A catalyst for the condensation of acetone to prepare methyl isobutyl ketone and diisobutyl ketone, its preparation method and application

Abstract

The invention relates to a catalyst used for the condensation of acetone to prepare methyl isobutyl ketone and diisobutyl ketone, a preparation method and application thereof, in the field of acetone condensation catalysts. The catalyst for the condensation of acetone to prepare methyl isobutyl ketone and diisobutyl ketone comprises the following components in weight percent: (1) 2% to 25% copper or its oxide; (2) 8% ~35% zinc or its oxide; (3) 2%~40% cobalt or its oxide; (4) 1%~10% barium or its oxide; (5) 30%~80% aluminum oxide; (6) ) 1%~40% silicon dioxide; the catalyst of the present invention uses copper, zinc, cobalt, etc. as loading components, properly adjusts the balance of catalyst acidity and alkalinity and hydrogenation property, and prepares a suitable catalyst pore structure. When used at a lower reaction temperature, the conversion rate of acetate is very high, and there are few by-products, the product yield is high, and the subsequent separation energy consumption is low. After a long-term assessment, the catalyst showed 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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