A kind of stainless steel mesh supported platinum catalyst and its application

A platinum catalyst and stainless steel technology, which is applied in physical/chemical process catalysts, incinerators, organic chemistry, etc., can solve the problems of insufficient catalytic activity of the catalyst, narrow application area of ​​the carrier, and many preparation steps to achieve high stability and high efficiency. Selective, wide-ranging effects

Active Publication Date: 2016-01-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as narrow carrier application and many preparation steps.
[0004] Chinese patent 200810059778.40 relates to another stainless steel wire mesh carrier anodized film loaded noble metal catalyst, which expands the application area of ​​the carrier, but the catalytic activity of the obtained catalyst is not high enough
In contrast, the Chinese patent 200810062376.X stainless steel wire mesh anodized film carrier supports a rare earth metal-noble metal catalyst, which has higher catalytic activity, but due to the active component of the catalyst (Ce-Pt-Pd / stainless steel wire mesh) The precious metal in the battery adopts Pt-Pd two-component, the cost is relatively high, how to reduce the cost and maintain the activity is a problem that needs to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] ●Roll the 200-mesh stainless steel wire mesh into a column, and immerse it in 0.1mol / L HCl solution to remove impurities on the surface of the wire mesh. The immersion time is 3 minutes.

[0021] ●A certain amount of Pt 2 (dba) 3 The mixture was added to propylene carbonate (PC) to obtain a mixture, and the mixture was stirred and reacted at room temperature in a hydrogen atmosphere of 3 MPa. After 2 hours, the stirring was stopped and the solution was taken out to obtain a PC solution containing 0.01 mol / L Pt nanoparticles.

[0022] ● Immerse the columnar stainless steel wire mesh in the above-mentioned PC solution containing 0.01 mol / LPt nanoparticles, the immersion time is 24 hours, and the immersion temperature is 25°C.

[0023] ●Take out the stainless steel wire mesh and dry it at 120°C to obtain the Pt / SSWM catalyst.

[0024] The above catalyst is used to treat volatile organic waste gas, specifically: the prepared Pt / SSWM catalyst is placed in a fixed-bed micro...

Embodiment 2

[0027] ●Roll the 200-mesh stainless steel wire mesh into a column, and immerse it in 0.1mol / L HCl solution to remove impurities on the surface of the wire mesh. The immersion time is 3 minutes.

[0028] ●A certain amount of Pt 2 (dba) 3 The mixture was added to propylene carbonate (PC) to obtain a mixture, and the mixture was stirred and reacted at room temperature in a hydrogen atmosphere of 1 MPa. After 2 hours, the stirring was stopped and the solution was taken out to obtain a PC solution containing 0.02 mol / L Pt nanoparticles.

[0029] ● Immerse the columnar stainless steel wire mesh in the above PC solution containing 0.02mol / LPt nanoparticles, the immersion time is 24 hours, and the immersion temperature is 25°C.

[0030] ●Take out the stainless steel wire mesh and dry it at 120°C to obtain the Pt / SSWM catalyst.

[0031] The above catalyst is used to treat volatile organic waste gas, and the reaction steps are the same as in Example 1. The results show that the comple...

Embodiment 3

[0034] ●Roll the 200-mesh stainless steel wire mesh into a column, and immerse it in 0.1mol / L HCl solution to remove impurities on the surface of the wire mesh. The immersion time is 3 minutes.

[0035] ●A certain amount of Pt 2 (dba) 3 The mixture was added to propylene carbonate (PC) to obtain a mixture, and the mixture was stirred and reacted at room temperature in a hydrogen atmosphere of 3MPa. After 2h, the stirring was stopped and the solution was taken out to obtain a PC solution containing 0.04mol / L Pt nanoparticles.

[0036] ● Immerse the columnar stainless steel wire mesh in the above PC solution containing 0.04mol / LPt nanoparticles, the immersion time is 24 hours, and the immersion temperature is 25°C.

[0037] ●Take out the stainless steel wire mesh and dry it at 120°C to obtain the Pt / SSWM catalyst.

[0038] The above catalyst is used to treat volatile organic waste gas, and the reaction steps are the same as in Example 1. The results show that the complete conver...

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PUM

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Abstract

The invention discloses a stainless steel wire gauze platinum-loaded catalyst and application thereof. A preparation method for the stainless steel wire gauze platinum-loaded catalyst comprises the following steps of adding Pt2(dba)3 into propylene carbonate to obtain a mixture, and performing stirring reaction on the mixture under the hydrogen atmosphere of 1-3MPa at room temperature, stopping stirring after 1-2 hours, and taking out a solution to obtain a propylene carbonate solution containing Pt nano particles; immersing a stainless steel wire gauze carrier which is treated by hydrochloric acid and is of 100-300 meshes into the propylene carbonate solution containing the Pt nano particles, taking out the stainless steel wire gauze after the stainless steel wire gauze is treated for 6-24 hours at the temperature of 25-100 DEG C, drying the stainless steel wire gauze to obtain the stainless steel wire gauze platinum-loaded catalyst. The stainless steel wire gauze platinum-loaded catalyst can be applied to reaction of preparation of o-chloroaniline through VOCs catalytic combustion or o-chloronitrobenzene in-situ liquid-phase hydrogenization. The catalyst disclosed by the invention has the advantages of simple preparation technology, readily available raw materials, high catalysis activity and high stability.

Description

technical field [0001] The invention relates to a platinum catalyst supported by a stainless steel wire mesh and its application in the treatment of volatile organic compound (VOCs) waste gas and in-situ liquid-phase hydrogenation of o-chloronitrobenzene to prepare o-chloroaniline. Background technique [0002] It is well known that catalytic supports play a crucial role in catalytic reactions. In recent years, the main research direction on catalysts has focused on the development of new supports. In a large number of studies on new supports, metal supports have gradually become a research hotspot. Due to the demand for practical application of catalysts and higher requirements for high-stability carriers, stainless steel wire mesh has attracted the attention of scientific and technological workers because of its good ductility, good heat resistance, wear resistance and corrosion resistance. The use of stainless steel wire mesh as the carrier can overcome the complex prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/02F23G7/07C07C211/52C07C209/36
Inventor 严新焕敖平
Owner ZHEJIANG UNIV OF TECH
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