BATCH TYPE DISTILLATION APPARATUS FOR THE PURIFICATION OF LACTIDE, AND THE DISTILLATION METHOD FOR THE PURIFICATION OF LACTIDE USING THE SAME

摘要

The present invention relates to a batch-type distillation purification device for lactide and a distillation purification method for lactide using same and, more particularly, provides a batch-type distillation purification device that is used to purify a lactide monomer from a lactide-containing mixture, including a raw material supply unit that supplies a lactide-containing mixture as a raw material; a distillation tower that is supplied with the lactide-containing mixture from the raw material supply unit and has a tower bottom portion storage tank where the mixture is stored in a lower portion; a reboiler that is connected to the tower bottom portion storage tank of the distillation tower and is supplied with a liquid mixture in the tower bottom portion storage tank; and a tower upper condenser that is connected to a tower upper portion of the distillation tower and allows external reflux and recovery by condensing a gas phase supplied from the tower upper portion to maintain a flow state, in which the reboiler is a liquid film type evaporator having a conduction surface area expanded in the form of a thin film.