Process for the conversion of sulfates to sulfonates
US5268504A · kind A · utility
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Key dates
| Filing date | Jul 28, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Jul 28, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for increasing the selectivity in converting sulfates to sulfonates following ethoxylation and sulfation of alcohols. It is demonstrated that minimization of unethoxylated and monoethoxylated alcohols before the sulfation step will substantially reduce hydration to alcohols and increase the selectivity of the subsequent sulfonation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.