RÜCKGEWINNUNG VON METALLKATALYSATOREN FÜR DIE HERSTELLUNG VON DIARYLCARBONATEN

摘要

A method for efficient reclamation of metal catalyst species from aqueous extract streams diaryl cabonate synthesis, comprising treating a metal-containing aqueous extract stream of a mixture from the production of diaryl carbonates with a precipitating agent effective to selective precipitate one or more metal catalyst species from the extract. Use of these methods substantially reduces both financial and environmental concerns for the preparation of diaryl carbonates.