Catalytic cracking catalysts and process
US4687754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1984 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Oct 3, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/084
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Catalytic cracking catalysts, the process of their preparation and the process of their use. The cracking catalyst comprises a zeolite having a mole ratio of oxides in the dehydrated state of (0.85-1.1) M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2 wherein "M" is a cation having a valence of "n", "x" has a value greater than 6.0, has a x-ray powder diffraction pattern having at least the d-spacings of Table A, has extraneous silicon atoms in the crystal lattice in the form of framework SiO.sub.4 tetrahedra and has been thermally treated and/or cation exchanged with a multivalent cation. The catalyst of the instant invention are unique in the fact that the zeolitic aluminosilicate has less than 1.2 weight percent Na.sub.2 O and such is achieved without the requirement of a pre-calcination step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.