APPARATUS AND METHOD FOR REGENERATING WASTE ISOPROPYL ALCOHOL TO MAKE ANHYDROUS IPA WITH ULTRAHIGH PURITY

摘要

PURPOSE: Provided are an apparatus and a method for regenerating waste isopropyl alcohol(IPA), derived from processes for making thin film transistor LCDs, manufacturing semiconductors and alkoxides, sol-gel processes and pharmaceutical or organic synthetic processes, to obtain anhydrous IPA with ultrahigh purity. CONSTITUTION: The apparatus comprises: an azeotropic distillation tower(71) for removing water and substances with high boiling point from waste IPA to provide pure IPA; an adsorption tower(74) connected to the distal end of the azeotropic distillation tower(71), which adsorbs and removes water from the pure IPA to provide anhydrous IPA; a second azeotropic distillation tower(76) connected to the distal end of the adsorption tower(74), which removes substances with low boiling point from the anhydrous IPA; and a filter unit connected to the distal end of the second azeotropic distillation tower(76), which removes ionic and particulate materials contained in the anhydrous IPA from which low-boiling point substances have already been removed.