REMOVAL OF TRANSITION-METALS FROM MOTOR OIL USING ION-EXCHANGE RESINS

A variety of polystyrene-divinylbenzene resins functionalized with suc h groups as SO3H, N(CH2COOH)2, and SH were tested in the slurry batch mode for the removal of transition metals from used motor oil. Natural ly occurring materials such as coal and clay were also tested. The N(C H2COOH)2 resin (Chelex 100) and the SH resin (Duolite GT-73) were foun d effective removing on the average 70 and 78% of metals such as Fe, P b, Zn, Cu, Ni, and Mn, respectively. About 700 mLs of hot oil when pum ped through a 37 x 0.9 cm column packed with the Duolite resin could b e demetalized to the extent of about 80% if the column was first washe d with hexane.