A kind of production technology of methyl isobutyl ketone co-producing diisobutyl ketone

Abstract

The invention relates to the field of production technology of methyl isobutyl ketone, and discloses a production process of methyl isobutyl ketone co-producing diisobutyl ketone, comprising the following steps: reacting acetone and hydrogen under the action of a catalyst in a reactor; The liquid phase drawn from the reactor is a mixture stream, the mixture stream enters the light components removal tower to remove the light components in the mixture stream, and the liquid phase extracted from the bottom of the light component removal tower is sent to the acetone separation tower, and the acetone separation tower The acetone in the mixture stream is removed internally, the liquid phase drawn from the bottom of the acetone separation tower is separated by a three-phase phase separator, the obtained oil phase is sent to the azeotropic dealcoholization tower for azeotropic rectification, and the bottom of the azeotropic dealcoholization tower is collected The liquid phase is the product stream; the product stream is separated by the liquid-liquid phase separator, and the obtained oil phase is sent to the MIBK purification tower; the MIBK purification tower produces the product MIBK at the top of the tower, and the liquid phase at the bottom of the tower is sent to the DIBK purification tower; the DIBK purification tower The stream produced at the top of the tower is recycled to the MIBK purification tower; the DIBK purification tower produces DIBK in the side line, which reduces the energy consumption of the MIBK purification tower.

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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