Production of olefins
US6646176B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1998 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Dec 5, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the catalytic cracking of an olefin-containing feedstock which is selective towards light olefins in the effluent, the process comprising contacting a hydrocarbon feedstock containing at least one olefin with a MFI-type crystalline silicate catalyst having a silicon/aluminum atomic ratio of at least about 180, which has been obtained by pretreating so as to increase the silicon/aluminum atomic ratio thereof by heating the catalyst in steam and de-aluminating the catalyst by treating the catalyst with a complexing agent for aluminum, at an inlet temperature of from 500 to 600° C. and at an olefin partial pressure of from 0.1 to 2 bars to produce an effluent with an olefin content of lower molecular weight than that of the feedstock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.