RECOVERY OF GLYCOL FROM WASTE GLYCOL-CONTAINING INDUSTRIAL LIQUID AND ANTIFREEZE CONTAINING RECOVERED GLYCOL

摘要

Recovery of glycols from used glycol-contg. technical fluids comprises (a) adding an organic solvent to the glycol-contg. fluids to form an azeotropic mixt. with the glycols which has a lower b.pt. than the glycol itself; and (b) distilling off the azeotropic mixt.