Catalyst, preparation method and application for hydrogenation synthesis of p-aminophenol

A technology of p-aminophenol and its synthesis method, which is applied in the field of catalysts and its preparation, can solve the problems of no magnetism, lower utilization rate of ferric oxide, and no further improvement of catalytic activity, so as to improve conversion rate and selectivity and facilitate popularization And industrial application, easy to collect and recycle effect
CN109847762BActive Publication Date: 2022-04-19NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2022-04-19

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Abstract

The invention discloses a catalyst for hydrogenation synthesis of p-aminophenol, which comprises: a core, and a mesoporous silica shell covering the core, and the material of the core includes noble metal-magnetic oxide. The core of the catalyst in the present invention is composed of "noble metal-magnetic oxide". Because it is wrapped by the outer shell, the strong interaction between the contact interface of "noble metal and magnetic oxide" can be enhanced under the condition of avoiding agglomeration, which can greatly improve the catalyst performance. At the same time, due to the existence of magnetic oxides, they can be separated by magnets, which is convenient for recycling and improves the utilization rate. At the same time, the present invention also provides a preparation method of the catalyst, the preparation method is simple and easy to operate, the size and size of the product can be adjusted according to the needs, and it is applied to the hydrogenation reaction of p-nitrophenol, which can improve the conversion rate and selectivity of the reaction. sex.
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Description

Technical field

[0001] The present invention relates to a catalyst for hydrogenation to synthesize p-aminophenol reaction and a preparation method thereof, particularly to a catalyst may be applied to the hydrogenation of p-nitrophenol to synthesize p-aminophenol reaction and a preparation method thereof. Background

[0002] P-nitrophenol is a common intermediate in organics, widely used in medicine, dye rubber and other fields. At present, the production methods of p-aminophenol include the reduction method of p-nitro iron powder, the catalytic hydrogenation method of nitrobenzene and so on. Nitrobenzene catalytic hydrogenation method uses nitrobenzene as a raw material to catalytically reduce hydrogenation in an acidic medium, and the precious metal reuse rate of such methods is low and the selectivity is not high.

[0003] The patent under publication number CN106311274A discloses a catalyst that loads Ru on silica, a magnetic core that can be easily recycled. However, the si...

Claims

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