Method and device for synthetizing 4-hydroxy-2-butanone through catalytic reaction rectification

Abstract

The invention belongs to the field of compound preparation, and concretely discloses a method and device for synthetizing 4-hydroxy-2-butanone through catalytic reaction rectification. The method forsynthetizing 4-hydroxy-2-butanone through catalytic reaction rectification is performed in the device for synthetizing 4-hydroxy-2-butanone through catalytic reaction rectification. The device comprises a catalytic reaction rectification tower (1), wherein the catalytic reaction rectification tower (1) comprises a rectification section (11), a catalysis section (12) and a stripping section (13) from top to bottom; formaldehyde and acetone are subjected to catalytic reaction in the catalysis section (12) to generate the 4-hydroxy-2-butanone; light ingredients in catalytic reaction products ascend to the rectification section (11) for separation and purification so as to obtain unreacted acetone; heavy ingredients in the catalytic reaction products sink to the stripping section (13) for separation and rectification so as to obtain the 4-hydroxy-2-butanone. When the method and device provided by the invention are used for synthetizing the 4-hydroxy-2-butanone, the reaction yield can be improved; the acetone loss is reduced; the reaction heat of catalytic reaction can be fully utilized; the subsequent separation energy consumption is low; the technological process is simplified; the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of compound preparation, and in particular relates to a method and a device for synthesizing butanone alcohol by catalytic reaction rectification. Background technique [0002] Butanone alcohol, chemical name 4-hydroxy-2-butanone, has both hydroxyl and carbonyl groups in its molecule. It is an important intermediate for the synthesis of vitamin A. Its structural formula is as follows: [0003] [0004] Butanone alcohol can be obtained by the reaction of formaldehyde and acetone, wherein, because the two raw materials of formaldehyde and acetone are easy to get, the cost of synthesizing butanone alcohol is relatively low, so this method has become the main method for preparing butanone alcohol. The specific reaction equation is as follows: [0005] [0006] CN1120831C discloses the method of using basic anion exchange resin to catalyze the synthesis of butanone alcohol. In the method, butanone alcohol is synthe...

AI Technical Summary

Problems solved by technology

The method adopts first pretreatment followed by catalytic reaction and final rectification separation to synthesize butanone alcohol. This method can realize continuous production, but its process flow is long and the equipment is complicated

At the same time, this method improves the conversion rate of formaldehyde by increasing the molar ratio of acetone to formaldehyde, but excessive acetone will condense to form more diacetone alcohol by-products, and in addition, excessive acetone needs to be recovered and used mechanically, which will lead to separation and purification of subsequent fractionation towers High energy consumption, large loss of acetone, high production cost

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