Micro-interface preparation system and method of 1, 4-butanediol

Abstract

The invention provides a micro-interface preparation system of 1, 4-butanediol, which comprises a mixing tank, the mixing tank is connected with a methanol feeding pipeline and a maleic anhydride feeding pipeline, and the mixing tank is sequentially connected with a heat exchanger, a single esterification reactor, a double esterification reactor, a hydrogenation reactor, a flash tower, a methanol rectifying tower, a dimethyl maleate rectifying tower and a 1, 4-butanediol rectifying tower. A product outlet is formed in the 1, 4-butanediol rectifying tower, a gas-liquid linkage type micro-interface generator is arranged in the hydrogenation reactor, and the gas-liquid linkage type micro-interface generator is connected with a hydrogen inlet pipeline and a circulating pump. Hydrogen is dispersed and broken into hydrogen microbubbles through the gas-liquid linkage type micro-interface generator, the gas-liquid two-phase mass transfer area is increased, and due to the fact that the gas-liquid linkage type micro-interface generator has the circulating stirring function, the hydrogen can better react with mixed liquid in the hydrogenation reaction process, and the hydrogenation reaction is more sufficient.

Description

technical field [0001] The invention belongs to the technical field of butanediol production, and in particular relates to a micro-interface preparation system of 1,4-butanediol. Background technique [0002] 1,4-butanediol is one of the methanol series product chains, and is an important basic organic chemical and fine chemical raw material. In the process of producing 1,4-butanediol, manufacturers generally do not use 1,4 - Butanediol is the final product, but focus on the extension of 1,4-butanediol derivatives, 1,4-butanediol derivatives are fine chemical products with high added value, widely used as solvents, medicines, cosmetics , plasticizers, curing agents, pesticides, herbicides, foamed artificial leather, fibers and engineering plastics, etc.; due to the wide range of uses and large amounts of 1,4-butanediol products, the 1,4-butanediol Production technology needs to be continuously improved. [0003] The production methods of 1,4-butanediol mainly include: (1) ...

AI Technical Summary

Problems solved by technology

[0008] 1. In order to promote the reaction in the hydrogenation section, manufacturers will increase the amount of catalyst, which increases the production cost

[0009] 2. Due to the increase in the amount of catalyst in the hydrogenation section, incomplete catalyst reaction often occurs, and the remaining catalyst is wasted, and after entering the follow-up system, it will affect the normal production of the follow-up system

[0010] 3. During the mixing process of hydrogen and slurry, there will still be a dead angle of stirring, and there will still be problems of uneven stirring between hydrogen, catalyst and slurry, resulting in insufficient reaction in the hydrogenation section and affecting the output of 1,4-butanediol

[0011] 4. Stirring cannot break or completely break the hydrogen bubbles, and the hydrogen cannot be mixed evenly with the slurry

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