Effect of heating temperature on quality of blending oil

The effect of heating temperature on quality of EAEP blending oil, compared with different blending oil (commercial oil, solvent extracted blending oil) had been studied in this paper, the oils were heated for 1h at100, 150, 200, 250, 300℃. Oil quality was evaluated by measuring physical and chemical value. The results reflected that color, acid value and p-anisidine value were increased and peroxide value revealed an initial increase followed by a decrease for three kinds of blending oils after heating, the amount of polyunsaturated fatty acids decreased, but saturated fatty acid content increased, the EAEP blending oil could also maintain a relative ideal ratio about (0.27∶1∶1) after heating at below 200℃.