Cracking catalyst for hydrocarbon charges comprising an offretite, a zeolite and a matrix
US4992400A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1988 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Feb 10, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The cracking catalyst of the invention contains: PA0 (a) 20-95% by weight of at least one matrix, selected from the group consisting of alumina, silica, magnesia, clay, titanium oxide, zirconia, combinations of at least two of these compounds and alumina-boron oxide combinations, PA0 (b) 1-60% by weight of at least one zeolite of open structure whose main dodecagonal channels have openings of at least 7 Angstroms, said zeolite of open structure being selected from the group formed of X, Y, L, omega and beta zeolites, PA0 (c) 0.5-60% by weight of at least one offretite whose main dodecagonal channels have openings smaller than 7 Angstroms and which have a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio from about 15 to about 500, the crystalline parameters a and c of elementary mesh ranging respectively from 1.285 to 1.315 nm for a and from 0.748 to 0.757 nm for c and have a potassium content lower than 1.5% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.