Process for continuous recovering (meth) acrylic acid and apparatus for the process

摘要

The present invention relates to a method and apparatus for continuous recovery of (meth)acrylic acid, and more specifically to a method of continuous recovery of (meth)acrylic acid, including: conducting gas phase oxidation of at least one compound selected from the group consisting of propane, propylene, butane, i-butylene, t-butylene, and (meth)acrolein in the presence of a catalyst to obtain a mixed gas containing (meth)acrylic acid; quenching the (meth)acrylic acid-containing mixed gas to remove high boiling point by-products in the (meth)acrylic acid-containing mixed gas; contacting the high boiling point by-product-free (meth)acrylic acid-containing mixed gas with water or an aqueous solution to obtain an aqueous solution containing (meth)acrylic acid; and purifying the aqueous solution containing (meth)acrylic acid to obtain (meth)acrylic acid.;The continuous recovery method of (meth)acrylic acid according to the present invention may significantly reduce energy consumption and continuously recover high purity (meth)acrylic acid with excellent production efficiency compared to the previous recovery methods.

主权项

1. An apparatus for continuous recovery of (meth)acrylic acid, comprising:
a gas phase oxidation reactor for conducting gas phase oxidation of at least one compound selected from the group consisting of propane, propylene, butane, i-butylene, t-butylene, and (meth)acrolein in the presence of a catalyst to prepare a mixed gas containing (meth)acrylic acid; a quench tower for quenching the (meth)acrylic acid-containing mixed gas supplied from the gas phase oxidation reactor to remove high boiling point by-products in the (meth)acrylic acid-containing mixed gas; a (meth)acrylic acid absorption tower for contacting the high boiling point by-product-free (meth)acrylic acid-containing mixed gas with water or an aqueous solution to obtain an aqueous solution containing (meth)acrylic acid; and a distillation tower for purifying the (meth)acrylic-containing aqueous solution supplied from the (meth)acrylic acid absorption tower to obtain (meth)acrylic acid.