Patent ID: 9550179
Date: 2017-01-24
CPC Classifications: B01J,C07B,C07C,C07F

Claim:
1. A process for preparing an aldehyde, the process comprising contacting an olefin, hydrogen, and carbon monoxide with a catalyst solution at conditions effective to form an aldehyde, the catalyst solution comprising: (a) a transition metal (M) comprising rhodium; (b) a mixture of halophosphite conformational isomers A and B: and (c) a hydroformylation solvent, wherein the lone pair of electrons on the phosphorus atom in isomer A is in a pseudo-equatorial orientation; the lone pair of electrons on the phosphorus atom in isomer B is in a pseudo-axial orientation; X is fluorine or chlorine; R is a divalent group having the formula 1: R R the molar ratio of B:A is such that the isomer B forms a complex with the transition metal; and the molar ratio of A:M is 5 or less.