Process for the continuous preparation of diaryl carbonates

Details Process for the continuous preparation of diaryl carbonates Process for the continuous preparation of diaryl carbonates

C - Chemistry, Metallurgy

07

C

C07C 69/96 (2006.01) C07C 68/00 (2006.01)

Patent

CA 2141391

The invention relates to a process for the continuous preparation of diaryl carbonates by reaction of an aromatic hydroxyl compound with carbon monoxide and oxygen in the presence of a catalyst containing a noble metal of group VIIIb of the Periodic Table of the Elements, a quaternary salt, a cocatalyst and a base. The catalyst is activated by treatment with carbon monoxide in the liquid phase. The reaction water is removed by excess reaction gas.

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