| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for separating a solid metal catalyst element for the purpose of reusing the element. SOLUTION: In a process for preparing an aromatic polycarbonate by reacting an aromatic hydroxy compound with carbon monoxide and oxygen in one or, optionally, more solvents in the presence of a catalyst system to form a liquid phase, at least a part of the liquid phase is subjected to treatment to form a treated liquid phase. The treatment comprises (a) heating the liquid phase at a temperature not more than an average temperature of the reaction, without passing oxygen through the liquid phase, (b) adding one or more protic compounds to the liquid phase, and (c) passing one or more inert or reducing gases through the liquid phase. COPYRIGHT: (C)2005,JPO&NCIPI
|
