Process for sulfonating halobenzene derivatives with sulfur trioxide
US9394245B2 · kind B2 · utility
1Cited by
11References
20Claims
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Key dates
| Filing date | Aug 13, 2013 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Aug 13, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for sulfonating at least one halobenzene with sulfur trioxide (SO3) comprising the following steps: Step 1. manufacturing a gaseous mixture [mixture (M)] comprising SO3 and at least one additional gas different from SO3 by oxidizing sulfur dioxide in the presence of at least one catalyst, wherein the SO3 content in mixture (M) is from 1 to 95% by volume, relative to the total volume of mixture (M); and step 2 contacting said mixture (M) with said at least one halobenzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.