Modification of molecular sieve catalyst for reduced methane production during conversion of oxygenates to olefins
US6005155A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Dec 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/85
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for modifying a molecular sieve catalyst to reduce methane production during conversion of oxygenates to olefins. The molecular sieve catalyst comprises a separately synthesized framework comprising a material selected from the group consisting of silica, alumina, phosphate, and combinations thereof. The framework is contacted with a modifier, in the absence of a salt comprising a metal selected from the group consisting of manganese, zirconium, and hafnium, under conditions effective to modify the framework but insufficient to dealuminize or deironize the framework. The modifier comprises an oxygenated chelating agent comprising a parent compound which is readily removable from the framework by calcination to leave the modified molecular sieve catalyst. Also encompassed are the modified molecular sieve catalysts produced by the method, and a method of using the modified molecular sieve catalysts to reduce methane production during conversion of oxygenates to olefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.