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：US11965289B2

公开(公告)日：2024-04-23

申请号：US17407515

申请日：2021-08-20

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk

IPC: D21C3/00 ,  D21C3/04 ,  D21C3/22

CPC classification number: D21C3/003 ,  D21C3/04 ,  D21C3/22

Abstract: An aqueous composition comprising: sulfuric acid; a heterocyclic compound; an alkanesulfonic acid; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

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.

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：US12123138B2

公开(公告)日：2024-10-22

申请号：US17407477

申请日：2021-08-20

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk

IPC: D21C3/06 ,  D21C1/04 ,  D21C3/00 ,  D21C3/04 ,  D21C9/16

CPC classification number: D21C3/06 ,  D21C1/04 ,  D21C3/003 ,  D21C3/04 ,  D21C9/16

Abstract: An aqueous composition comprising: sulfuric acid; a modifying agent comprising an arylsulfonic acid; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

公开(公告)号：US12065780B2

公开(公告)日：2024-08-20

申请号：US17407528

申请日：2021-08-20

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: An aqueous composition comprising: sulfuric acid; a modifying agent comprising a carbonyl-containing nitrogenous base compound; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

公开(公告)号：US11905171B2

公开(公告)日：2024-02-20

申请号：US17407401

申请日：2021-08-20

Applicant: SixRing Inc.

Inventor： Clay Purdy ,  Markus Weissenberger ,  Markus Pagels ,  Kyle G Wynnyk

IPC: C01B17/69 ,  D21C3/04 ,  C08H8/00

CPC classification number: C01B17/69 ,  C08H8/00 ,  D21C3/045

Abstract: An aqueous composition comprising: sulfuric acid; a modifying agent comprising an amine group; and a peroxide. The amine group can include triethanolamine, diethanolamine, monoethanolamine, pyrrolidine, ethylenediamine, diethylamine, triethylamine, DIPEA, cyclohexylamine, piperidine, morpholine, DBU, benzylamine, and combinations thereof. The composition is capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place. The composition can be used in processing and depolymerization of cellulose from a plant source.