PROCESS FOR IN SITU SYNTHESIS OF DISPERSION ZnO NANOPARTICLES IN OIL

A process for in situ synthesis of dispersion of Zno nanoparticles in an oil additive composition, wherein the process comprises the steps of dissolving a zinc salt in an alcoholic solvent and heating to 60-120° C. for 6-48 h hours to obtain a suspension;

• a) centrifuging the suspension as obtained in step (a) and washing with deionized water to obtain a precipitate of layered base zinc (LBZ);
• b) dispersing the layered base zinc precipitate as obtained step (b) in an alcohol and adding to base oil containing a dispersant;
• c) refluxing the mixture to obtain a colloidal suspension;
• evacuating the colloidal suspension at room temperature and heating at 60-90° C., followed by heating to 90-140° C. for 45 to 120 minutes to obtain a dispersion of ZnO in the oil medium.