A BINDER COMPOSITION FREE OF PHENOL COMPOUND

    公开(公告)号:US20240199819A1

    公开(公告)日:2024-06-20

    申请号:US18286583

    申请日:2021-04-15

    发明人: Sanna VALKONEN

    IPC分类号: C08H7/00 C08L97/00

    CPC分类号: C08H6/00 C08L97/005

    摘要: The invention relates to a method for producing a binder composition, without using a compound selected from the class of phenols. The method comprises: (i) heating an aqueous composition comprising lignin in the presence of a catalyst; (ii) mixing a crosslinking agent with the aqueous composition from (i) and heating the same at a temperature of 60-95° C. for pre-polymerizing lignin and crosslinking agent; (iii) mixing tannin with the aqueous composition from (ii) for polymerizing tannin with the pre-polymerized lignin and crosslinking agent until a binder composition with a predetermined viscosity value is formed; wherein the molar ratio of crosslinking agent to lignin and tannin is 0.5-1.7.

    Lignin depolymerization process using chemicals recoverable by the kraft recovery cycle

    公开(公告)号:US11802183B2

    公开(公告)日:2023-10-31

    申请号:US16611668

    申请日:2018-05-08

    申请人: FPInnovations

    IPC分类号: C08H7/00 C08J11/16

    摘要: The present relates to a process for the depolymerization of lignin using chemicals recoverable by the soda or kraft mill recovery cycles. The process involves the use of sodium hydroxide or white liquor to depolymerize lignin in black liquor or other lignins (e.g. hydrolysis lignin, kraft lignin) by conducting the reaction at 170-250° C. for up to 3 hours in the presence or absence of a co-solvent and a capping agent. The depolymerized lignin is then obtained by acidifying the reaction products to a low pH to precipitate the de-polymerized lignin, followed by particle coagulation, cake filtration and washing with acid and water to obtain a purified depolymerized lignin product.

    Method for the preparation of a lignin prepolymer

    公开(公告)号:US11643508B2

    公开(公告)日:2023-05-09

    申请号:US16616013

    申请日:2018-05-29

    申请人: ANNIKKI GMBH

    IPC分类号: C08H7/00 C08L97/00 C09D197/00

    摘要: The present invention relates to a method for the preparation of a lignin prepolymer, comprising (a) providing a lignin; (b) reacting the lignin with a hydroxyl functionalization reagent to provide a lignin derivative containing at least one hydroxyl group, said hydroxyl group being obtained as a result of the interaction between the lignin and the hydroxyl functionalization reagent (c) reacting the lignin derivative obtained in step (b) with a functionalization reagent selected from the group consisting of fatty acids, fatty acid derivatives and mixtures thereof capable to react with the lignin derivative resulting in a covalent bond between the fatty acid and/or or the fatty acid derivative and the lignin derivative.