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Environment-friendly formaldehyde purification catalyst and preparation method thereof

A formaldehyde purification and catalyst technology, which is applied in the directions of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of long time for formaldehyde purification and complicated preparation methods, and achieves improved photocatalytic purification capacity and preparation. The method is simple and the removal rate is improved

Inactive Publication Date: 2021-02-19
广州绿然环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing formaldehyde purification time that is relatively long and the preparation method is relatively complicated, and provide an environment-friendly formaldehyde purification catalyst and its preparation method

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of an environment-friendly formaldehyde purification catalyst, the preparation method comprising the following steps:

[0031] (1) Mix and dissolve 0.03mol of chromium nitrate and 0.01mol of 2-aminoterephthalic acid in 200mL of water, leave it at 2200°C for 50 hours, cool to room temperature and then centrifuge. Vacuum dry at ℃ for 10 hours, then disperse the dried solid in water, mix well, add a certain amount of praseodymium nitrate and neodymium nitrate, continue to stir for 9 hours, filter and soak the obtained filter cake with washing liquid, and finally in Vacuum drying at 130°C for 6 hours to obtain the chromium-based metal-organic framework composite material;

[0032] (2) Place the chromium-based metal-organic framework composite material obtained in step (1) in a quartz boat, -1 The heating rate was heated to 550°C and calcined for 2 hours, and then cooled to room temperature to obtain chromium oxide co-modified by praseodymium and neodym...

Embodiment 2

[0035] A preparation method of an environment-friendly formaldehyde purification catalyst, the preparation method comprising the following steps:

[0036] (1) Mix and dissolve 0.04mL chromium chloride and 0.01mol 2-amino 4,4'-biphenyldicarboxylic acid in 150mL water and 50mL N,N-dimethylformamide mixed solvent, and seal it at 240°C Let it stand for 40 hours, cool to room temperature and then centrifuge. The resulting precipitate is soaked with N,N-dimethylformamide and then vacuum-dried at 120°C for 6-14 hours. Then the dried solid is dispersed in water and mixed thoroughly. After uniformity, add a certain amount of praseodymium chloride and neodymium acetate, continue to stir for 12 hours, filter and soak the obtained filter cake with washing solution, and finally vacuum dry at 150°C for 2 hours to obtain the chromium-based metal organic framework composite material;

[0037] (2) Put the chromium-based metal-organic framework composite material obtained in step (1) in a quart...

Embodiment 3

[0040] A preparation method of an environment-friendly formaldehyde purification catalyst, the preparation method comprising the following steps:

[0041] (1) Mix and dissolve 0.005mol of chromium sulfate and 0,02mol of α-amino-2,6-naphthalene dicarboxylic acid in 200mL of acetic acid, leave it at 180°C for 60 hours, cool to room temperature and centrifuge, and use the precipitate After soaking in the washing solution, dry it in vacuum at 120°C for 14 hours, then disperse the dried solid in water, mix well, add a certain amount of praseodymium acetate and neodymium chloride, continue to stir for 6 hours, and filter the obtained filter cake Rinse with washing solution, and finally vacuum dry at 60°C for 10 hours to obtain the chromium-based metal-organic framework composite material;

[0042] (2) Put the chromium-based metal-organic framework composite material obtained in step (1) in a quartz boat, -1 The heating rate was heated to 500 ° C and calcined for 3 hours, and then c...

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Abstract

The invention belongs to the technical field of formaldehyde purification, and particularly relates to an environment-friendly formaldehyde purification catalyst and a preparation method thereof. Thepurification catalyst is carbon-coated praseodymium and neodymium co-modified chromium oxide, the modification loading capacity of praseodymium relative to chromium oxide is 1-3wt%, and the modification loading capacity of neodymium relative to chromium oxide is 1-3wt%. The purification catalyst is prepared by the following steps: preparing a chromium-based metal organic framework, modifying components by using metal, conducting roasting, and wrapping a carbon layer by using a solvothermal method. Through co-modifying of praseodymium and neodymium, by using the synergistic effect of praseodymium and neodymium, effective separation of photo-induced electrons and holes is promoted, and the photocatalytic purification capacity of chrome oxide is improved. The formaldehyde adsorption capacityis improved by coating a layer of carbon, and the formaldehyde is purified by utilizing active groups produced by a photocatalyst, so that the purification catalyst is an ideal material for formaldehyde purification.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde purification. More specifically, it relates to an environment-friendly formaldehyde purification catalyst and a preparation method thereof. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent odor, the chemical expression is HCHO or CH 2 O, with a molecular weight of 30.0, is also known as formaldehyde. Although formaldehyde is a colorless substance, it is very irritating to the eyes, nose and other sense organs. The relative density of formaldehyde gas is 1.067 (the relative density of air is 1), the density of formaldehyde solution per cubic centimeter is 0.815g, the melting point temperature is -92°C, and the boiling point temperature is -19.5°C. Formaldehyde is also highly irritating to human skin and mucous membranes. If people are exposed to high concentrations of formaldehyde for a long time, people will have headaches, general weakness and other disc...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J21/18B01J37/02B01J37/08B01J35/10B01D53/72B01D53/86
CPCB01J23/22B01J21/18B01J37/0215B01J37/086B01D53/8668B01D2257/708B01D2258/06B01D2255/802B01J35/397B01J35/61B01J35/39
Inventor 陈永红
Owner 广州绿然环保新材料科技有限公司
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