Process using a catalyst to dehydrogenate an alkyl aromatic compound
US5510552A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Sep 21, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C5/3332
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process using a particular catalyst in the dehydrogenation of an alkyl aromatic compound, e.g., ethylbenzene, to form a vinyl aromatic compound, e.g., styrene. The catalyst comprises a calcination product of (a) at least one iron oxide; (b) at least one carbonate, bicarbonate, oxide or hydroxide of potassium and/or cesium; (c) an oxide, carbonate, nitrate or hydroxide of cerium, or a mixture of at least two thereof; (d) an hydraulic cement; (e) an hydroxide, carbonate, bicarbonate, acetate, oxalate, nitrate, or sulfate of sodium, in an amount sufficient to provide from 0.2 to 10 percent sodium, calculated as sodium oxide, by weight of the calcined catalyst; and (f) a carbonate, sulfate, or hydroxide, of calcium or a mixture of at least two thereof, in an amount sufficient to provide from 1.5 to 20 percent calcium, calculated as calcium oxide, by weight of the calcined catalyst. The catalyst has improved moisture stability compared to catalysts in which at least one of (e) or (f) is not met.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.