Preparation method of catalyst for high efficient catalytic degradation of harmful gas PH3

A catalytic decomposition and harmful gas technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of secondary pollution tail gas, poor economic benefits, incomplete treatment, etc., achieve high activity, promote phosphating Hydrodehydrogenation, the effect of easy separation and recovery

Inactive Publication Date: 2018-05-22
天津格林凯恩化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most domestic manufacturers of sodium hypophosphite use the method of oxidizing phosphine into phosphoric acid, which will not only cause secondary pollution and incomplete tail gas treatment, but also have poor economic benefits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A high-efficiency catalytic decomposition of toxic and harmful gas PH 3 The preparation method of the catalyst includes the following steps: 1) Slowly pour 50 mL of 20% concentrated sulfuric acid into 5 g of natural halloysite nanotubes, and heat in a water bath at 80 °C. After magnetic stirring for 4 h, it was cooled and filtered with suction, and washed with water until neutral. The washed solid was dried at 80°C for 4 h, cooled and ground into powder for use; 2) 2.5 g of acid-treated HNTs was dissolved in 20 mL of toluene and 3 mL of 3-aminopropyltriethoxysilane , mixed evenly, heated in an oil bath at 120°C, condensed and refluxed for 12 h, filtered with suction after the reaction was completed, and dried at 100°C for 5 h. The product modified by aminosilane on the surface of HNTs is obtained, which is denoted as HNTs-NH 2 ; 3) Add 1 g HNTs-NH 2 Dissolved in 20 mL of SnCl 2 solution, after magnetic stirring for 20 min, add 20 mL of PdCl 2 The solution was magne...

Embodiment 2

[0015] A high-efficiency catalytic decomposition of toxic and harmful gas PH 3 The preparation method of the catalyst includes the following steps: 1) Slowly pour 50 mL of 20% concentrated sulfuric acid into 5 g of natural halloysite nanotubes, and heat in a water bath at 80 °C. After magnetic stirring for 4 h, it was cooled and filtered with suction, and washed with water until neutral. Dry the washed solid at 80°C for 4 h, cool it and grind it into powder for use; 2) Dissolve 2 g of acid-treated HNTs in 20 mL of toluene and 3 mL of 3-aminopropyltriethoxysilane, mix uniform. Heated in an oil bath at 120°C, condensed and refluxed for 12 h, filtered with suction after the reaction was completed, and dried at 100°C for 5 h. The product modified by aminosilane on the surface of HNTs is obtained, which is denoted as HNTs-NH 2 ; 3) Add 0.5 g HNTs-NH 2 Dissolved in 20 mL of SnCl 2 solution, after magnetic stirring for 20 min, add 20 mL of PdCl 2 The solution was magnetically s...

Embodiment 3

[0017] A high-efficiency catalytic decomposition of toxic and harmful gas PH 3 The preparation method of the catalyst includes the following steps: 1) Slowly pour 50 mL of 20% concentrated sulfuric acid into 5 g of natural halloysite nanotubes, and heat in a water bath at 80 °C. After magnetic stirring for 4 h, it was cooled and filtered with suction, and washed with water until neutral. The washed solid was dried at 80°C for 4 h, cooled and ground into powder for use; 2) 1.5 g of acid-treated HNTs was dissolved in 20 mL of toluene and 3 mL of 3-aminopropyltriethoxysilane ,well mixed. Heated in an oil bath at 120°C, condensed and refluxed for 12 h, filtered with suction after the reaction was completed, and dried at 100°C for 5 h. The product modified by aminosilane on the surface of HNTs is obtained, which is denoted as HNTs-NH 2 ; 3) Add 0.5 g HNTs-NH 2 Dissolved in 20 mL of SnCl 2 solution, after magnetic stirring for 20 min, add 20 mL of PdCl 2 The solution was magne...

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PUM

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Abstract

The invention discloses a preparation method of a catalyst for high efficient catalytic degradation of harmful gas PH3. According to the preparation method, low cost natural halloysite nano tubes (HNTs) are taken as the carrier; nickel chloride, ferric chloride, and ferrous sulfate are taken as the precursors; based on a chemical plating technology, and a nickel nano clad layer is plated on the halloysite nano tubes (HNTs) to form a one-dimensional shell/core structure. Then through a co-precipitation method, Fe3O4 nano particles are loaded on the nickel clad layer surface in a dotted mode toform a one dimensional shell/dual core structure. The preparation method has the advantages that there is no severe requirement on physical conditions, the method is simple, the price of HNTs is low,and the efficiency of using the catalyst to degrade PH3 catalytically is high, and the service life is long.

Description

technical field [0001] The invention relates to efficient catalytic decomposition of toxic and harmful gas PH 3 Catalyst preparation, especially a preparation method of a highly efficient and cheap transition metal and metal oxide composite catalytic decomposition phosphine catalyst. Background technique [0002] Phosphine is a highly toxic, flammable, and explosive gas. It is one of the main industrial tail gases produced by phosphorus chemical enterprises, such as sodium hypophosphite production enterprises. my country is also a major producer of phosphorus chemical products in the world today. Proper treatment of industrial phosphine tail gas is very necessary. At present, domestic methods for purifying phosphine can be divided into dry method and wet method. However, most domestic manufacturers of sodium hypophosphite use the method of oxidizing phosphine to phosphoric acid, which will not only cause secondary pollution and incomplete tail gas treatment, but also have p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01D53/86B01D53/46
CPCB01J23/755B01D53/8671
Inventor 不公告发明人
Owner 天津格林凯恩化工科技有限公司
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