Process for producing high-stability central-hole material Cu-Zn-Al2O3, and application of the same in producing mellow wine dehydrogenating catalyst

Abstract

The invention discloses a synthetic method of a mesoporous material Cu-Zn-Al2O3 with high stability and the application in making an alcohol dehydrogenation catalyst, and belongs to the technical field of organic synthesis; the mesoporous material Cu-Zn-Al2O3 taking salt of copper, zinc, aluminum as raw materials, surfactants as templates, is synthesized at one step under a neutral or alkaline condition. The mesoporous material Cu-Zn-Al2O3 is used as a carrier in the preparation of the alcohol dehydrogenation catalyst, other Cu and Zn are loaded in the holes of the mesoporous material through sedimentation; while the masterbatch is made into a novel alcohol dehydrogenation catalyst after washing, drying, granulating, roasting and molding. Compared with the traditional catalyst made by coprecipitation method, the catalyst has the advantages of high catalytic activity, good product selectivity, etc.

Description

1. Technical field [0001] The invention discloses a highly stable mesoporous material Cu-Zn-Al 2 o 3 The synthesis method and its application in the preparation of alcohol dehydrogenation catalyst belong to the technical field of organic synthesis. 2. Background technology [0002] Cu-Zn-Al 2 o 3 Catalysts are widely used in industrial production processes such as low-pressure methanol synthesis reaction, organic alcohol dehydrogenation reaction, organic aldehyde hydrogenation reaction, water-gas shift reaction, methanol water-steam reforming reaction, synthesis gas one-step synthesis of dimethyl ether, and fuel cells. It is a kind of catalyst with a wide range of uses; with the large-scale industrial production equipment and the improvement of automatic production level, Cu-Zn-Al 2 o 3 The performance of the catalyst puts forward higher and higher requirements, and the development of high-performance Cu-Zn-Al 2 o 3 Catalysts undoubtedly have extremely huge economic v...

AI Technical Summary

Problems solved by technology

[0002] Cu-Zn-Al 2 o 3 Catalysts are widely used in industrial production processes such as low-pressure methanol synthesis reaction, organic alcohol dehydrogenation reaction, organic aldehyde hydrogenation reaction, water-gas shift reaction, methanol water-steam reforming reaction, synthesis gas one-step synthesis of dimethyl ether, and fuel cells. It is a kind of catalyst with a wide range of uses; with the large-scale industrial production equipment and the improvement of automatic production level, Cu-Zn-Al 2 o 3 The performance of the catalyst puts forward higher and higher requirements, and the development of high-performance Cu-Zn-Al 2 o 3 Catalysts undoubtedly have extremely huge economic value and social benefits, especially in the reaction of alcohol dehydrogenation to ketones and aldehydes, because many side reactions are involved in it, so higher requirements are placed on the performance of the catalyst. The Cu -Zn-Al 2 o 3 Catalysts are generally prepared by co-precipitation; for example, Chinese invention patents CN100360228C and CN1101262C respectively prepared Cu-Zn-Al by co-precipitation 2 o 3 Second-butanol dehydrogenation catalyst, the performance of the catalyst prepared by the co-precipitation method is not satisfactory, mainly in the small surface area, resulting in low activity of the catalyst; in addition, the small pores of the catalyst lead to low selectivity of the product, not only The yield of the product is reduced, and the energy consumption of the separation is increased, which seriously restricts the improvement of the economic benefit of the production enterprise

Due to the limitations of the preparation method itself, it is difficult to significantly improve the performance of the catalyst by the co-precipitation method, and a new catalyst preparation method must be sought

[0003] Mesoporous molecular sieve is a new type of material with regular pore structure, and its specific surface is generally 500m 2 More than / g, the main obstacle of existing mesoporous materials as catalysts is that their pore walls are thin (2-3nm), thermal stability is poor, and the structure is easy to collapse; another shortcoming is that the heteroatom content is low (generally low more than 20%), when the heteroatom content is high, it is difficult to form a regular mesoporous material, and as a result, there are fewer active sites in the formed mesoporous material, resulting in a lower overall activity of the catalyst; how to improve the thermal stability of the mesoporous material And its heteroatom content is the key to its application in the field of catalysis

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