Process for removing metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether

Abstract From the Canadian patent

In a process for removing the metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether and containing carbonyl complexes of rare metals from group VIII of the Periodic Table of the elements quaternary organo-phosphorus compounds as organic promoters, metallic corrosion products and acetic acid acetic, anhydride, ethylidene diacetate and in some cases, undistillable organic compounds the catalyst solution is, treated with water the rare metal carbonyl complex and, the undistillable organic compounds if present, being, precipitated, while the organic promoter and the metallic corrosion products remain …