Process for the purification of aldehyde impurities
US6448371B1 · kind B1 · utility
3Cited by
15References
20Claims
0Family size
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Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Oct 17, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel process for the purification of poloxamers which contain aldehyde impurities, and particularly for the purification of the poloxamers named poloxamer 188 and poloxamer 407, which process includes dissolving the poloxamer(s) in a solvent which solvent may optionally contain an acid or a mixture of acids; if the solvent in which the poloxamer(s) has been dissolved is free from acid, acid is added; whereafter the aldehydes are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.