Technique for preparing MIBK (methyl isobutyl ketone) from acetone with liquid-phase one-step process

Abstract

The invention provides a technique for preparing MIBK (methyl isobutyl ketone) from acetone with a liquid-phase one-step process. The technique comprises the following steps: hydrogen and acetone are fed into a reactor and subjected to a reaction under catalysis of gamma-Al2O3 doped hydrogen-type polystyrene cation exchange resin, and a product is delivered to an acetone recovery tower for separation; organic light components in the recovery tower are delivered to a wastewater tower, acetone is delivered back to the reactor, and heavy components at the tower bottom are delivered to a water removal tower; light components at the top of the water removal tower are delivered to an extraction tower, and a reaction product at the tower bottom is delivered to a finished product tower; purified water is adopted as an extracting agent in the extraction tower, and heavy components are delivered to the wastewater tower; MIBK is produced from a side line of the finished product tower, 2,6-dimethyl-4-heptanone and high-class ketone are produced from a tower bottom liquid. The technique is short in flow and low in energy consumption, 2,6-dimethyl-4-heptanone is co-produced, few noble metal palladium active components in a palladium supported resin catalyst are lost, stable service life as long as 7,000 h is realized, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of preparation technology of methyl isobutyl ketone and diisobutyl ketone, and particularly relates to the field of acetone liquid phase one-step preparation technology of methyl isobutyl ketone and diisobutyl ketone. Background technique [0002] Methyl isobutyl ketone (MIBK) is an excellent medium boiling point solvent and chemical intermediate. Widely used in coatings, rubber, mineral processing, medicine, fuel, oil refining and other industries. In recent years, with the rapid development of my country's coatings, rubber and other industries, the demand for MIBK in the domestic market has shown a rapid growth momentum. However, under the impact of foreign large-scale, low-cost, and high-quality MIBK products, domestic MIBK devices have been in a low operating rate for a long time, and more than half of domestic MIBK consumption is imported. Therefore, the key to reversing this pattern lies in the self-developmen...

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Problems solved by technology

[0004] Technical problem: In order to solve the defect that the palladium content of the catalyst used in the prior art is relatively high, and the DIBK in the product is not fully recovered and the economic cost is relatively large, the invention provides an acetone mixture of methyl isobutyl ketone and diisobutyl ketone Liquid phase one-step preparation process

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