Experimental Evaluation of The Effect of Pour Point Depressant On Lubricating Oils

Addition of small amounts of wax inhibitors to lubricating oils can reduce the formation of wax crystals and therefore improve its pour point. In this research, the effect of different concentrations of Dodecilpolymethacrylate and Tetradodecilpolymethacrylate on pour point of lubricating oils was investigated. Results showed that the additions of wax inhibitors improve the pour point of the lubricating oil, but the relation between pour point decrease and wax inhibitor concentration is not linear. It was also found that wax inhibitor dissolved in isooctane was better than the effect of pure one. Higher molecular weight wax inhibitor (Tetradodecylpolymethacrylate) showed better efficiency as a flow improver.

Keywords:

wax inhibitor , pour point , lubricating oil , and Wax