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Microwave synthesis method used for multi-phase oxidation catalyst of hydrogen phosphide

An oxidation catalyst and microwave synthesis technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low absorption efficiency and slow reaction speed, and achieve Improved absorption efficiency, rapid synthesis, and less catalyst usage

Inactive Publication Date: 2010-08-18
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has been found in practical applications that hydrogen peroxide is used to absorb phosphine tail gas, and the absorption efficiency is low due to its slow reaction speed.

Method used

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  • Microwave synthesis method used for multi-phase oxidation catalyst of hydrogen phosphide
  • Microwave synthesis method used for multi-phase oxidation catalyst of hydrogen phosphide
  • Microwave synthesis method used for multi-phase oxidation catalyst of hydrogen phosphide

Examples

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example 1

[0020] Example 1: Dissolve cerium nitrate in distilled water to make a solution with a cerium ion concentration of 0.01mol / L; soak 4A zeolite with a particle size of 180 mesh in 0.1mol / L sodium hydroxide solution for 1 hour, after soaking Repeatedly wash with distilled water several times, then soak in 0.1mol / L hydrochloric acid solution for 1 hour, wash repeatedly with distilled water after soaking, and finally soak in distilled water for 1 hour, filter and dry at 105°C for 12 hours; after pretreatment Finally, add it into the prepared solution according to the solid-liquid mass ratio of 1:5, stir at room temperature for more than 4 hours, soak for 20 hours, and then filter; put the dried filter cake in a microwave synthesizer, microwave power 80W, Heated for 30 minutes, and sieved to obtain a 180-mesh catalyst; the prepared catalyst was added to the hydrogen peroxide solution at a mass ratio of 1:200. When preparing sodium hypophosphite, the materials of the reactor are 10.0...

example 2

[0022] Example 2: Dissolve ferric nitrate in distilled water to make a solution with an iron ion concentration of 0.5 mol / L; soak diatomite with a particle size of 110 mesh in 0.1 mol / L sodium hydroxide solution for 1 hour, soak After that, wash repeatedly with distilled water several times, then soak in 0.1mol / L hydrochloric acid solution for 1 hour, wash repeatedly with distilled water after soaking, and finally soak in distilled water for 1 hour, filter and dry at 118°C for 12 hours; After treatment, add it into the prepared solution according to the solid-liquid mass ratio of 1:18, stir at room temperature for more than 5 hours, soak for 19 hours, and then filter; put the dried filter cake in a microwave synthesizer with a microwave power of 540W , treated for 18 minutes, and sieved to obtain a 110-mesh catalyst; the prepared catalyst was added to the hydrogen peroxide solution at a mass ratio of 1:100. When preparing sodium hypophosphite, the material in the reactor is 9....

example 3

[0025] Example 3: Dissolve copper nitrate in distilled water to make a solution with a copper ion concentration of 1mol / L; soak activated carbon with a particle size of 40 mesh in 0.1mol / L sodium hydroxide solution for 1 hour, and rinse with distilled water after soaking Repeated washing several times, then soaking with 0.1mol / L hydrochloric acid solution for 1 hour, repeated washing with distilled water after soaking, and finally soaking in distilled water for 1 hour, filtering and drying at 130°C for 12 hours; after pretreatment, Put it into the prepared solution according to the solid-liquid mass ratio of 1:30, stir at room temperature for more than 6 hours, soak for 18 hours, and then filter; put the dried filter cake in a microwave synthesizer, microwave power 1000W, and treat for 5 minutes , and sieved to obtain a 40-mesh catalyst; the prepared catalyst was added to the hydrogen peroxide solution at a mass ratio of 1:100. When preparing sodium hypophosphite, the material...

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Abstract

The invention relates to a microwave synthesis method used for a multi-phase oxidation catalyst of hydrogen phosphide, which belongs to the technical field of industrial waste gas purification treatment. The method comprises the following steps: dissolving nitrate in distilled water to prepare a metal ion solution; firstly, carrying out pretreatment on a carrier; then dipping in the metal ion solution under stirring, filtering to obtain a filter cake and then baking; putting the dried filter cake in a microwave synthesizer for synthesis to obtain a catalyst product. The synthesis method is convenient and rapid, and the prepared catalyst can obviously improve the absorption efficiency of a hydrogen dioxide solution on hydrogen phosphide; the catalyst has better stability and lower use level, does not contain impurities and can be repeatedly used.

Description

technical field [0001] The invention relates to a microwave synthesis method for a phosphine heterogeneous oxidation catalyst, which belongs to the technical field of industrial waste gas purification and treatment. Background technique [0002] In the production of yellow phosphorus, there will be a waste residue-sludge phosphorus composed of elemental phosphorus, dust impurities and water. In order to recover phosphorus in mud phosphorus, studies have shown that it is an effective treatment method to prepare sodium hypophosphite by reacting mud phosphorus with lye, the reaction temperature is not high, energy consumption is not large, and sodium hypophosphite is used as a reducing agent , Widely used in chemical plating, electroplating, machinery, food processing and other industries, with high economic added value. However, this treatment method will convert about 20% of the phosphorus in the mud phosphorus into phosphine and enter the tail gas. If it is not treated, it ...

Claims

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Application Information

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IPC IPC(8): B01J37/34B01J23/745B01J23/72B01J23/06B01J23/50B01J23/10B01D53/86B01D53/46
Inventor 黄小凤刘伟文宁平谭娟王小妮李文卿高琨阳魏燕富
Owner KUNMING UNIV OF SCI & TECH
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