METHOD AND APPARATUS FOR COLLECTING (METH)ACROLEIN OR (METH)ACRYLIC ACID

摘要

A reaction gas (1) containing (meth)acrolein or (meth)acrylic acid and obtained through vapor-phase catalytic oxidation is brought into contact with an aqueous solution as a collecting solvent in a collection column main body (2) to collect the (meth)acrolein or (meth)acrylic acid with the aqueous solution. The reaction gas (1) is supplied to the collection column main body (2) from two opposed nozzles (2c) to cause the gas flows to collide with each other in the collection column main body (2). Thus, (meth)acrolein or (meth)acrylic acid can be efficiently collected from a gas containing the (meth)acrolein or (meth)acrylic acid while preventing polymerization.