Patent ID: 9290583
Filing Date: 2016-03-22
CPC Classification: B08B,C08B,Y02P

Claim Text:
1. A process for washing a polysaccharide-based material which has been subjected to oxidation by at least one oxidizing agent, the process comprising; a first washing stage in which the polysaccharide-based material is flushed with a first densified fluid which is inert with regard to the oxidizing agent; a second washing stage in which the polysaccharide-based material after the first washing stage is flushed with a washing composition comprising at least one second inert densified fluid and at least one alcohol, the second inert densified fluid is selected from the group consisting of carbon dioxide, xenon, argon, krypton, ethane, propane, hexafluoroethane, trifluoromethane, chlorotrifluoromethane, chlorodifluoromethane, dichlorodifluoromethane, and mixtures thereof, and a third washing stage in which the polysaccharide-based material after the second washing stage is flushed with a third inert densified fluid, wherein the polysaccharide-based material which has been subjected to oxidation is oxidized cellulose.