Rejuvenating SAPO molecular sieve with anhydrous liquid or vapor
US6498120B1 · kind B1 · utility
9Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Apr 26, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P30/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention is to a method of rejuvenating a molecular sieve. The method includes contacting a molecular sieve having a methanol uptake index of less than 1, or a catalyst containing molecular sieve having a methanol uptake index of less than 1, with anhydrous liquid or vapor until the methanol uptake index is increased by at least 10%. The rejuvenated molecular sieve or catalyst can be used to make an olefin product from an oxygenate-containing feedstock. The preferred molecular sieve is a silicoaluminophosphate (SAPO) molecular sieve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.