Production technology for co-producing methyl isobutyl ketone and diisobutyl ketone

Abstract

The invention relates to the field of production technologies of methyl isobutyl ketone, and discloses a production technology for co-producing the methyl isobutyl ketone and diisobutyl ketone. The production technology comprises the following steps: performing a reaction on acetone and hydrogen gas in a reactor under the action of a catalyst, enabling a liquid phase produced in the reactor, as amixed material flow, to enter a light component-removing tower to remove a light component from the mixed material flow, sending a liquid phase produced at the bottom of the light component-removing tower to an acetone separating tower, removing the acetone from the mixed material flow in the acetone separating tower, separating a liquid phase produced at the bottom of the acetone separating towerby using a three-phase phase separator, sending an obtained oil phase to an azeotropic alcohol-removing tower for azeotropic rectification, and taking a liquid phase produced at the bottom of the azeotropic alcohol-removing tower as a product material flow; separating the product material flow by using a liquid-liquid phase separator, sending an obtained oil phase to an MIBK purifying tower; producing a product MIBK at the top of the MIBK purifying tower, and sending a liquid phase produced at the tower bottom to a DIBK purifying tower; circulating a material flow produced at the top of the DIBK purifying tower to the MIBK purifying tower; and producing a product DIBK at the side line of the DIBK purifying tower. By adopting the production technology, the energy consumption of the MIBK purifying tower is lowered.

Description

technical field [0001] The invention relates to the field of production technology of methyl isobutyl ketone, in particular to a production technology of co-production of diisobutyl ketone from methyl isobutyl ketone. Background technique [0002] Methyl isobutyl ketone (MIBK) and diisobutyl ketone (DIBK) are both important and excellent medium-boiling point advanced organic solvents and chemical intermediates, widely used in coatings, inks, epoxy resins, adhesives , nitrocellulose, ethyl fiber and other fiber-based coatings and resin-based coatings and other industries. [0003] Existing typical representative processes are acetone three-step method and acetone one-step method. The acetone one-step method is as attached Figure 8 As shown, acetone and hydrogen are transported into the reactor and reacted under the action of the catalyst, and the liquid phase produced by the reactor is a mixture flow; the mixture flow enters the light component removal tower to remove the l...

AI Technical Summary

Problems solved by technology

However, when isopropanol and water form an azeotropic system, the target product MIBK and water can also form an azeotropic system, so considering the product yield to avoid a large amount of damage to the target product MIBK and the difficulty of detaching water during actual operation, from azeotropic Part of the water is still entrained in the liquid phase produced at the bottom of the dealcoholization tower. After entering the MIBK purification tower, this part of water is vaporized in the MIBK purification tower and extracted from the top condenser, which increases the energy consumption of the MIBK purification tower.

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