公开(公告)号：US11905656B2

公开(公告)日：2024-02-20

申请号：US17405028

申请日：2021-08-18

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk ,  Matthew Dewit ,  Andrew M Corbett

IPC: D21C3/04 ,  D21C9/16 ,  D21C3/00 ,  C01B15/04 ,  C09K3/00

CPC classification number: D21C3/04 ,  C01B15/04 ,  C09K3/00 ,  D21C3/003 ,  D21C9/163

Abstract: A process to separate lignin from a lignocellulosic feedstock, said process comprising the steps of:



providing said lignocellulosic feedstock;

providing a composition comprising;

an acid;
a modifying agent selected from the group consisting of: sulfamic acid; imidazole; imidazole derivatives; taurine; a taurine derivative; a taurine-related compound; alkylsulfonic acid; arylsulfonic acid; triethanolamine; and combinations thereof;
a peroxide salt; and
a peroxide;


exposing said lignocellulosic feedstock to said composition for a period of time sufficient to depolymerize substantially all of the lignin present in said lignocellulosic feedstock into lignin oligomers and lignin monomers;

wherein said process is carried out at atmospheric pressure.

公开(公告)号：US12252844B2

公开(公告)日：2025-03-18

申请号：US17405026

申请日：2021-08-18

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk ,  Matthew Dewit ,  Andrew M 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 capping agent; and a peroxide; for a period of time sufficient to remove substantially all (at least 80%) of the lignin present on said plant material. Also disclosed are compositions to accomplish such delignification and processes using such.

公开(公告)号：US11821139B2

公开(公告)日：2023-11-21

申请号：US17405031

申请日：2021-08-18

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk ,  Matthew Dewit ,  Andrew M Corbett

IPC: D21C3/04

CPC classification number: D21C3/04

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 modifiying agent selected from the group consisting of: sulfamic acid; imidazole; N-alkylimidazole; taurine; a taurine derivative; a taurine-related compound; alkylsulfonic acid; arylsulfonic acid; triethanolamine; and combinations thereof;
a metal oxide; and
a peroxide;

for a period of time sufficient to remove substantially all (at least 80%) of the lignin present on said plant material.

公开(公告)号：US12071724B2

公开(公告)日：2024-08-27

申请号：US17405029

申请日：2021-08-18

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk ,  Matthew Dewit ,  Andrew M Corbett

IPC: D21C3/04 ,  C01B15/04 ,  C09K3/00

CPC classification number: D21C3/04 ,  C01B15/04 ,  C09K3/00

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; taurine; a taurine derivative; a taurine-related compound; alkylsulfonic acid; aryl sulfonic acid; triethanolamine; and combinations thereof;
a metal salt; and
a peroxide;


for a period of time sufficient to remove substantially all (at least 80%) of the lignin present on said plant material.

公开(公告)号：US11982052B2

公开(公告)日：2024-05-14

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 M Corbett

IPC: D21C3/04 ,  D21C3/00 ,  D21C3/20 ,  D21C9/16

CPC classification number: D21C3/04 ,  D21C3/003 ,  D21C3/20 ,  D21C9/163

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.

公开(公告)号：US11668047B2

公开(公告)日：2023-06-06

申请号：US17405027

申请日：2021-08-18

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk ,  Matthew DeWit ,  Andrew M Corbett

IPC: D21C3/04

CPC classification number: D21C3/04

Abstract: Method for controlled delignification of lignocellulosic feedstock, said method comprising the steps of:



providing a reactive phase of pH less than 1, said reactive phase comprising:

water;
sulfuric acid;
a source of peroxide;
a modifying agent, said modifying agent adapted to control the reactivity of the sulfuric acid;


providing a holding phase, said holding phase comprising an organic solvent which does not react with the aqueous acidic composition;
combining said reactive phase and holding phase to form a reaction mixture;
exposing a lignocellulosic material to said reaction mixture for a period of time sufficient to allow delignification of the lignocellulosic material.