Process for treating tail gases of methyl ethyl ketone unit

Abstract

The invention discloses a process for treating tail gases of a methyl ethyl ketone unit. The process comprises the following steps: performing dehydration and dust extraction treatment on the tail gases of the methyl ethyl ketone unit, so that the content of micro dust in the treated tail gases is less than or equal to 0.01mg / Nm<3>, and the moisture content is less than or equal to 1PPm; enabling the treated tail gases to enter a membrane reactor under the conditions of 0.1-1.0MPa and 40-100 DEG C, wherein the gas inlet speed is 0.5-5m / s, and a membrane material filled in the membrane reactor is a hollow fiber composite organic membrane; separating osmotic gas enriched in butane and permeation residue gases enriched in alcohols, ethers and methyl ethyl ketone, enabling the osmotic gas to return to a sec-butyl alcohol section to serve as a raw material, enabling one part of the permeation residue gases to return to the membrane reactor so as to be further purified, and recovering the alcohols, ethers and methyl ethyl ketone from the other part of the permeation residue gases. The method has the advantages of high efficiency, low energy consumption and the like.

Description

technical field [0001] The invention relates to a process for treating the tail gas of a methyl ethyl ketone device. Background technique [0002] Methyl ethyl ketone is an important low-boiling point solvent, which has excellent solubility and drying properties, can form azeotropes with many solvents, and has a strong effect on many substances, such as resins, fiber derivatives, synthetic rubber, oils, and higher fatty acids. Solvent ability, good solvent for polymer compounds such as nitrocellulose, polyurethane, vinyl resin, acrylic resin, alkyd resin, phenolic resin, adhesive, ink, magnetic tape, pharmaceutical production and lubricating oil dewaxing, widely used in lubricating oil Dewaxing, coatings, adhesives, inks, tapes, medicine and electronic components and other fields. In addition, as an important organic chemical raw material and intermediate, it can produce high-molecular ketones, cyclic compounds, etc., and can also directly synthesize methyl ethyl ketone per...

AI Technical Summary

Problems solved by technology

[0009] The above methods are ubiquitous, but the process is complicated and the production cost is high. In addition, after the adsorbent reaches a certain amount of adsorption, it needs to be regenerated before it can be used. In the prior art, no membrane is used to separate and treat the tail gas of the methyl ethyl ketone plant.

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