Double-metal MOF (Metal-Organic Framework) catalyst as well as preparation method and application thereof

Abstract

The invention relates to a double-metal MOF (Metal-Organic Framework) catalyst. Two inorganic metal centers and an organic ligand are self-assembled through a coordination bond to form a three-dimensional cage-shaped structure; the specific surface area is 170 to 1,145m<2> / g, the pore capacity is 0.18 to 0.48cm<3> / g and the average pore diameter is 1.34 to 3.55nm; any two types of nitrate of metalcopper, nickel, cobalt and cerium are used as metal precursors, one of trimesic acid, 2-methylimidazole or terephthalic acid is used as a synthesis ligand and a suitable solvent is selected to synthesize the double-metal MOF catalyst. A double-metal MOF material is used as a catalyst and p-diethylbenzene is used as a raw material; the p-diethylbenzene is catalytically oxidized in a fixed bed to prepare p-ethylacetophenone. The method provided by the invention has the advantages of mild reaction conditions, simplicity in operation, high p-diethylbenzene conversion rate and high p-ethylacetophenone selectivity; a product and the catalyst are easy to separate and the catalyst is stable in performance; reaction is applied to fixed bed reaction to realize continuous production, so that the method has a wide industrial application prospect.

Description

technical field [0001] The invention relates to a bimetallic MOF catalyst, a preparation method and an application, and belongs to the field of material and chemical technology research. Background technique [0002] p-Ethylacetophenone is a chemical that has attracted much attention at home and abroad in recent years. It is widely used in the production of fine chemicals such as photochromic materials, drugs, and liquid crystals, and has broad development prospects. At present, there is no large-scale production of p-ethylacetophenone in China, and the industrial use of p-ethylacetophenone mainly depends on imports. Therefore, the development of a green, simple and economical synthesis process of p-ethylacetophenone has a huge market prospect. [0003] The traditional production process of p-ethylacetophenone is the Friedel-Crafts acylation reaction, but the large amount of catalyst used in this reaction and the difficulty in recovery make this reaction difficult to apply o...

AI Technical Summary

Problems solved by technology

[0008] (1) A large amount of catalyst is used in the reaction process, and the catalyst-product after the reaction is not easy to separate, which not only causes waste of resources, but also causes environmental pollution;

[0009] (2) A large amount of acid needs to be added in the reaction process to produce a large amount of salty wastewater, which makes the wastewater treatment process extremely complicated, which is not conducive to industrial scale-up, and puts forward higher requirements for the anti-corrosion performance of the equipment, thereby increasing the equipment investment cost;

[0010] (3) The catalyst preparation process is complicated, the cost is high, and the cost of recovery after use is relatively large;

[0011] (4) The reaction cycle is long, the reaction efficiency is low, and the target product selectivity is low;

[0012] (5) The reaction temperature is high, the energy consumption is large, the operating cost is greatly improved, and certain hidden dangers are brought to safety

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