A kind of supported oxidative esterification catalyst and its preparation method and application

A technology of oxidative esterification and catalyst, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, carboxylate preparation, etc., which can solve the problem of high palladium content, failure to meet market demand, and low efficiency and other issues, to achieve the effects of structural stability, good cycle stability, catalytic activity and high selectivity
CN107519892BActive Publication Date: 2019-11-22DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2019-11-22

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Abstract

The object of the present invention is to provide a supported oxidative esterification catalyst and its preparation method and application, wherein the supported oxidative esterification catalyst is made of Al 2 O 3 , one or two or three oxides of MgO, CaO and SiO 2 The composite oxide prepared as a raw material is used as a carrier, gold (Au) and cobalt (Co) are used as active components, and lanthanide elements are supported. The method is to support active components and the like on a carrier through a chemical uniform precipitation method to prepare an efficient and stable oxidative esterification catalyst. In addition to the advantages of high conversion rate and good selectivity, the method also has the characteristics of low consumption of precious metals, high utilization rate and good stability. The catalyst is used for the catalytic synthesis of methyl methacrylate, and its catalytic activity and selectivity exceed those of the existing catalysts. The conversion rate of methacrolein is up to 100%, and the selectivity of methyl methacrylate is up to 97%. The post-treatment cost of other by-products acetal and carboxylic acid. The catalyst has good cycle stability.
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Description

technical field

[0001] The invention belongs to the field of oxidative esterification catalysts, and in particular relates to a supported oxidative esterification catalyst and its preparation method and application. Under the conditions of the catalyst of the present invention, methacrolein and methanol are used as raw materials in the presence of an oxidant Direct oxidative esterification produces methyl methacrylate. Background technique

[0002] Methyl methacrylate is an important organic chemical raw material with a wide range of uses. It is mainly used as a polymerized monomer to produce its polymers and copolymers, and can also be used to produce high-carbon methacrylate through transesterification. Its polymer is a plastic material with excellent transparency, so it is often called plexiglass, and has excellent characteristics such as excellent weather resistance. It is also used in the production of acrylic resin, molding compound, acrylic paint, PVC additives, Adh...

Claims

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