Patent ID: 7351868
Filing Date: 2008-04-01
Classification: C07C,C07F

Abstract:
1. A method of minimizing the production of one or more phosphonium ion ligand degradation products in a reaction process wherein a polyunsaturated olefin is reacted in the presence of a transition metal-triorganophosphine ligand complex catalyst to form as a product, by-product, or intermediate product a conjugated functionalized olefin comprising an α,β-unsaturated aldehyde, the minimization method comprising conducting the reaction process with a triorganophosphine ligand having a ligand cone angle greater than 135° or a pKa of less than 8.3, under process conditions sufficient to minimize the formation of phosphonium ion ligand degradation product(s) such that the rate of ligand usage is less than about 2 grams ligand per liter reaction fluid per day.