Patent ID: 6984668
Filing Date: 2006-01-10
Classification: B01J,C07C

Abstract:
1. A liquid-phase carbonylation reaction medium comprising one or more reactants, including a substrate selected from the group consisting of alkenes and alkynes, a carbonylation agent and a liquid carrier, for carbonylation of the said substrate, optionally comprising a reaction product(s); a catalyst system comprising at least a metal or metal compound and optionally further compounds such as ligands or complexing agents; characterised in that the reaction medium further comprises a polymeric dispersant dissolved in said liquid carrier, the dispersant comprising acidic or basic polymers and a colloidal suspension of particles of said metal or metal compound within the liquid carrier stabilized by the said polymeric dispersant, the polymeric dispersant having sufficient acidic or basic functionality to substantially stabilize a colloidal suspension of said metal or metal compound.