Hydrocarbon conversion process employing a modified form of zeolite Y
US5207892A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1990 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Dec 24, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel catalyst compositions comprising a metal hydrogenation component and a modified form of zeolite Y are found to be highly effective in the hydrocarbon conversion processes carried out in the presence of added hydrogen and involving hydrogenation as an essential reaction mechanism. The modified form of zeolite Y is prepared from a starting zeolite Y which has been ammonium cation exchanged to lower the alkali metal content to less than 3.0 weight percent. The starting composition is then steamed at temperatures above about 550.degree. C. to reduce the unit cell dimension and then contacted with an aqueous ammonium ion solution having a pH below about 4 to increase the bulk Si/Al.sub.2 ratio to the range of about 6.5 to 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.