Patent ID: 7786323

Claim:
A collecting device for collecting (meth)acrolein or (meth)acrylic acid from a gaseous oxidation mixture by contacting a reaction gas with a solvent, comprising: a contact portion where the reaction gas is brought into contact with the solvent, a plurality of reaction gas supply devices for supplying the reaction gas to the contact portion, and a solvent supply device for supplying the solvent to the contact portion, wherein the plurality of reaction gas supply devices are provided in directions so as to cause a direct collision of the reaction gas supplied from the respective reaction gas supply devices at one place in the contact portion, the (meth)acrolein or (meth)acrylic acid is contained in the reaction gas, and the reaction gas is obtained through a vapor-phase catalytic oxidation reaction of at least one selected from the group consisting of propane, propylene and isobutylene or (meth)acrolein, and molecular oxygen or a molecular oxygen-containing gas.