Method for purifying dimethyl sulphoxide (DMSO)
US5990356A · kind A · utility
4Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | May 12, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C315/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This process consists in placing liquid DMSO with a low water content in contact with an ion exchange resin in --SO.sub.3 H form, and then in separating the liquid from the resin. The DMSO thus obtained has a content of iron cation tracer element of less than or equal to 1 ppb and a content of Na cation tracer element of less than or equal to 2 ppb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.