Refining of reaction grade 2-acrylamido-2-methylpropane sulfonic acid
US4650614A · kind A · utility
3Cited by
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31Claims
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Key dates
| Filing date | Jul 27, 1982 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Jul 27, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Reaction grade 2-acrylamido-2-methylpropane sulfonic acid is refined by mildly heating a slurry-like suspension formed of the acid and a liquid monohydric alcohol, recovering the acid from the alcohol and subsequently drying it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.