Amorphous silica-alumina, a carrier combination and a hydrocracking catalyst containing the same, and processes for the preparation thereof
US6723297B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/647
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An acidic amorphous silica-alumina having large specific surface area and a large pore volume, a carrier complex and a hydrotreating catalyst containing said acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing said acidic amorphous silica-alumina in combination with a modified zeolite-Y for treating petroleum hydrocarbon materials to produce middle distillates, and processes for the preparation thereof. Said amorphous silica-alumina has a SiO2 content of 10-50 wt %, a specific surface area of 300-600 m2/g, a pore volume of 0.8-1.5 ml/g and an IR acidity of 0.25-0.60 mmol/g. The catalyst according to the present invention shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates in a higher yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.