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Method for preparing integrated catalyst for low-temperature catalytic oxidation of formaldehyde

A low-temperature catalysis and catalyst technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of poor mass transfer resistance, high pressure drop, difficult plasticity and other problems, to achieve the effect of good adsorption performance, pressure drop, and easy molding

Active Publication Date: 2016-10-26
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of granular or powdery catalysts such as high pressure drop, poor mass transfer resistance, and difficulty in molding (such as Chinese patent CN201410642073), it is difficult to apply them to the industrial process of formaldehyde treatment. The use of metal matrix integrated catalysts can make These problems have been solved; in addition, there is a close relationship between the oxidation of formaldehyde and water vapor, and the oxidation of formaldehyde is more effective in a water vapor atmosphere. Therefore, seeking a carrier that can provide water or hydroxyl by itself will definitely give formaldehyde more effective treatment. Bringing unprecedented prospects

Method used

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  • Method for preparing integrated catalyst for low-temperature catalytic oxidation of formaldehyde
  • Method for preparing integrated catalyst for low-temperature catalytic oxidation of formaldehyde
  • Method for preparing integrated catalyst for low-temperature catalytic oxidation of formaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] with 10wt% NaOH solution and 10wt% HNO 3 After pre-treating the aluminum plate with the solution for 4 minutes and 2 minutes, put it into the anodizing tank for anodic oxidation, and place the aluminum plate at a current density of 50A / m at 20°C 2 , anodized in 0.1-0.8mol / L oxalic acid solution for 8-16h, air-dried and roasted at 350°C for 1h; then hydrated in deionized water at 95°C for 60-70min, dried at room temperature for 12h to obtain boehmite;

[0031] The obtained Boehm bodies were placed in concentrations of 0.1g / L, 0.2g / L, 0.3g / L, 0.4g / L, 0.5g / L, 0.6g / L, 0.7g / L, 0.8g / L chloroplatinic acid solution, immersed at 25°C for 4h, and dried at room temperature for 12h; the loaded boehmite was placed in a sodium borohydride solution with a concentration of 0.05mol / L, reduced at 25°C for 1h, and dried at room temperature for 12h , to obtain an integrated catalyst. The impact of the obtained catalyst load and the concentration of chloroplatinic acid on the platinum loa...

Embodiment 2

[0037] with 10wt% NaOH solution and 10wt% HNO 3 After pre-treating the aluminum plate with the solution for 4 minutes and 2 minutes, put it into the anodizing tank for anodic oxidation, and place the aluminum plate at a current density of 50A / m at 20°C 2 , anodized in 0.4mol / L oxalic acid solution for 12 hours, air-dried and roasted at 350°C for 1 hour; then hydrated in deionized water at 80°C for 60 minutes, dried at room temperature for 12 hours to obtain boehmite;

[0038] Place the obtained Boehmite in chloroplatinic acid solution with a concentration of 0.1g / L, respectively immerse at 25°C for 1, 2, 4, 6, and 8 hours, and dry at room temperature for 12h; the loaded Boehmite Place in a sodium borohydride solution with a concentration of 0.05 mol / L, reduce at 25° C. for 1 h, and dry at room temperature for 12 h to obtain an integrated catalyst. The resulting effect of immersion time on platinum loading is shown in Table 2.

[0039] Table 2 Effect of immersion time on plat...

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Abstract

The invention relates to a method for preparing an integrated catalyst for low-temperature catalytic oxidation of formaldehyde. The method comprises the steps of conducting hydration on an aluminum sheet subjected to anodic oxidation in deionized water which is 30-95 DEG C for 5-70 min, so that a Boehm system is obtained; placing the Boehm system in a chloroplatinic acid solution with the concentration of 0.1-0.8 g / L for dipping lasting 1-8 h at 25 DEG C, and conducting drying for 12 h at normal temperature; conducting reduction for 0.5-3 h at 25 DEG C in a sodium borohydride solution with the concentration of 0.05-1 mol / L, and conducting drying for 12 h at normal temperature, so that the integrated catalyst is obtained. The catalyst prepared with the method can well adsorb methanol when applied to a methanol catalytic combustion system, and can oxidize part of methanol at normal temperature, methanol conversion rate reaches 72% at normal temperature when platinum content is 2-2.5 wt%, and complete conversion can be achieved at 60 DEG C.

Description

technical field [0001] The invention relates to a preparation method of an integrated catalyst used for low-temperature catalytic oxidation of formaldehyde, in particular to a preparation method of a novel hydroxyl-rich integrated catalyst used for formaldehyde treatment. It belongs to the field of treating volatile organic compounds (VOCs) in the atmosphere by catalytic oxidation. Background technique [0002] With the improvement of people's material living standards, various organic polymers are widely used in daily life, such as urea-formaldehyde resin adhesives often used in artificial boards such as plywood, blockboard, medium density fiberboard and particle board for interior decoration and furniture. ; film materials used in wallpaper coatings; additives added to clothing care agents and detergents used in daily life will release volatile organic compounds (Volatile Organic Compounds, VOCs) such as formaldehyde and benzene, making people live in in a very unhealthy ...

Claims

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Application Information

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IPC IPC(8): B01J23/42
CPCB01J23/42
Inventor 张琪栾红娟李涛王天宇吴勇强倪燕慧朱学栋朱子彬
Owner SHANGHAI HUAMING HI TECH GRP
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