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Co-Fe-B amorphous alloy catalyst, its preparation method and application

A technology of amorphous alloy and catalyst, which is applied in the field of Co-Fe-B amorphous alloy catalyst and its preparation, can solve the problems of insufficient catalytic activity and selectivity, and achieve excellent catalytic activity and selectivity, excellent catalytic performance and The effect of activity selectivity and easy operation

Inactive Publication Date: 2005-09-14
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 Co-Fe-B amorphous alloy catalyst to overcome the defects of insufficient catalytic activity and selectivity in the prior art;

Method used

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  • Co-Fe-B amorphous alloy catalyst, its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] KBH 4 A mixed solution with a concentration of 2mol / L and a NaOH concentration of 0.2mol / L was added dropwise to CoCl 2 and FeCl 3 mixed solution of Fe 3+ with Co 2+ The molar ratio of 1:5, control KBH 4 and Co 2+ and Fe 2+ The molar ratio was 5:1, and the reaction was carried out for 30 minutes to ensure the complete reduction of metal ions. The reaction temperature was 10°C, and then the prepared particles were washed with deionized water until neutral, and then washed with absolute ethanol to remove water, and the Co- Fe-B amorphous alloy catalyst, stored in absolute ethanol. The molar percentage of each component of the catalyst thus obtained is analyzed by ICP: Co: 26.9%, Fe: 5.2%, B: 67.9%, totaling 100%, and the specific surface area measured by the BET method is 55.3m 2 / g. X-ray diffraction pattern see figure 1 .

Embodiment 2～10

[0023] Using the same method as in Example 1, wherein the process parameters are shown in Table 2. Fe 3+ with Co 2+ The mol ratio is shown in Table 1:

[0024] Example

[0025] implement

Embodiment 11～16

[0027] The catalyzer of embodiment 2~10 is used for acetonitrile liquid phase selective hydrogenation to prepare ethylamine reaction, and the initial pressure of hydrogenation reaction is PH 2 =3.0MPa, the reaction temperature is controlled at 110°C, and the reaction is carried out in a 0.5L autoclave. Add 1.5g of the prepared catalyst, 30ml of acetonitrile, and 90ml of ethanol, and react until the conversion rate of acetonitrile is 100%. The results are shown in Table 3:

[0028] catalyst

[0029] It can be seen from Table 3 that the Co-B amorphous alloy catalyst doped with a certain amount of Fe can greatly increase the initial hydrogen absorption rate in the liquid phase hydrogenation reaction of acetonitrile. And the Co-Fe-B catalyst doped with 20wt% Fe has the best catalytic activity, reaching 987.4mmol / h·gCo, and the reaction rate increases by 183.3% compared with the Co-B catalyst without Fe doping.

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Abstract

The invention discloses Co-Fe-B amorphous alloy catalyst and its preparation. The mole ratios of the components are: Co: 0-32%, Fe: 0.1-32%, B: 67-70%. The catalyst of the invention passes X-ray diffraction and selective-area electronic diffraction tests, and has apparent non-crystal structure and 19-71m2 / g surface area. The catalyst is utilized to acetonitrile election hydro-preparation of ethamine. The method has simple operation and the good catalyzing and active selection to the reactions of hydro-furfural, hydro-dextrose and cinnamaldehyde.

Description

technical field [0001] The invention relates to a Co-Fe-B amorphous alloy catalyst and a preparation method thereof, in particular to a Co-Fe-B amorphous alloy catalyst used in the selective hydrogenation of liquid phase acetonitrile to prepare ethylamine Co-Fe-B amorphous alloy catalyst and a preparation method thereof. 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, Fe-B, Ru-B and other catalysts. Miscellaneous other metals have also be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C07C209/48C07C211/05
Inventor 李和兴吴跃东
Owner SHANGHAI NORMAL UNIVERSITY
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