Method for preparation of load type metallic catalyst and equipment thereof

A catalyst and supported technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of uneven distribution of active components, low metal dispersion, Solve the problems of large metal loading and achieve the effects of low cost, high metal dispersion and high catalytic activity

Inactive Publication Date: 2007-12-05
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The active components of supported catalysts prepared by traditional preparation methods are often uneve

Method used

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  • Method for preparation of load type metallic catalyst and equipment thereof
  • Method for preparation of load type metallic catalyst and equipment thereof
  • Method for preparation of load type metallic catalyst and equipment thereof

Examples

Experimental program
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Example Embodiment

[0031] Example 1:

[0032] Put the weighed sodium borohydride NaBH 4 Dissolve in 200ml deionized water, then add 10g of γ-Al 2 O 3 , Fully stirred to form a slurry, then transferred to the product storage tank 9; the weighed chloroplatinic acid H 2 PtCl 6 Dissolve in 50 l deionized water, and transfer the chloroplatinic acid solution to the metal salt solution storage tank 2, start the infusion pump 8 to make NaBH 4 And γ-Al 2 O 3 The mixed slurry circulates between the product storage tank 9 and the tubular reactor 4, the flow rate is 800ml / min, the ultrasonic generator 5 is started, the transmission frequency is set to 60 kHz, the temperature of the water bath is 60 ℃, and the metering pump 1 is set to 1.0 The rate of ml / min will be H 2 PtCl 6 The solution is injected into the hollow ceramic tube 10 in the tubular reactor 4, H 2 PtCl 6 The solution diffuses through the micropores of the hollow ceramic membrane tube wall 10 to contain NaBH 4 And γ-Al 2 O 3 In the mixed slurry, wh...

Example Embodiment

[0033] Example 2:

[0034] The weighed sodium borohydride (NaBH 4 ) Dissolve in 300ml deionized water, then add 15g of γ-Al 2 O 3 , Fully stirred to form a slurry, then transferred to the product storage tank 9; the weighed rhodium chloride (RhCl 3 ) And chloroauric acid (HAuCl 4 ) Dissolve in 100 ml of deionized water and transfer to the metal salt solution storage tank 2. Start the infusion pump 8 to make NaBH 4 And γ-Al 2 O 3 The mixed slurry circulates between the product storage tank 9 and the tubular reactor 4, the flow rate is 500ml / min, the ultrasonic generator 5 is started, the frequency of the ultrasonic generator is set to 40 kHz, the temperature of the water bath is 40 ℃, and the metering pump 1 The rhodium chloride (RhCl 3 ) And chloroauric acid (HAuCl 4 ) Is injected into the pipe of the hollow ceramic membrane tube 10 in the tubular reactor 4. RhCl 3 And HAuCl 4 The mixed solution diffuses through the micropores on the wall of the hollow ceramic membrane tube 10 to ...

Example Embodiment

[0035] Example 3:

[0036] Put the weighed sodium borohydride NaBH 4Dissolve in 200ml deionized water, then add 10g of γ-Al 2 O 3 , Fully stirred to form a slurry and then transferred to the product storage tank 9; the weighed palladium nitrate (Pd(NO 3 ) 2 ·2H 2 O) Dissolve in 50ml deionized water, and transfer the palladium nitrate solution to the metal salt solution storage tank 2, start the infusion pump 8 to make NaBH 4 And γ-Al 2 O 3 The mixed slurry circulates between the product storage tank 9 and the tubular reactor 4, the flow rate is 500ml / min, the ultrasonic generator 5 is started, the transmission frequency is set to 120 kHz, the temperature of the water bath is 60°C, and the metering pump 1 is set to 10ml The palladium nitrate solution was injected into the pipe of the hollow ceramic tube 10 in the tubular reactor 4 at a rate of 1 / min, and the palladium nitrate solution diffused through the micropores of the hollow ceramic membrane tube wall 10 to contain NaBH 4 And ...

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Abstract

The present invention belongs to the field of catalyst preparing technology, and is especially supported nanometer metal catalyst preparing process and apparatus. The process includes diffusing metal salt solution from metering pump to mixed slurry solution comprising reductant and carrier material through the micropores in the ceramic film pipe under ultrasonic introduction for metal ion to be adsorbed and reduced in the surface of catalyst carrier, the subsequent centrifugal separation, washing the precipitant with deionized water, stoving and burning to form the supported nanometer metal catalyst. The present invention has the advantages of homogeneous distribution of active catalyst component, small size, high metal dispersion, etc.

Description

technical field [0001] The invention relates to a method for preparing a supported nano catalyst, which belongs to the field of preparing nano catalytic materials. The method for preparing a supported nano catalyst can be used for preparing catalysts for automobile tail gas treatment, hydrogenation catalysts, petroleum refining catalysts and other fine chemicals. Catalyst preparation. Background technique [0002] At present, the traditional preparation methods for preparing supported catalysts mainly include impregnation method, co-precipitation method, ion exchange method and precipitation reduction method. The active components of the supported catalyst prepared by the traditional preparation method are often unevenly distributed, the metal dispersion is low, the metal loading is large, and the production cost is high. In addition to being related to the composition of the catalyst, the activity of the catalyst is also related to the particle size of the catalytically ac...

Claims

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Application Information

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IPC IPC(8): B01J23/38B01J23/72
Inventor 何洪关晓戴洪兴訾学红
Owner BEIJING UNIV OF TECH
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