ZSM-5 zeolite materials doped with fluorine species for the synthesis of MTBE and other acido-catalyzed reactions
US6316379A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Jun 14, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided herein is are acidic Z5M-5 zeollte materials which are highly active and selective in the synthesis of methyl tert-butyl ether (MTBE) and similar ethers. The materials are obtained by the preparation method comprising the main steps of: i) impregnation of zeolites with fluorine species using ammonium fluoride as precursor, preferably with a F loading of ca.1.9.times.10.sup.3 mol.g.sup.-1 of zeolite; and ii) stepwise activation in air at preferably 250.degree. C. and then preferably at 300.degree. C. to 500.degree. C., preferably 450.degree. C. The method is preferably applied to desilicated ZSM-5 zeolite and provides conversion rates to MTBE superior to those obtained with prior art commercial AMBERLYSF.TM. resin (gas phase reaction at 70-80.degree. C.) is obtained. No by-products, commonly produced by prior art commercial organic resin catalyst, are detected in the product spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.