Process for washing a polysaccharide-based material which has been subjected to an oxidation
US9290583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2010 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Apr 28, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for washing a polysaccharide-based material which has been subjected to oxidation by at least one oxidizing agent, the said process comprising a first stage of washing with a first densified fluid which is inert with regard to the said oxidizing agent, characterized in that the first stage is followed by a second stage of washing with a washing composition comprising at least one second inert densified fluid and at least one alcohol. The said process according to the invention can additionally comprise a third stage of washing with a third inert densified fluid in order to remove the said alcohol deposited on the said polysaccharide-based material during the said second washing stage. Preferably, the said inert densified fluids are supercritical carbon dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.