Method and apparatus for the production of polyesters, copolyesters, and polycarbonates

摘要

In the case of a process for the preparation of polyesters, the esterification of dicarboxylic acids and diols in at least one reaction stage, the prepolycondensation of the esterification product in at least one reaction stage, and the polycondensation of the pre-polycondensation product ensues in at least one reaction stage. In order to increase the capacity of a formed of several reaction stages plant for the preparation of polyesters, it is provided in the case of at least one of the reaction stages the supplied product stream before or within the reaction step in at least two partial streams of the partial streams of dividing and partially or completely separately from one another by the reaction stage, to conduct.