USY molecular sieve is widely used in the petroleum refining industry, particularly in fluid catalytic cracking (FCC) processes. It enhances the conversion of heavy petroleum fractions into lighter, more valuable products like gasoline and diesel. Its high stability and acidity make it effective in cracking large hydrocarbon molecules. Additionally, it is employed in hydrocracking and hydrotreating processes to improve fuel quality by removing impurities. Beyond petroleum refining, it is utilized in chemical synthesis as a catalyst for various organic reactions, including alkylation and isomerization. Its porous structure also makes it suitable for gas separation and purification applications, such as removing moisture or other contaminants from air or industrial gases.