Purification of alkanesulfonic acids using ozone
US4895977A · kind A · utility
4Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Dec 12, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The removal of oxidizable organic impurities which include alkylthiolsulfonate from alkanesulfonic acids by treatment with an ozone containing gas is disclosed. The treated products have improved color and odor and exhibit improved long-term color stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.