Butynediol hydrogenation continuous production butylene glycol co-production system and process

Abstract

The invention relates to a system and a process for continuously producing 2-butene-1,4-diol and co-producing 1,4-butanediol through hydrogenation of 1,4-butynediol. The system comprises a decoloration reaction system, a semi-hydrogenation reaction system, a 2-butene-1,4-diol rectification system, a full-hydrogenation reaction system and a 1,4-butanediol rectification system which are connected sequentially, wherein a 1,4-butynediol raw material tank is connected with the decoloration reaction system through a 1,4-butynediol raw material delivery pump, the decoloration reaction system is connected with the semi-hydrogenation reaction system through a to-be-reacted solution metering pump, the semi-hydrogenation reaction system is connected with the 2-butene-1,4-diol rectification system through a second crude 2-butene-1,4-diol metering pump, the 2-butene-1,4-diol rectification system is connected with the full-hydrogenation reaction system through a 1,4-butanediol full-hydrogenation metering pump, and the full-hydrogenation reaction system is connected with the 1,4-butanediol rectification system through a crude 1,4-butanediol metering pump. The flow is simple, the operation is stable, the operation cost is low, the conversion rate and the selectivity are high, and the impurity separation effect is good.

Description

technical field [0001] The invention relates to a butylene glycol / butanediol production system, in particular to a system and process for continuously producing butylene glycol and co-producing butylene glycol using butynediol as a raw material. Background technique [0002] Butenediol (abbreviated as BED), also known as 2-butene-1,4-diol (2-Butene-1,4-diol), can be prepared by semi-hydrogenation of butynediol, colorless or light amber Oily liquid, mainly used for pharmaceutical intermediates (vitamin B6), herbicides (endosulfan) and intermediates of drugs with furan ring (2,5-dihydrofuran). The annual demand for butylene glycol in my country is 15,000-20,000 tons. [0003] Butanediol (abbreviated as BDO, 1,4-Butanediol), which can be obtained by full hydrogenation of butynediol, is a colorless viscous oily liquid. It is an important organic and fine chemical raw material. It is widely used in medicine, Chemicals, textiles, papermaking, automobiles and daily chemicals and ...

AI Technical Summary

Problems solved by technology

However, the 1,4-butenediol process listed above does not involve decolorization reaction system, semi-hydrogenation reaction system, butene glycol rectification system, full hydrogenation reaction system, butanediol rectification system The related content of the system is poor in scale and continuity, and cannot maximize the recycling and utilization of resources

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