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Thermometal modified SBA-15 catalyst, preparation method and application thereof

A catalyst and bimetallic technology, applied in the field of bimetallic modified catalysts, can solve the problems of complex catalyst preparation process and achieve excellent catalytic performance, simple synthesis process and good temperature tolerance

Inactive Publication Date: 2014-02-19
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The present invention aims to solve the problem that the existing catalysts used for gas-phase selective catalytic oxidation of alcohols to prepare corresponding aldehydes or ketones cannot take into account low temperature, high selectivity, high activity, better temperature tolerance, and longer service life, and the preparation of the catalyst In order to solve the problem of complex process, we provide bimetallic modified SBA-15 catalyst, its preparation method and application

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0036] Specific embodiment 1: The molecular formula of the bimetal modified SBA-15 catalyst of this embodiment is xCu-yAg / SBA-15, where x is the mass percentage of metal Cu in the catalyst, and x is 0.01%-20 %; The y is the mass percentage of the metal Ag in the catalyst, and y is 1%-30%.

[0037] The bimetal modified SBA-15 catalyst of this embodiment is prepared by an impregnation method, and the catalyst introduces the active components onto the surface of the SBA-15 carrier.

[0038] The catalyst described in this embodiment has high activity, strong selectivity, excellent catalytic performance, high product purity, and reduces the cost of separation and purification; and the catalyst has good temperature tolerance and is in a wide temperature range (220 ℃~400℃), has stable catalytic performance, stable structure in continuous gas phase reaction, long service life and easy activation and regeneration.

specific Embodiment approach 2

[0039] Specific embodiment 2: The preparation method of the bimetal modified SBA-15 catalyst of this embodiment is carried out according to the following steps:

[0040] Impregnate the SBA-15 carrier in Cu 2+ / Ag + In the mixed aqueous solution, magnetically stirred at a temperature of 20℃~100℃ and a speed of 60 revolutions / min~1000 revolutions / min for 2h~24h, filtered to obtain a solid catalyst, and then put the obtained solid catalyst at a temperature of Drying in an oven at 50℃~200℃ for 1h~48h, and then calcining at 400℃~700℃ for 1h~24h to obtain bimetal modified SBA-15 catalyst xCu-yAg / SBA-15; x is the mass percentage of metal Cu in the catalyst, x is 0.01%-20%; the y is the mass percentage of metal Ag in the catalyst, y is 1%-30%; the Cu 2+ / Ag + The cation in the mixed aqueous solution is Cu 2+ And Ag + , And the Cu 2+ / Ag + Cu in mixed aqueous solution 2+ The concentration is 0.001mol / L~5mol / L, the Cu 2+ / Ag + Ag in mixed aqueous solution + The concentration is 0.001mol / L~5...

specific Embodiment approach 3

[0045] Specific embodiment three: this embodiment is different from specific embodiment two in that: the Cu 2+ / Ag + The anion in the mixed aqueous solution is , or . Others are the same as the second embodiment.

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PUM

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Abstract

The invention discloses a thermometal modified SBA-15 catalyst, a preparation method and application thereof, relates to the thermometal modified catalyst, the preparation method and application thereof, and aims to solve the problems that the existing catalyst for preparing corresponding aldehyde or ketone by adopting gaseous phase selectivity catalytic oxidation of alcohol does not combine the advantages of low temperature, high selectivity, high activity, better thermal tolerance and longer service life and is complicated in preparation process. The molecular formula of the thermometal modified SBA-15 catalyst is xCu-yAg / SBA-15, wherein x and y refer to the mass percents of Cu and Ag in the catalyst respectively. The preparation method comprises the following steps: dipping the SBA-15 carrier into the mixed Cu<2+> / Ag<+> aqueous solution, heating, magnetic stirring, drying and roasting to obtain the thermometal modified SBA-15 catalyst. The thermometal modified SBA-15 catalyst disclosed by the invention is used for preparing corresponding aldehyde or ketone in a catalysis manner by adopting low temperature gaseous phase selectivity catalytic oxidation of alcohol.

Description

Technical field [0001] The invention relates to a bimetal modified catalyst, its preparation method and application. Background technique [0002] The pure silicon SBA-15 mesoporous molecular sieve has a long-range ordered one-dimensional pore structure, the mesopore size can be adjusted in the range of 4.6nm to 30nm, the pore wall is thick, the specific surface area is high, the hydrothermal stability is good, and there are a lot of surface The silanol is easy to modify. At the same time, the preparation of nano-active phases by the confinement effect of its regular nano-space is one of the effective methods to prepare functional nano-materials, so it is widely used in the catalysis and adsorption industries. [0003] Bimetal modified catalysts often produce some effects that are better than single metals due to the simultaneous existence of intermetallic and active component and carrier interactions. [0004] In recent years, bimetal modified supported catalysts doped with Cu as ...

Claims

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Application Information

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IPC IPC(8): B01J29/035C07C45/38C07C45/39C07C47/54C07C49/786C07C49/403C07C49/395C07C47/02C07C47/127C07C47/232
Inventor 贾丽华马良郭祥峰
Owner QIQIHAR UNIVERSITY