Process for preparing sulphonic acids and sulphonates
US4177208A · kind A · utility
6Cited by
0References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Apr 12, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for separating sulphonic acids from a paraffin sulphonic acid solution containing in addition to the paraffin sulphonic acids, sulphonic acid, water and optionally non-sulphonated paraffins by mixing the solution with a slightly polar alcohol having solubility in water of less than 7 percent to form an aqueous phase and an organic phase, separating the phases, neutralizing the organic phase and recovering the paraffin sulphonic acids from the neutralized organic phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.