Enhancement Adsorption of Heavy Metal from Recovered Base Oil using Zeolite and kaolinite by Phase Transfer Catalyst and anionic surfactants-Part 2

Recovery of used lubricating oil by extraction produced organic sludge and recovered base oil. This oil has metallic content such as magnesium, nickel, vanadium, iron, and zinc. In this study, the recovered base oil was treatment by using adsorption process to remove heavy metals Zeolite and kaolinite were used as an adsorbent with and without additives. The parameters investigated include contact time, amount of zeolite, and amount of the additive. The results showed that there is a synergism between zeolite and anionic additive, further more ash removal was higher than that in the prescience of the cationic additive. The optimum removal obtained were 98% and 92 % with anionic and the cationic additive respectively, while in case of kaolinite 87% and 82% respectively. is The most influential parameter affecting ash removal was the concentration of additives and time of adsorption. The results were discussed according to adsorption isotherm of heavy metals on phase transfer catalyst or the anionic additive in pore diameter of zeolite. The results showed that, viscosity increased from 30 cst for used lube oil to 68 cst while the density decreased from 912 to 900 kg/m3 and the pour point from -2 to â?'8.5 °C. The purification oil can be used again after distilled to light naphtha and middle distillate.