37results about How to "Good shape selectivity" patented technology

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

This invention discloses a USY molecular sieve, its preparation method, and its applications. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 35.0%–55.0% of the total pore volume of the molecular sieve, and the most probable pore size is 23–30 nm. When used as a hydrocracking catalyst, this USY molecular sieve exhibits better adsorption, diffusion, and shape selectivity, resulting in superior reaction performance.