Direct epoxidation process using a mixed catalyst system
US6498259B1 · kind B1 · utility
29Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Oct 19, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Oct 19, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The liquid-phase epoxidation reaction of an olefin with hydrogen and oxygen in the presence of a catalyst mixture containing a titanium zeolite and a supported catalyst surprisingly produces less ring-opened products such as glycols when performed in the presence of a buffer. This is particularly surprising because a typical palladium on titanium zeolite catalyst is little effected by the presence of a buffer. Surprisingly, the use of a buffer also typically improves the activity of the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.