Method for non-catalytic delignification of biomass inside an apparatus

    公开(公告)号:US11939721B2

    公开(公告)日:2024-03-26

    申请号:US17423106

    申请日:2020-01-13

    Inventor: Nitin Kolhe

    CPC classification number: D21C3/20 D21C1/02 D21C3/263 D21H11/02 D21H11/12

    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.

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