Selective introduction of active sites for hydroxylation of benzene
US5808167A · kind A · utility
5Cited by
9References
15Claims
0Family size
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Key dates
| Filing date | Aug 20, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Aug 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A zeolite catalyst, which can be used in a process for hydroxylating benzene to phenol, is treated with an aqueous solution containing ferric or ferrous ions, and is treated with an aqueous solution containing dithionate ions. The treated catalyst exhibits improved selectivity and stability in the benzene hydroxylation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.