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Nickel-based catalyst prepared through solid-phase thermal dispersion and preparation method thereof

A nickel-based catalyst, catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as active component loading, and achieve the effects of promoting dispersion, improving stability and simple process

Inactive Publication Date: 2011-06-15
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there have been no reports on the preparation of supported nickel-based catalysts by loading the active components on the carrier by solid-phase dispersion technology and combining the organic system to reduce the catalyst.

Method used

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  • Nickel-based catalyst prepared through solid-phase thermal dispersion and preparation method thereof

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Effect test

Embodiment 2

[0028] Adopt the same method with embodiment 1, just use 5.30g Ni(CH 3 COO) 2 .4H 2 O as a nickel salt precursor. The prepared catalyst was used for evaluation in the catalytic hydrogenation reaction of p-nitrophenol. When the reaction was carried out for 760 minutes, the conversion rate of p-nitrophenol was 99.5%, and the product selectivity was 99.6%.

Embodiment 3

[0030] Adopt the same method with embodiment 1, just use 6.19g Ni (NO 3 ) 2 .6H 2 O as a nickel salt precursor. The prepared catalyst was used for evaluation in the catalytic hydrogenation reaction of p-nitrophenol. When the reaction was carried out for 800 min, the conversion rate of p-nitrophenol was 99.5%, and the product selectivity was 99.5%.

Embodiment 4

[0032] Adopt the same method with embodiment 1, just use 5.60g NiSO 4 .6H 2 O as a nickel salt precursor. The prepared catalyst was used for evaluation in the catalytic hydrogenation reaction of p-nitrophenol. When the reaction was carried out for 540 minutes, the conversion rate of p-nitrophenol was 99.5%, and the product selectivity was 99.6%.

[0033] The catalysts prepared in the above Examples 1-4 were used in the catalytic hydrogenation reaction of p-nitrophenol, and the activity of the catalysts was compared by the conversion rate of the raw materials and the selectivity of the products. The hydrogenation reaction of p-nitrophenol catalyzed by the above four kinds of catalysts, when the conversion rate of p-nitrophenol and the selectivity of p-aminophenol all reach more than 99.5%, it can be seen from the complete comparison of the time required for the reaction that nickel acetate and Nickel nitrate is the catalyst prepared by the precursor of nickel salt, the reacti...

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Abstract

The invention relates to a supported nickel-based catalyst and a preparation method thereof. The active ingredient of the catalyst is nickel, and the nickel accounts for 5 to 30 percent of the total mass of the catalyst; and silica, active carbon, silica gel, a molecular sieve or alumina is taken as a carrier. In the preparation method, the active ingredient is supported on the surface of the carrier by a solid-phase dispersion method, the dispersibility of the active ingredient is improved and the interaction force between the active ingredient and the carrier is enhanced through the heat treatment process, and a catalyst precursor is reduced through the liquid phase reduction process. Compared with the traditional immersion method, the method has the advantages that: a filtering and drying step is saved, the operating process is more simple, the catalyst preparation cost is low, the energy consumption is low, the method is environment-friendly, the activity of the prepared catalyst is equal to that of the catalyst prepared by the immersion method, and the method is suitable for industrial amplification production of the supported nickel-based catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a supported nickel-based catalyst and a preparation method thereof. Background technique [0002] Nickel-based catalyst is a widely used catalyst, which is mostly used in various hydrogenation reactions, such as pyrolysis gasoline hydrogenation, benzene hydrogenation, nitro reduction and other reactions, and has high catalytic activity and selectivity. It can replace The noble metal catalyst reduces the preparation cost of the catalyst and has a very wide application in industrial production. Among them, nickel-based catalysts mainly include amorphous alloy nickel-based catalysts (such as Ni-B), skeleton nickel catalysts (Raney Ni), supported nickel-based catalysts, and the like. The catalytic activity of amorphous alloy nickel-based catalyst in benzene hydrogenation reaction is higher than that of skeleton nickel, but the specific surface area of ​​the ...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J29/072C07C215/76C07C213/02
Inventor 张利雄白玉婷曾昌凤王重庆徐南平
Owner NANJING UNIV OF TECH
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