Patent ID: 7544836
Filing Date: 2009-06-09
Classification: B01J,C07C

Abstract:
1. A production method for (meth)acrolein or (meth)acrylic acid, in which (meth)acrolein or (meth) acrylic acid is obtained by performing a catalytic gas phase oxidation reaction on propylene, propane or isobutylene by using a molecular oxygen by means of a heat-exchange type multi-tubular reactor, comprising a tube bundle portion in which a multiple of reaction tubes each filled with a catalyst are aligned in parallel to one another and a tube plate which is adjacent to a downstream side of the tube bundle portion of the reaction tubes and forms a lead-out portion for a reaction gas, in which the tube bundle portion of the reaction tubes has a hollow columnar constitution as a whole, being characterized in that a rectifier is provided on a tube plate.