Catalyst used for preparing methyl isobutyl ketone and diisobutyl ketone by acetone condensation as well as preparation method and application of catalyst

Abstract

The invention relates to a catalyst used for preparing methyl isobutyl ketone and diisobutyl ketone by acetone condensation as well as a preparation method and application of the catalyst, and belongsto the field of acetone condensation catalysts. The catalyst used for preparing the methyl isobutyl ketone and the diisobutyl ketone by the acetone condensation comprises the following components, inpercentages by weight: (1) 2%-25% of copper or an oxide of the copper, (2) 8%-35% of zinc or an oxide of the zinc, (3) 2%-40% of cobalt or an oxide of the cobalt, (4) 1%-10% of barium or an oxide ofthe barium, (5) 30%-80% of aluminum oxide, and (6) 1%-40% of silicon dioxide. The catalyst provided by the invention uses the copper, the zinc, the cobalt and the like as loading components, the balance of acidity and alkalinity of the catalyst is properly adjusted, and the catalyst with a suitable catalyst pore structure is prepared; the catalyst is used at a lower reaction temperature, and has avery high conversion rate of acetate, less by-products, a high product yield, and low subsequent separation energy consumption; and after long-term evaluation, the catalyst shows ideal stability.

Description

technical field [0001] The invention relates to the field of acetone condensation catalysts, and more specifically, relates to a catalyst for preparing methyl isobutyl ketone and diisobutyl ketone by condensation of acetone, a preparation method and application thereof. Background technique [0002] Methyl isobutyl ketone (MIBK for short) is a colorless transparent liquid with a camphor-like smell. MIBK is mainly used in medium boiling point solvents and raw materials for organic synthesis. In terms of solvent use, compared with commonly used solvents (such as acetone, ethyl acetate, cyclohexanone, methyl ethyl ketone, etc.), MIBK has the characteristics of low volatility, good compatibility, and non-toxicity. High-grade solvent used in adhesive, epoxy resin and other industries. As a paint solvent, MIBK has excellent properties (good leveling, hard paint film, moderate volatility, can prepare low-viscosity solutions and prevent gelation), which makes it have broad applica...

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Problems solved by technology

[0004] The industrialized acetone one-step synthesis of MIBK is generally carried out under high pressure, and Pd / resin catalyst is mostly used. Although a higher MIBK yield can be obtained, its life is short, the resin is not resistant to high temperature and regeneration is difficult. During the research process of isobutyl ketone, the development of catalysts has been uninterrupted. The research on catalysts in the field of MIBK synthesis has made great progress. One-step synthesis of MIBK with high yield and conversion rate under certain process conditions, thereby shortening the process flow and increasing product yield

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