CONTINOUS DOSAGE PRODUCTION METHOD FOR CATALYSTS USED IN POLYESTERS SYNTESIS AND INSTALLATION THEREFORE

摘要

Metal-based catalyst solns. are added continuously and quantitatively to glycolate dissolved in methyl-ethyl-ketone. 20-90 kop catalysts are added to a charge of 1000 kop MEG. Glycolate is prepd. in 3 hrs. at 140 +/- 5 deg.C and 80 +/- 5 torr. Solns. of glycolate are prefiltered, agitated and placed under a nitrogen blanket at 100 +/- 5 deg.C to be supplied quantitatively for PET prepn.. Prodn. units comprise reactor, distn. column condenser, an elements contg. filter, storage vessel and calibrated glycolate dosing container or a dosimeter.