Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Method for producing aldehydes
 A method for producing aldehydes, which comprises reacting an olefinic unsaturated compound with carbon monoxide and hydrogen in a liquid phase in the presence of a Group 8 metal-phosphite complex catalyst, wherein a reaction product solution containing the complex catalyst and a high boiling by-product, obtained by the reaction, is intimately contacted with an extraction solution containing a polar solvent, to have either the complex catalyst or the high boiling by-product extracted selectively, followed by phase separation to separate a layer of the extraction solution from a layer of the reaction product solution. 
Mitsubishi Chemical Corporation
C C
C07C C07C
inventional inventional
Tomohiko Masaki Tomoyuki
Inoue Takai Mori