Back to results
US 11,377,790 B2Granted
Method for extracting biomass
AssigneeCH-Bioforce Oy
InventorSebastian Von Schoultz
Life of this patent
Estimating the term…
Abstract
Method for extraction of biomass with water in order to separate hemicelluloses from a fibrous structure. The biomass is impregnated under reduced pressure with the extraction fluid in order to prevent the degradation of the components to be extracted. During extraction the extract is circulated through the fiber matrix in order to remove unwanted components from the extract. The extract is reused for extracting untreated biomass in order to increase the consistency of the extract.
Claims11
A method of treating biomass containing a fibrous structure and polysaccharides, comprising:
- impregnating the biomass with water by removing air and oxygen gas to produce a reduced pressure of at least 0.3 bar prior to an extractive treatment;
- subjecting the biomass to extractive treatment in which it is heated in an aqueous phase at a pressure below 8 bar and at a temperature about 150° C. to under 160° C.;
- separating a polysaccharide-rich extract from the biomass into a reduced oxygen gas environment as a first fraction in said aqueous phase;
- recovering the fibrous structure of the biomass as a second fraction;
- recirculating the aqueous phase through the biomass in order to extract additional biomass,
- wherein the biomass is wood-based.
3 more elements
Dependencies are inferred from the claim text.