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Co-B/CeO2-SiO2 alloy catalyst, its preparation process and application

An alloy catalyst, catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of insufficient catalytic activity and selectivity, achieve excellent catalytic activity and selectivity, and easy to operate. , the effect of excellent catalysis and activity selectivity

Inactive Publication Date: 2005-11-23
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved in the present invention is to disclose a supported Co-B / CeO 2 -SiO 2 Amorphous alloy catalysts to overcome the defects of insufficient catalytic activity and selectivity in the prior art;

Method used

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  • Co-B/CeO2-SiO2 alloy catalyst, its preparation process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] KBH 4 A mixed solution with a concentration of 2mol / L and a NaOH concentration of 0.2mol / L was added dropwise onto the prepared carrier (CeO 2 -SiO 2 ) Ce 3+ with Co 2+ The molar ratio of 1:10, control KBH 4 and Co 2+ The molar ratio is 5:1, react for 30 minutes to ensure the complete reduction of metal ions, and the reaction temperature is about 20 °C, then wash the prepared particles with deionized water until neutral, then wash with absolute ethanol to remove water, and collect Co -B / CeO 2 -SiO 2 Amorphous alloy catalyst, stored in absolute ethanol. The molar percentage of each component of the catalyst thus prepared is analyzed by ICP: Co: 17.9, Ce: 4.53%, B: 1.31%, totaling 23.74%, and the specific surface area measured by the dehydrogenation chemisorptions method is 87.3m 2 / g. X-ray diffraction pattern see figure 1 .

Embodiment 2～5

[0029] Using the same method as in Example 1, wherein the process parameters are shown in Table 2. Ce 3+ with Co 2+ The mol ratio is shown in Table 1:

[0030] Example

2

3

4

5

The molar ratio of

1∶22.6

1∶9.6

1∶3.4

1∶4.4

[0031] Table 2 Composition, specific surface area, and dispersion of catalysts with different Ce contents

[0032] Example Catalyst System Composition M co a S act b Temperature KBH 4 Concentration D. b

[0033] (m 2 / gCo) °C (mol / L) %

[0034] 1Co-B / SiO 2 co 67.4 B 325. 17.9% 30.0 20 2 4.5

[0035] 2Co-B / CeO 2 -SiO 2 co 72.0 B 38.0 18.5% 57.6 20 2 8.6

[0036] 3Co-B / CeO 2-SiO 2 co 67.9 B 32.1 17.9% 87.3 20 2 13.1

[0037] 4Co-B / CeO 2 -SiO 2 co 70.0 B 30.0 16.0% 67.5 20 2 10.9

[0038] 5Co-B / CeO 2 -SiO 2 co 68.6 B 31.4 13.8% 37.8 20 2 5.6

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Abstract

This invention discloses a Co-B / CeO2-SiO2 amorphous alloy catalyst, in addition to a preparing method and its uses. The mole percent of each component is: Co:13.8-18.5%, Ce:0-9.72%, B: 0.9-1.75%. By the test of X-ray diffraction and selected area electron diffraction, the catalyst has obvious amorphous structure, and the specific surface area is 37- 87m2 / gCo. The catalyst can be used for furfural liquidoid selectively hydrogenation preparing furfuryl alcohol. Said method has good catalytic activity and selective not only to furfural hydrogenation, but also to acetonitrile hydrogenation, amylaceum hydrogenation and benzalacet aldehyde hydrogenation.

Description

technical field [0001] The invention relates to a loaded Co-B / CeO 2 -SiO 2 Amorphous alloy catalyst and preparation method thereof, specifically related to preparation of furfuryl alcohol-loaded Co-B / CeO by selective hydrogenation of furfural in liquid phase 2 -SiO 2 Amorphous alloy catalyst and its preparation method. Background technique [0002] Nano and amorphous alloys are the hotspots and frontiers of current catalysis research. Due to its unique structural characteristics of long-range disorder and short-range order, nano-amorphous alloys exhibit excellent catalytic activity, selectivity and resistance to sulfur poisoning in many hydrogenation reactions, and have become the most promising new materials in the 21st century. Generation Catalyst. [0003] At present, the amorphous alloy catalysts that are widely used are mainly concentrated on binary amorphous alloy catalysts, such as Ni-B, Co-B, Pt-B, Ru-B and other catalysts. Miscellaneous other metals have also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
Inventor 骆红山张斯勇李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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