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Precious-metal-free formaldehyde-eliminating supported catalyst and preparation method thereof

A supported catalyst and formaldehyde elimination technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problem of high preparation cost, and achieve the effect of simple preparation process, reasonable design and low cost

Inactive Publication Date: 2019-02-01
SHANXI XINHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly aims at the disadvantage of high preparation cost of existing noble metal-based high-efficiency formaldehyde purification materials, and provides a formaldehyde-eliminating supported catalyst with high reactivity to indoor low concentration, simple preparation process and low cost and a preparation method thereof, and the catalyst Does not contain any precious metal components

Method used

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  • Precious-metal-free formaldehyde-eliminating supported catalyst and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0018] The preparation method of the above-mentioned catalyst is as follows: take a certain weight of activated carbon, adopt an equal-weight impregnation method, and measure deionized water according to the water capacity of the activated carbon; weigh compound A and inorganic ammonium B to add a good amount of deionized water, and stir until After fully dissolving, prepare the impregnating liquid; pour the prepared impregnating liquid evenly on the activated carbon carrier, and keep stirring. After fully impregnating, put the mixture into a sealed bag, let it stand for 1~4 hours, and then bake it at a certain temperature Drying, the drying temperature is 40℃~160℃.

[0019] The catalyst uses activated carbon as a carrier material. The carrier material is a porous adsorption material with a large specific surface area and a reasonable pore structure distribution, including but not limited to activated carbon. Activated carbon can be replaced by other porous adsorption materials...

Embodiment 1

[0022] Take 100g of coal-based (diameter 20mm) columnar activated carbon, measure a certain weight of deionized water according to the water capacity of the activated carbon, choose 2-imidazolidinone for compound A, choose ammonium sulfate for inorganic ammonium B, and take 8g of 2-imidazolidinone , take 5g of ammonium sulfate (that is, the addition ratio between 2-imidazolidinone and ammonium sulfate is 8:5) into a good amount of deionized water, stir until fully dissolved, pour the prepared impregnation solution on the activated carbon, and Stir constantly, wait until fully impregnated, place for 2 hours and then dry at 120°C.

Embodiment 2

[0024] Take 100g of coal-based (diameter 20mm) columnar activated carbon, take a certain weight of deionized water according to the water capacity of the activated carbon, choose 2-imidazolidinone for amine compound A, and choose ammonium sulfate for inorganic ammonium B, where 2-imidazolidinone Take 15g, take 6.43g of ammonium sulfate (that is, the addition ratio between 2-imidazolidinone and ammonium sulfate is 7:3), add it to a good amount of deionized water, stir until it is fully dissolved, and pour the prepared impregnation solution on the activated carbon and keep stirring until fully impregnated, place for 2 hours and then dry at 120°C.

[0025] Catalyst prepared by the present invention sees the following table 1 to the elimination effect of formaldehyde:

[0026] Table 1 Catalyst to the elimination effect of formaldehyde

[0027]

[0028] It can be seen from the table that the catalysts prepared in the examples of the present invention have good protection and el...

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Abstract

The invention discloses a precious-metal-free formaldehyde-eliminating supported catalyst, which selects active carbon as a carrier material, and uses a compound A and inorganic ammonium B as active components, wherein the loading amounts of the compound A and the inorganic ammonium B respectively are 1-20% of the weight of the carrier material, and the compound A and the inorganic ammonium B areadded according to a certain ratio. The preparation method comprises: weighing a certain weight of active carbon, adopting an equal amount impregnation method, and taking deionized water according tothe water capacity of the active carbon; weighing a compound A and inorganic ammonium B, adding to the metered deionized water, and stirring until fully dissolving to prepare an impregnation liquid; and uniformly pouring the prepared impregnation liquid into the active carbon carrier, continuously stirring, loading the mixture into a sealing bag after fully impregnating, standing for 1-4 h, and drying at a certain temperature of 40-160 DEG C. According to the present invention, no precious metal component is loaded during the preparation, and the compared to the preparation process of the precious metal adding, the preparation process of the present invention is simple, and has the low cost.

Description

technical field [0001] The invention belongs to the field of preparation of purification materials, in particular to a supported catalyst for eliminating formaldehyde without precious metals and a preparation method. Background technique [0002] With the development of social economy and the improvement of residents' living standards, the health problems caused by indoor air pollution have attracted more and more attention. As a kind of indoor air pollutant with strong carcinogenic effect, formaldehyde has increasingly become a new hot spot of public attention due to its wide source, high toxicity and long incubation time. [0003] At present, there are many ways to control indoor formaldehyde pollution. The current research focuses on adsorption technology, ozone technology, and photocatalytic technology. Adsorption technology mainly uses materials with high specific surface area such as activated carbon and molecular sieve to adsorb formaldehyde, which is simple and easy...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01D53/86B01D53/72
CPCB01D53/8668B01D2257/708B01J31/0234B01J31/0244
Inventor 安丽花裴佩金彦任郭军军王德周赵婷齐嘉豪武越孙晓敏黄英张金凤王慧
Owner SHANXI XINHUA CHEM
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