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 produced, the cost is correspondingly reduced. Silica gel decolorizing sand can not only treat diesel 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 refined diesel products, as well as oils that cannot be treated using traditional methods. Its applicability is quite extensive.

3. It solves the problem of waste disposal. The residue produced by silica gel decolorizing sand does not bond, agglomerate, or solidify, allowing it to be reused as waste. If sold, it also fetches a higher price compared to residues treated with traditional methods, addressing environmental concerns.