Processes for regenerating dispersions of ligand-stabilized, palladium(II) halide complexes used in carbonylation catalysts

摘要

This invention concerns processes for regeneration of carbonylation catalysts consisting of dispersions of ligand-stabilized palladium(II) halide complexes in quaternary ammonium, phosphonium and arsonium salts of trihalostannate(II) and trihalogermanate(II) using hydrogen peroxide as the regenerating agent.