Separating device for methyl acetate hydrolysis product and method

Abstract

The invention discloses a separating device and method of hydrolytic product of methyl acetate, which comprises the following parts: acetate separating tower 1, methyl acetate extracting tower 2 and carbinol separating tower 3, wherein the hydrolytic product A of methyl acetate is induced into middle part of acetate separating tower through line with acetate liquid B on the bottom of tower; the tower top material is leaded into middle part of through line; the cool water C enters into extracting tower of methyl acetate from the top; the enriched liquid D of methyl acetate returns to circulated reacting device through line; the tower bottom material enters into middle part of carbinol separating tower through line, which produces carbinol liquid E, steam G and water F; three tower tops all possess condensers with temperature at 5-15 deg.c; the feed quality rate of cool water and hydrolytic product of methyl acetate is controlled between 0.1 and 0.25.

Description

technical field [0001] The invention relates to a method and a device for separating a hydrolyzed product of methyl acetate, in particular to a rectification separation process and a device using a novel high-efficiency structured packing and a distributor. Background technique [0002] In the production of vinylon (PVA), the mixture after hydrolysis reaction of methyl acetate contains methyl acetate, acetic acid, methanol, water, wherein the recovery of methyl acetate and methanol involves acetic acid separation tower, methyl acetate extraction tower, methanol The separation column, especially the formation of azeotrope between methyl acetate and methanol requires extractive distillation, so this separation and recovery process consumes a lot of energy. [0003] At present, most domestic methyl acetate recovery processes use plate towers, which mainly have problems such as low recovery rate of methyl acetate, low product quality, high energy consumption and water consumptio...

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Problems solved by technology

[0003] At present, most domestic methyl acetate recovery processes use plate towers, which mainly have problems such as low recovery rate of methyl acetate, low product quality, high energy consumption and water consumption, low production capacity and complicated separation process.

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