SEMI-CONTINUOUS PROCESS FOR PREPARING POLYESTER HAVING RESIDENCE TIME AT ESTERIFICATION

摘要

In the semi-continuous polyester production method of the present invention, in the semi-continuous polyester production method using the esterification reaction in a continuous manner and the polycondensation reaction in a batch type, the residence time of the esterification reactor-1 (1) is 4.0 to It relates to the semi-continuous polyester manufacturing method which is 4.7 hours, and the residence time of esterification reactor-2 (2) is 1.2 to 1.4 hours.