Method for improving light olefin selectivity in an oxygenate conversion reaction
US6482999B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S585/906
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for converting oxygenates to light olefins. The method comprises contacting, in a reactor, a feedstock comprising oxygenates with a molecular sieve catalyst under conditions effective to convert the feedstock to a product including light olefins and by-products, the contacting causing carbonaceous deposits to form on at least a portion of the molecular sieve catalyst producing deactivated catalyst; removing a portion of the deactivated catalyst from the reactor; regenerating the portion of the deactivated catalyst under conditions effective to remove at least a portion of the carbonaceous deposits from the deactivated catalyst to form an at least partially regenerated catalyst; exposing at least a portion of the at least partially regenerated catalyst to at least a portion of the by-products to selectivate the portion of the at least partially regenerated catalyst to form light olefins; and contacting the selectivated portion of the at least partially regenerated catalyst with the feedstock to form the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.