Process for producing light olefins
US5744680A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1995 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Aug 10, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/85
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is provided for the production of light olefins from an oxygenate feedstream. The oxygenate feedstream in the presence of a diluent is passed to a reaction zone containing a SAPO catalyst selective for the conversion of at least a portion of the feedstock into light olefins producing a reactor effluent comprising water, methane, and light olefins. The water is removed and the remaining reactor effluent is separated into a light fraction comprising methane and a light olefin stream. At least a portion of the light fraction is returned to be admixed with the feedstream as the diluent. This operation solves the problem of reducing water in the reaction zone which was found to adversely affect the activity of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.