Catalyst to produce methyl methacrylate efficiently at low cost and preparation method of catalyst

Abstract

The invention discloses a preparation method of a catalyst to produce methyl methacrylate efficiently at low cost. The catalyst is made by a polymeric protection process and is a supported catalyst with an active center supported on a support; the active center includes gold and a rare-earth metal; the support is one of SiO2, SiO2-Al2O3, CaCO3, carbon material, and molecular sieve material; the catalyst is 0.05-0.98% by weight in gold loading capacity and 1-2.5% by weight in rare-earth metal loading capacity. The preparation method is suitable for preparing a gold particulate catalyst having uniform particle size and high activity; the preparation process is simple; the preparation method is convenient to perform; active component loading capacity is low; the catalyst has excellent activity and good stability; the catalyst is prepared at low cost; methylacrolein conversion rate and MMA (methyl methacrylate) selectivity are high; the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for producing methyl methacrylate with low cost and high efficiency and a preparation method thereof. Background technique [0002] Methyl methacrylate (methyl methacrylate, MMA) is an important organic polymer monomer. Polymethyl methacrylate (PMMA, also known as plexiglass) prepared from it is widely used in national defense industry, construction , transportation, advertising decoration, culture, education and sanitation, instrumentation, daily necessities and other fields; in addition, it also has many applications in water-soluble paints, latex paints, etc. [0003] At present, the production processes of MMA in the world mainly include acetone nitrile alcohol method (ACH method), isobutylene method and ethylene method. In the global MMA production capacity, the acetone cyanohydrin method accounts for 83%, the isobutylene method accounts ...

AI Technical Summary

Problems solved by technology

But this catalyst catalyzes that methacrolein is converted into MMA reaction, and catalytic condition is harsh, and the conversion rate of methacrolein and the selectivity of MMA are not ideal enough, especially in the industrial scale-up test, the selectivity to MMA is not high, affects product quality

The active center of MMA series catalysts plays a major role in the noble metal Au, and its high price is the main reason for the high cost of catalysts, which also limits its popularization and application.

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