Production of olefins
US5171921A · kind A · utility
106Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A steam activated catalyst containing phosphorus and H-ZSM-5 may be used to convert higher hydrocarbons to lower olefins, especially ethylene, propylene, butylenes and pentenes at a preferred temperature range of 500.degree. to 700.degree. C. and a preferred WHSV range of 10 to 1000 hr..sup.-1. Catalysts containing H-ZSM-5 with surface Si/Al ratios of 20 to 60 were found to undergo steam activation more readily and achieve higher activity than those catalysts which contained H-ZSM-5 with surface Si/Al ratios greater than 60.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.