Patent ID: 7214816
Filing Date: 2007-05-08
Classification: B01D,B01J,C07C

Abstract:
1. A process for producing (meth)acrylic acid and (meth)acrylic esters comprising the steps of: (A) reacting propane, propylene, or isobutylene and/or (meth)acrolein, with molecular oxygen or a molecular oxygen-containing gas by gas-phase catalytic oxidation method to produce crude (meth)acrylic acid; (B) purifying the resultant crude (meth)acrylic acid to produce a (meth)acrylic acid product; and (C) reacting the crude (meth)acrylic acid with alcohol to produce (meth)acrylic esters, in case of stopping a plant used in any one of the steps (B) and (C) disposed in parallel with each other, a resultant surplus crude (meth)acrylic acid being temporarily stored in a tank, and after restoring the stopped plant, the crude (meth)acrylic acid stored in a tank being fed to the plant used in the step (B) and/or the plant used in the step (C), wherein a production capacity of the plant used in the step (A) is designed so as to be lower than a total consumption capacity of the plants used in the steps (B) and (C).