Principle of decolorization sand refining: The reason for the darker color in clear oil is that it contains some polar substances (such as nitrogen, sulfur, oxygen, etc.), and the surface of decolorization sand has very rich nanoscale micropores that can absorb these polar substances.
For the processed clear oil, the color is still relatively large, and it can be further decolorized and refined by decolorizing sand. The decolorized sand is made of 100 mesh filtered sand sieved from natural mineral kaolin. The decolorized and refined base oil has a wider range of uses.