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    COMBINATION APPROACH TO DELIGNIFICATION OF BIOMASS UNDER AMBIENT CONDITIONS
    33.
    发明申请
    COMBINATION APPROACH TO DELIGNIFICATION OF BIOMASS UNDER AMBIENT CONDITIONS 有权

    公开(公告)号：US20220186434A1

    公开(公告)日：2022-06-16

    申请号：US17404199

    申请日：2021-08-17

    Applicant: SixRing Inc.

    Inventor： Clay PURDY ,  Markus WEISSENBERGER ,  Markus PAGELS ,  Kyle G. WYNNYK ,  Matthew DEWIT ,  Andrew C. CORBETT

    IPC: D21C3/04 ,  D21C3/00 ,  D21C9/16

    Abstract: Method of delignification of plant material, said method comprising: providing said plant material comprising cellulose fibres and lignin; exposing said plant material requiring to a composition comprising: an acid; a modifying agent selected from the group consisting of: sulfamic acid; imidazole; N-alkylimidazole derivative; taurine; a taurine derivative; a taurine-related compound; alkylsulfonic acid; arylsulfonic acid; triethanolamine; and combinations thereof; a metal oxide; and a peroxide; adding an organic solvent to the resulting mixture; allowing a delignification reaction to occur for a period of time sufficient to remove at least 80% of the lignin present on said plant material.

    Modified alkanesulfonic acid and uses thereof
    34.
    发明授权
    Modified alkanesulfonic acid and uses thereof 有权

    公开(公告)号：US12276067B2

    公开(公告)日：2025-04-15

    申请号：US17187354

    申请日：2021-02-26

    Applicant: SixRing Inc.

    Inventor： Clay Purdy ,  Markus Weissenberger ,  Kyle G. Wynnyk ,  Karl W. Dawson

    IPC: D21C3/06 ,  C01B15/08 ,  D21C1/04 ,  D21C3/00

    Abstract: Method of delignification of plant material, said method comprising: providing said plant material comprising cellulose fibers and lignin; exposing said plant material requiring to a composition comprising: alkanesulfonic acid; and a peroxide, wherein said alkylsulfonic acid and peroxide are present in a molar ratio ranging 1:1 to 15:1 and the time of exposure is sufficient to remove substantially all of the lignin present on said plant material. Compositions capable of achieving delignification are also disclosed.

    NOVEL PRETREATMENT FOR RECALCITRANT BIOMASS FOR BIOGAS GENERATION
    35.
    发明申请
    NOVEL PRETREATMENT FOR RECALCITRANT BIOMASS FOR BIOGAS GENERATION 有权

    公开(公告)号：US20250051806A1

    公开(公告)日：2025-02-13

    申请号：US18437615

    申请日：2024-02-09

    Applicant: SixRing Inc.

    Inventor： Corynne O'Farrell ,  Julie Greer ,  Markus Weissenberger ,  Alejandra Enriquez

    IPC: C12P5/02

    Abstract: In one example, a method includes providing a recalcitrant biomass; exposing said highly recalcitrant biomass to a delignification reaction wherein said delignification reaction comprising the exposure of said highly recalcitrant biomass to an acidic composition comprising a modified Caro's acid for a period of time sufficient to yield a treated cellulose which has a final lignin content of up to 100% less than the initial lignin content of the biomass; providing a digester whose contents comprises at least one inoculum comprising a microbial community capable of converting organic material into methane under anaerobic conditions; adding said treated cellulose to said digester; allowing sufficient time for the digester to degrade at least a portion of said treated cellulose and optionally, at least a portion of said organic material to yield a biogas composition comprising methane; capturing said biogas composition; and storing said biogas.

    MODIFIED SULFURIC ACID AND USES THEREOF
    36.
    发明公开
    MODIFIED SULFURIC ACID AND USES THEREOF 审中-公开

    公开(公告)号：US20240263394A1

    公开(公告)日：2024-08-08

    申请号：US18638250

    申请日：2024-04-17

    Applicant: SixRing Inc

    Inventor： Clay PURDY ,  Markus WEISSENBERGER ,  Markus PAGELS ,  Kyle G WYNNYK

    IPC: D21C3/04 ,  D21C3/00 ,  D21C9/16

    CPC classification number: D21C3/04 ,  D21C3/003 ,  D21C9/163

    Abstract: A one-pot process to separate lignin from a lignocellulosic feedstock includes providing a vessel; providing a lignocellulosic feedstock; providing a composition comprising an acid, a modifying agent comprising a carbonyl-containing nitrogenous base compound, and a peroxide; exposing the lignocellulosic feedstock to the composition in the vessel for a period of time sufficient to remove at least 80% of the lignin present in the lignocellulosic feedstock; and optionally, removing a liquid phase comprising dissolved lignin fragments from a solid phase comprising cellulose fibres.

    IMPROVEMENTS IN BIOMASS DELIGNIFICATION
    38.
    发明公开
    IMPROVEMENTS IN BIOMASS DELIGNIFICATION 审中-公开

    公开(公告)号：US20240209159A1

    公开(公告)日：2024-06-27

    申请号：US18392952

    申请日：2023-12-21

    Applicant: SixRing Inc.

    Inventor： Alejandra ENRIQUEZ ,  Matthew DEWIT ,  Kyle G. WYNNYK ,  Markus WEISSENBERGER

    IPC: C08H8/00 ,  C08H7/00

    CPC classification number: C08H8/00 ,  C08H6/00

    Abstract: A method for removing the constituents of a biomass into separate streams, where said method comprises the following steps:



    Step 1: providing a biomass feedstock comprising: cellulose; hemicellulose; and lignin;
    Step 2: exposing said biomass to a first acidic composition comprising an acid selected from the group consisting of: mineral acids; organic acids; modified acids; synthetic acids; and combinations thereof; for a first period of time sufficient to dissolve at least 50% of the hemicellulose present in said biomass;
    Step 3: separating and recovering into a first liquid stream, the dissolved hemicellulose from the remaining biomass;
    Step 4: exposing the remaining biomass mixture to a modified Caro's acid selected from the group consisting of:

    composition A; composition B and Composition C;
    wherein said composition A comprises:

    sulfuric acid in an amount ranging from 20 to 70 wt % of the total weight of the composition;
    a compound comprising an amine moiety and a sulfonic acid moiety selected from the group consisting of: taurine; taurine derivatives; and taurine-related compounds; and
    a peroxide;


    wherein said composition B comprises:

    an alkylsulfonic acid; and
    a peroxide; wherein the acid is present in an amount ranging from 40 to 80 wt % of the total weight of the composition and where the peroxide is present in an amount ranging from 10 to 40 wt % of the total weight of the composition;


    wherein said composition C comprises:

    sulfuric acid;
    a compound comprising an amine moiety;
    a compound comprising a sulfonic acid moiety; and
    a peroxide;


    for a first period of time sufficient to dissolve enough of the lignin present in said remaining biomass mixture to obtain a kappa number for the cellulose of less than 5;
    for a first period of time sufficient to dissolve enough of the lignin present in said remaining biomass mixture to obtain a kappa number for the cellulose of less than 5;


    Step 5: recovering into a second liquid stream the dissolved lignin from the resulting reaction mixture, wherein said solid portion comprises cellulose fibers with, at most, 7.5 wt % hemicellulose.

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