Catalytic system and process for dehydrogenating ethylbenzene to styrene
US6242660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Aug 12, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2523/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Catalytic system for dehydrogenating ethylbenzene to styrene, containing chromium oxide, tin oxide, at least one oxide of an alkaline metal (M) and an alumina carrier, in delta or theta phase or in a mixture of delta+theta or theta+alpha or delta+theta+alpha phases, modified with silica, and characterized in that: PA1 the chromium, expressed as Cr.sub.2 O.sub.3, is in a quantity of between 6 and 30% by weight; PA1 the tin, expressed as SnO, is in a quantity of between 0.1 and 3.5% by weight; PA1 the alkaline metal, expressed as M.sub.2 O, is in a quantity of between 0.4 and 3% by weight; PA1 the silica is in a quantity of between 0.08 and 3% by weight, the complement to 100 being alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.