METHOD FOR REMOVING ALKALI FROM ALKALI-CONTAINING WASTE OIL AND INSTALLATION THEREFOR

摘要

PROBLEM TO BE SOLVED: To perfectly and efficiently remove (dealkalize) an alkali from an alkali-containing waste oil P.;SOLUTION: This method for removing the alkali from the alkali-containing waste oil is characterized by bringing the alkali-containing waste oil P obtained by carrying out at least one of a saponification reaction and an addition reaction into contact with an acidic aqueous solution having an acid concentration of 5 to 50 mass% and maintaining the contact for a prescribed time.;COPYRIGHT: (C)2005,JPO&NCIPI