Aromatic sulfonation reactions
US7009077B2 · kind B2 · utility
0Cited by
6References
19Claims
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Key dates
| Filing date | Oct 5, 2001 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Jul 2, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the sulfonation of an aromatic compound wherein the aromatic compound and sulfonating agent are admixed in the presence of an ionic liquid is described. The method for the sulfonation of aromatic compounds in (e.g. water stable) ionic liquids offers advantages over conventional sulfonation reactions. These are that no by-products form, the ionic liquid is not consumed, and the sulfonating agent (e.g. SO3) is relatively inexpensive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.