relates to an inorganic adsorption material that can be used for indoor air purification, in particular to an inorganic adsorption material with the function of removing aldehydes and a preparation method thereof. Background technique [0002] With the continuous heating up of interior decoration and the wide application of various building materials, the resulting indoor air pollution has attracted more and more attention. Among them, the main pollutants are from paint, plywood, particle board, interior wall paint, plastic Formaldehyde, benzene, VOCs (Volatile Organic Compounds) and other volatile organic compounds in veneers and other materials. At present, formaldehyde is the main pollutant in newly decorated homes in my country, and has been identified as a class I carcinogen by the World Health Organization. The modern scientific research shows: formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal p...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/30B01D53/04
Inventor 韩敏芳黄毅
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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