Patent ID: 7074368
Filing Date: 2006-07-11
Classification: B01D,B01J,Y02P

Abstract:
1. A batch-type polyester polymerization apparatus including a polycondensation reactor communicating with a vacuum pipe used to vacuumize the reactor, a reactant recycling pump, and a reactant recycling pipe, further comprising: a thin film tower communicating with a portion of an upper part of the polycondensation reactor at an outlet thereof and with an end of the reactant recycling pipe at an inlet thereof, said thin film tower including a plurality of inclined plates attached to an inner wall of the thin film tower in such a way that each inclined plate meets the inner wall at a predetermined angle, wherein the thin film tower has a height and a diameter satisfying the following Equations 1 and 2: (wherein, Q is a weight of a reactant solution in the polycondensation reactor (kg), and L is the height of the thin film tower (m)) (wherein, Q is the weight of the reactant solution in the polycondensation reactor (kg), and D is the diameter of the thin film tower (m)).