摘要 |
An integrated process for the preparation of a polyester resin, comprising the steps of (a) reacting a suitable oxidant with propene in the presence of an epoxidation catalyst to form propylene oxide, (b) separating a propylene oxide fraction, and (c) reacting the obtained propylene oxide fraction with one or more compounds selected from the group consisting of dicarboxylic acids, dicarboxylic acid anhydrides and polyhydric alcohols to obtain a polyester resin. |