Hydrocracking process utilizing a catalyst having a reduced zeolite content
US4857169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Nov 10, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G65/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A catalyst composition composed of a porous, inorganic refractory oxide in intimate combination with between about 40 weight percent and about 70 weight percent of a crystalline aluminosilicate Y zeolite. The Y zeolite contains ion-exchanged Group VIII noble metal cations and preferably has a silica-to-alumina mole ratio above about 6.0. Such a catalyst containing the recited amount of zeolite has been found to possess higher than expected activity when used to hydrocrack feedstocks in an ammonia-deficient atmosphere and to retain activity for hydrocracking in ammonia-deficient atmospheres after regeneration. The most preferred Y zeolite for use in the catalyst has a silica-to-alumina mole ratio between about 6.1 and about 7.0 and is prepared by contacting an ammonium-exchanged Y zeolite with an aqueous solution of ammonium hexafluorosilicate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.