A method for non-catalytic delignification of biomass inside an apparatus
AssigneeLignopura Agrotech Pvt Ltd.
InventorNitin KOLHE
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Abstract
The present invention provides a method for non-catalytic delignification of biomass, without externally added catalyst, with a mixed solvent of oxygenated organic solvent and water in the presence of an oxidant, at moderate temperature and pressure. Further, the separation of delignified cellulose from liquid mixture is carried out at around equivalent process conditions. Low modified kappa number delignified cellulose is obtained after separation of a liquid mixture containing a mixed solvent, hemicelluloses, lignin and traces of miscellaneous compounds. Furthermore, the method has lower chemical consumption in the downstream process, ease of operation and robustness.
Claims14
1-11. (canceled)
A method for non-catalytic delignification of biomass, the method comprising the steps of:
- adding a stream of water-washed cellulose-rich lignocellulosic biomass inside an apparatus;
- and
- treating the stream with a treatment liquid in presence of an oxygen-containing gas in the apparatus at a temperature of 120-170° C. and at an initial pressure of 3 to 100 bar, wherein the treatment liquid is a mixture of water and an oxygenated solvent.
Dependencies are inferred from the claim text.