公开(公告)号：US20240052566A1

公开(公告)日：2024-02-15

申请号：US18447930

申请日：2023-08-10

Applicant: SixRing Inc.

Inventor： Tenzin LEKSMON ,  Leah FRAIBERG ,  Emhemmed YOUSSEF ,  Markus WEISSENBERGER

IPC: D21C3/04 ,  D21C3/22 ,  D21C3/26 ,  D21C7/10 ,  D21C7/08

CPC classification number: D21C3/04 ,  D21C3/222 ,  D21C3/266 ,  D21C7/10 ,  D21C7/08

Abstract: A process to perform a controlled exothermic delignification of biomass comprises providing a system having a first vessel and a second vessel, providing a biomass comprising lignin, hemicellulose and cellulose fibers placed into the first vessel, providing an aqueous acidic composition comprising a sulfuric acid component, providing a modifier component and providing a peroxide component. The biomass is exposed to the sulfuric acid component and peroxide component, thereby creating a reaction mass. The reaction mass is mixed and the sulfuric acid, modifier and peroxide components are allowed to come into contact with the biomass for a period of time sufficient for a delignification reaction to occur and to remove a predetermined amount of the lignin from the biomass. The predetermined amount is assessed by testing a first kappa number of the biomass. When the first kappa number of the biomass is reached, the biomass is transferred to the second vessel.

公开(公告)号：US20220267953A1

公开(公告)日：2022-08-25

申请号：US17407447

申请日：2021-08-20

Applicant: SixRing Inc.

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

IPC: D21C3/00

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