Modified Y-type molecular sieve, catalytic cracking catalyst comprising the same, its preparation and application thereof
US11517886B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 27, 2019 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Aug 15, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A modified Y-type molecular sieve has a modifying metal content of about 0.5-6.3 wt % calculated on the basis of an oxide of the modifying metal and a sodium content of no more than about 0.5 wt % calculated on the basis of sodium oxide. The modifying metal is magnesium and/or calcium. The modified Y-type molecular sieve has a proportion of non-framework aluminum content to the total aluminum content of no more than about 20%, a total pore volume of about 0.33-0.39 ml/g, a proportion of the pore volume of secondary pores having a pore size of 2-100 nm to the total pore volume of about 10-25%, a lattice constant of about 2.440-2.455 nm, a lattice collapse temperature of not lower than about 1040° C., and a ratio of B acid to L acid in the total acid content of no less than about 2.30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.