Silica gel decolorizing sand refers to a type of decolorizing sand processed from coarse-pore silica gel, which is also a commonly used decolorizing sand in the market. 1. Silica gel decolorizing sand utilizes the principle that silica gel itself contains a large number of nanoscale molecular structures in its composition to adsorb pigments and impurities from waste engine oil or waste diesel.

2. Low cost and wide applicability. Due to less residue output, the cost is correspondingly reduced. Silica gel decolorizing sand can not only treat diesel oil refined from crude oil by small refineries but also process lubricating oil, reduced first-line oil, reduced second-line oil, waste engine oil, and other diesel oils refined from materials that cannot be treated by traditional methods. Its applicability is quite extensive.

3. It solves the problem of waste disposal. The residue washed out with silica gel decolorizing sand does not stick, clump, or solidify, making it reusable. If sold, it also fetches a higher price compared to residues washed out using traditional methods, thereby addressing environmental concerns.