Ultra high zeolite content FCC catalysts and method for making same from microspheres composed of a mixture of calcined kaolin clays
US5023220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1990 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Jun 13, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/64
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for increasing the zeolite content of high zeolite content clay derived microspheres obtained by reacting porous precursor microspheres with a sodium silicate solution in the presence of seeds to crystallize zeolite Y in situ in macropores of precursor microspheres composed of a mixture of metakaolin and kaolin calcined to undergo the exotherm. The increased zeolite content is achieved by increasing macroporosity of the precursor microspheres and increasing the content of metakaolin in the precursor microspheres. The increase in zeolite is associated with an increase in catalytic activity and unexpectedly improved selectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.