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Preparation of room temperature formaldehyde catalyst

A catalyst and formaldehyde technology, applied in the direction of catalyst carrier, molecular sieve catalyst, physical/chemical process catalyst, etc., can solve the problems of unfavorable commercial application, high price, cumbersome catalyst preparation process, etc.

Inactive Publication Date: 2015-02-11
江苏瑞丰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst still contains 0.1-2% noble metals as active components, which is expensive, and the catalyst preparation process is cumbersome, which is not conducive to commercial application

Method used

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  • Preparation of room temperature formaldehyde catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Vector preparation

[0021] Accurately weigh 51 g of silicon oxide, 35 g of aluminum oxide and 14 g of magnesium oxide, mix and stir evenly, and add 10 g of kaolin, 1.0 g of carboxymethyl cellulose, 0.5 ml of paraffin oil and a certain amount of water, stir to form a slurry, squeeze Pressed into a honeycomb shape, aged for 24 h, 80 o C, 4h dry, 1350 o C, 4h high-temperature calcination to obtain cordierite honeycomb carrier;

[0022] (2) Carrier modification treatment

[0023] The above-mentioned honeycomb cordierite carrier was immersed in a solution containing 10% nitric acid for 2 hours, and after taking it out, it was washed for 60 o C, 2h to dry.

[0024] (3) Preparation of catalyst

[0025] According to the water absorption of the carrier, prepare a mixed solution of manganese nitrate and lanthanum nitrate with a certain concentration, soak the above carrier in the solution for 4 hours, take it out, dry it naturally, and mix with 80 o C, 2h dry, with 500...

Embodiment 2

[0027] (4) Vector preparation

[0028] Accurately weigh 51 g of silicon oxide, 35 g of aluminum oxide and 14 g of magnesium oxide, mix and stir evenly, and add 10 g of kaolin, 1.0 g of carboxymethyl cellulose, 0.5 ml of paraffin oil and a certain amount of water, stir to form a slurry, squeeze Pressed into a honeycomb shape, aged for 24 h, 80 o C, 4h dry, 1350 o C, 4h high-temperature calcination to obtain cordierite honeycomb carrier;

[0029] (5) Carrier modification treatment

[0030] The above-mentioned honeycomb cordierite carrier was immersed in a solution containing 10% nitric acid for 6 hours, and after taking it out, it was subjected to 100o C, 1h to dry.

[0031] (6) Preparation of catalyst

[0032] According to the water absorption rate of the carrier, prepare a mixed solution of tetraethyl orthosilicate and nickel nitrate with a certain concentration, soak the above carrier in the solution for 6 hours, take it out, dry it naturally, and mix it with 100 o C, 1h...

Embodiment 3

[0034] (1) Vector preparation

[0035] Accurately weigh 100 g of zeolite powder, add 20 g of kaolin, 1.5 g of carboxymethyl cellulose, 0.5 ml of paraffin oil and a certain amount of water, mix and stir evenly into mud, extrude into strips, and age for 24 h. 80 o C, 4h dry, 500 o C, 4h high temperature roasting;

[0036] (2) Carrier modification treatment

[0037] The above-mentioned strip-shaped zeolite carrier was immersed in 10% hydrogen peroxide solution for 4 hours, and after taking it out, it was heated at 80 o C, 2h to dry;

[0038] (3) Preparation of catalyst

[0039] According to the water absorption rate of the carrier, prepare a mixed solution of copper nitrate and ferric nitrate with a certain concentration, soak the above carrier in the solution for 2 hours, take it out, dry it naturally, and mix with 60 o C, 2h dry, with 350 o C, 2h calcination in air atmosphere to produce CuO-FeO x / Zeolite catalyst. The metal oxide loading of the catalyst is 15.0 wt%, ...

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Abstract

Belonging to the technical field of adsorption catalysis and air pollution control, the invention relates to preparation of a room temperature formaldehyde catalyst. The invention is characterized in that: zeolite, sepiolite, a porous activated carbon material, cordierite or a self-made carrier is adopted as the catalyst carrier, one or more non-noble metal oxides, like magnesium oxide, aluminum oxide, silicon oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, zirconium oxide, lanthanum oxide or cerium oxide are taken as active components, and an impregnation technique is employed to prepare the catalyst, which can be powdery, strip, blocky, spherical or honeycomb. The loading amount of the non-noble metal oxides is 2-15wt%, and the content of the catalyst carrier is 85-98%. Under normal temperature and ambient humidity conditions, the catalyst has the capacity of catalytic oxidation of formaldehyde into non-toxic and harmless CO2 and H2O up to over 95%, no intermediate product is generated, and the catalyst has the characteristics of high catalytic oxidation activity, strong moisture resistant ability, stable operation, long service life and the like, thus being suitable for formaldehyde purification treatment in offices, office buildings, living rooms, shopping malls, hospitals, hotels and other places.

Description

Technical field [0001] The present invention is the preparation of normal temperature formaldehyde catalysts, which involves the field of adsorption catalytic and air pollution control technology. It belongs to a variety of non -valuable metal oxide coordinated catalytic oxide.It is characterized by porous adsorption inorganic materials as a carrier and one or more non -valuable metal oxide activity components. It is made of solution.One of them, this catalyst can effectively degrade the formaldehyde of air pollutants under normal temperature and humidity conditions, which has the characteristics of high catalytic oxidation activity, strong moisture resistance, stable operation, long life and other characteristics., Hospital, hotel and other places, formaldehyde purification treatment. Background technique [0002] With the rapid development of the national economy and the gradual improvement of the people's material living standards, the increasing popularity and configuration o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/755B01J23/75B01J23/06B01J29/00B01J35/10B01J32/00B01D53/86B01D53/72
Inventor 杜峰
Owner 江苏瑞丰科技实业有限公司
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