Alkylation process using dual metal ultrastable Y zeolite
US5145817A · kind A · utility
9Cited by
15References
9Claims
0Family size
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Key dates
| Filing date | May 24, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | May 24, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the alkylation/transalkylation of benzene is improved by the use of a catalyst prepared by exchanging a sodium Y zeolite with an ammonium salt to replace from about 40 percent to about 90 percent of the sodium ions with ammonium ions; calcining the resulting ammonium-sodium zeolite in steam under conditions sufficient to reduce the unit cell size to about 24.48 to 24.60 angstroms; contacting the calcined catalyst with a rare earth salt and an aluminum salt either simultaneously or sequentially; and calcining the catalyst a second time in the absence of steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.