PROCESS FOR CONTINUOUS PREPARATION OF HIGH MOLECULAR WEIGHT POLYESTERS BY ESTERIFICATION OF DICARBOXYLIC ACIDS AND/OR TRANSESTERIFICATION OF DICARBOXYLIC ACIDS WITH DIOLS AND/OR MIXTURES THEREOF AND AN APPARATUS THEREFOR

摘要

The present invention relates to a method for the continuous production of high-molecular polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acid esters with diols and/or mixtures thereof in the presence of catalysts with formation of a prepolymer in a tower reactor and polycondensation thereof to form a high-molecular polyester in a polycondensation reactor, a prepolymer with 40 to 70 repeat units (DP) being produced in the tower reactor and this prepolymer being polycondensed in only one further reactor to form a polyester with 150 to 205 DP.