Device and process for preparing methanol and butyl acetate

Abstract

The invention relates to a device and a process for preparing methanol and butyl acetate. The device comprises a reaction distillation column and a first pervaporation membrane separation system, wherein the n-butyl alcohol inlet of the reaction distillation column is formed above a methyl acetate inlet; a reboiler is connected with the bottom of the reaction distillation column; a total condenseris connected with a recovery hole in the top of the reaction distillation column; the outlet of the total condenser is connected with the reaction distillation column and the first pervaporation membrane separation system respectively; the penetrating fluid outlet of the first pervaporation membrane separation system is connected with a methanol outlet; and a penetration residual liquid outlet isconnected with the methyl acetate inlet. By adopting the device and the process, a reaction distillation-pervaporation integration process is adopted to prepare methanol and butyl acetate with high purity, the reflux ratio is greatly reduced, the volume of the reaction distillation column can be reduced, the reactant, namely the methyl acetate, is easy to obtain, large-size refining equipment canbe avoided, the technical route is simple, the energy consumption is low, environment pollution is avoided, equipment investment and production cost can be remarkably reduced, and requirements of energy conservation and emission reduction can be met.

Description

technical field [0001] The invention relates to methanol and butyl acetate preparation technology, in particular to a reactive distillation-pervaporation integrated methanol and butyl acetate preparation device and process. Background technique [0002] N-butyl acetate, also known as butyl acetate, is a colorless, transparent, fruity, flammable, volatile, and insoluble liquid. It has excellent solubility and can be miscible with organic solvents such as alcohols, ethers, and ketones. It is an important organic solvent, extraction agent, and dehydrating agent. It can also be used as a component of fragrance compounding agent and fragrance agent, and has wide industrial uses. In recent years, with the increasingly stringent environmental protection regulations worldwide and the continuous enhancement of people's environmental awareness, people tend to use n-butyl acetate as a good substitute for toxic and harmful solvents such as toluene and xylene, so its market prospect is b...

AI Technical Summary

Problems solved by technology

In addition, although the industrial application value of the reactant methyl acetate is not high, as a by-product of PVA production, it generally exists in the form of a mixture with methanol, and extraction and distillation methods are required to separate and purify methyl acetate, so the energy consumption of the whole set of technology is relatively high , the equipment is more complex

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