| abstract |
A process for the continuous recovery of (meth)acrylic acid from the reaction gas of a catalytic gas-phase oxidation comprising the following process stages is proposed: n I quenching of the reaction gas by evaporative cooling using a high-boiling solvent, n II separation of the (meth)acrylic acid from the quenched reaction gas by absorption into the high-boiling solvent, n III separation of the solvent laden with (meth)acrylic acid by rectification into a first part-stream IIIA), which contains predominantly (meth)acrylic acid, and into a second part-stream IIIB) which contains predominantly the solvent, n IV recycling of the stream IIIB) to process stage II and n V distillative production of (meth)acrylic acid from stream IIIA), all liquid residual streams obtained in process stage V being recycled to process stage I. |