US 7,544,836 B2
	Process for producing (meth)acrolein or (meth)acrylic acid
Kimikatsu Jinno, Mie (Japan); Yasushi Ogawa, Mie (Japan); Yoshiro Suzuki, Mie (Japan); and Shuhei Yada, Mie (Japan)
Assigned to Mitsubishi Chemical Corporation, Tokyo (Japan)
Appl. No. 11/596,287 PCT Filed Oct. 25, 2004, PCT No. PCT/JP2004/016171 § 371(c)(1), (2), (4) Date Mar. 23, 2007, PCT Pub. No. WO2005/110956, PCT Pub. Date Nov. 24, 2005.
Claims priority of application No. 2004-143305 (JP), filed on May 13, 2004.
Prior Publication US 2008/0045748 A1, Feb. 21, 2008
Int. Cl. C07C 51/16 (2006.01); C07C 51/235 (2006.01)

U.S. Cl. 562—545  [562/532]

4 Claims

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.