Patent ID: 8664451
Filing Date: 2014-03-04
Classification: C07C,Y02P

Abstract:
1. A method of controlling a multiple-reaction zone, hydroformylation process for producing normal (N) and iso (I) aldehydes at a N:I ratio, the process comprising contacting an olefinically unsaturated compound with carbon monoxide, hydrogen and a catalyst comprising (A) a transition metal, (B) an organobisphosphite, and (C) an organomonophosphite ligand, the contacting conducted in first and subsequent reaction zones and at hydroformylation conditions comprising an olefinically unsaturated compound partial pressure in each zone, the method comprising changing the N:I ratio by one or more of the following: (1) Changing the temperature in the first reaction zone; (2) Feeding up to 20% of the total olefin feed into a subsequent reaction zone; (3) Reducing the amount of olefin feed into a subsequent reaction zone; (4) Changing the olefin feed rate to the first reaction zone; and (5) decreasing the olefinically unsaturated compound partial pressure in the first reaction zone to decrease the N:I ratio or increasing the olefinically unsaturated compound partial pressure in the first reaction zone to increase the N:I ratio.