Process for the production of diaryl carbonates

摘要

In a new process for the production of aromatic carbonates from aromatic hydroxy compound, CO and O2 in contact with a platinum-group metal catalyst, a co-catalyst, a quaternary salt and a base at elevated temperature and elevated pressure, an improvement is achieved if the reaction water is removed continuously from a partial flow of the reaction under reduced pressure and largely isothermal conditions and the dehydrated partial flow is again supplied to the reaction.