Process for the isolation under mild conditions of paraffinsulfonate and sulfuric acid from reaction mixtures from paraffin sulfoxidation
US4680147A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1985 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Dec 2, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the isolation under mild conditions of paraffinsulfonate from the aqueous reaction mixtures which result from the sulfoxidation of n-paraffins, from which sulfur dioxide has been removed by degassing, and which contain higher molecular weight sulfonic acids, sulfuric acid, n-paraffins and water, in which aliphatic alcohols having 2 to 8 carbon atoms and organic solvents, which are insoluble in water or miscible with water to only a limited extent, are simultaneously allowed to act on the reaction mixtures, the aqueous phase which has separated out and contains sulfuric acid is removed, and the product phase containing paraffinsulfonates is neutralized, evaporated, and the remaining paraffin is driven out with superheated steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.