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1. WO2022126229 - NOVEL APPROACH TO BIOMASS DELIGNIFICATION

Publication Number WO/2022/126229
Publication Date 23.06.2022
International Application No. PCT/CA2021/000082
International Filing Date 18.08.2021
IPC
D21C 3/04 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
3Pulping cellulose-containing materials
04with acids, acid salts, or acid anhydrides
C07G 1/00 2011.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
GCOMPOUNDS OF UNKNOWN CONSTITUTION
1Low-molecular-weight derivatives of lignin
C08H 7/00 2011.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
HDERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
7Lignin; Modified lignin; High-molecular-weight products derived therefrom
C08H 8/00 2010.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
HDERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
8Macromolecular compounds derived from lignocellulosic materials
C08J 11/10 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
11Recovery or working-up of waste materials
04of polymers
10by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
C09K 3/00 2006.1
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
3Materials not provided for elsewhere
Applicants
  • SIXRING INC. [CA]/[CA]
Inventors
  • PURDY, Clay
  • WEISSENBERGER, Markus
  • PAGELS, Markus
  • WYNNYK, Kyle, G.
  • DEWIT, Matthew
  • CORBETT, Andrew C.
Agents
  • PIGEON, Charles, O.
Priority Data
3,102,92518.12.2020CA
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) NOVEL APPROACH TO BIOMASS DELIGNIFICATION
(FR) NOUVELLE APPROCHE DE DÉLIGNIFICATION DE BIOMASSE
Abstract
(EN) 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.
(FR) L'invention concerne un procédé de séparation de la lignine à partir d'une charge d'alimentation lignocellulosique, ledit procédé comprenant les étapes suivantes : la fourniture de ladite charge lignocellulosique ; la fourniture d'une composition comprenant : un acide ; un agent modificateur choisi dans le groupe constitué par l'acide sulfamique, l'imidazole, les dérivés de l'imidazole, la taurine, un dérivé de la taurine, un composé apparenté à la taurine, l'acide alkylsulfonique, l'acide arylsulfonique, la triéthanolamine et leurs combinaisons ; un sel de peroxyde ; et un peroxyde ; l'exposition de ladite charge lignocellulosique à ladite composition pendant une période suffisante pour dépolymériser sensiblement toute la lignine présente dans ladite charge lignocellulosique en oligomères de lignine et monomères de lignine ; ledit procédé étant réalisé à la pression atmosphérique.
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