Mixed butyraldehyde separation device and application of packed towers

Abstract

The invention provides a mixed butyraldehyde separation device and the application of packed towers. The packed towers are used as a stabilization tower and an n-butanal tower; a tower tray and packing mixed way is adopted by an isomer tower, the five layers of tower trays are arranged on the top of the isomer tower, and the packing way is adopted at the other parts of the isomer tower; the packing is metal plate corrugated regular packing with the specific surface area of 250-500m<2> / m<3>; the tower trays are float valve tower trays, and each float valve has a form of F1 circular float valve or trapezoid guide float valve; and grid plate type packing pressing rings and grid plate type packing supports are used for limiting and supporting the packing in all packing sections. According to the invention, the energy consumption is greatly reduced, the tower height is effectively reduced and the metal material consumption is saved; and the packing is the metal plate corrugated regular packing, thus having the characteristics of high flux, low pressure reduction and high separation efficiency.

Description

technical field [0001] The invention relates to a method and device for separating mixed butyraldehyde, in particular to a rectification separation process and device using structured packing, distributors and trays. Background technique [0002] In the production of butanol and octanol, propylene and synthesis gas are used as raw materials, and the reaction mixture of crude butyraldehyde produced by low-pressure carbonylation contains isobutyraldehyde, n-butyraldehyde, water, n-butanol and a very small amount of propylene, propane, carbon dioxide, For hydrogen and methane, the refining of isobutyraldehyde and n-butyraldehyde involves a stabilization tower, butyraldehyde isomer tower, and n-butyraldehyde tower, especially the difference in boiling point between isobutyraldehyde and n-butyraldehyde is very small, so the separation and recovery process requires The number of theoretical boards is very high, and the energy consumption is also high. [0003] At present, the vas...

AI Technical Summary

Problems solved by technology

These technologies have not yet been applied to the mixed butyraldehyde recovery process. After research and experiments, we believe that if the packed tower technology is applied to the mixed butyraldehyde separation, the original process can be greatly improved, mainly in terms of energy saving and separation. High efficiency, low tower pressure, large operating flexibility, etc.

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