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    LIGNIN COMPOSITION
    2.
    发明申请
    LIGNIN COMPOSITION 审中-公开

    公开(公告)号：WO2022117391A1

    公开(公告)日：2022-06-09

    申请号：PCT/EP2021/082565

    申请日：2021-11-22

    Applicant: KØBENHAVNS UNIVERSITET

    Inventor： OROZCO, Yohanna Cabrera

    IPC: D21C11/00 ,  C07G1/00 ,  C08H7/00 ,  C08L97/00 ,  C10G1/04

    Abstract: The present invention relates to a process for producing a lignin composition, which process comprises: - providing a lignin slurry comprising water and a water miscible organic solvent; - subjecting the lignin slurry to extraction at an extraction temperature of less than 100°C for an extraction time of at least 1 minute to provide an extracted slurry; - removing liquid from the extracted slurry to provide an extracted lignin; and - suspending the extracted lignin in a polar organic solvent to provide a lignin composition having a dry matter content of at least 30% by weight. The present invention also relates to a lignin composition comprising hardwood Kraft lignin and a polar organic solvent, which composition has a dry matter content of at least 30% by weight. The present invention also relates to use of the lignin composition as a fuel.

    HYDROLYSIS OF CELLULOSE ESTERS
    3.
    发明申请
    HYDROLYSIS OF CELLULOSE ESTERS 审中-公开

    公开(公告)号：WO2021198558A1

    公开(公告)日：2021-10-07

    申请号：PCT/FI2021/050219

    申请日：2021-03-29

    Applicant: CHEMPOLIS OY

    Inventor： ROUHIAINEN, Maija ,  PELTOLA, Sirpa ,  ROUSU, Pasi

    IPC: C08B3/24 ,  D21C11/00 ,  D21C11/0007 ,  D21C11/0085

    Abstract: A method of hydrolysis of cellulose esters, comprising providing a solution containing cellulose esters; adding a hydrotropic agent to the solution containing cellulose esters; performing hydrolysis of cellulose esters by adding an aqueous solution to the solution containing cellulose esters to provide a mixture containing cellulose and acid(s) derived from cellulose esters.

    A METHOD AND A SYSTEM FOR ADJUSTING PH OF GREEN LIQUOR DREGS
    6.
    发明申请
    A METHOD AND A SYSTEM FOR ADJUSTING PH OF GREEN LIQUOR DREGS 审中-公开

    公开(公告)号：WO2021032913A1

    公开(公告)日：2021-02-25

    申请号：PCT/FI2020/050536

    申请日：2020-08-18

    Applicant: VALMET TECHNOLOGIES OY

    Inventor： VETTENRANTA, Aino

    IPC: D21C11/00 ,  D21C11/06 ,  D21C11/10 ,  D21C11/12

    Abstract: The specification relates to a method and a system for adjusting pH of green liquor dregs. The method comprises contacting a slurry containing green liquor dregs (100, 200, 300, 400, 500) with flue gas (101, 201, 301, 401, 501). The system comprises a recovery boiler (105) configured to burn black liquor to produce smelt, a smelt dissolving tank (107) configured to dissolve the smelt to produce green liquor comprising green liquor dregs, and a green liquor clarifier/filter (103) and/or a dregs filter (104) configured to separate a slurry containing green liquor dregs (100, 200, 300, 400, 500) from the green liquor. The system further comprises a vessel (102, 202, 302, 402) configured to receive a slurry containing green liquor dregs (100, 200, 300, 400, 500) and a gas inlet (210, 310, 410, 510) configured to convey flue gas (101, 201, 301, 401, 501) to be contacted with the slurry containing green liquor dregs (100, 200, 300, 400, 500).

    METHOD OF CONTROLLING THE CHEMICAL BALANCE OF A PULP MILL
    9.
    发明申请
    METHOD OF CONTROLLING THE CHEMICAL BALANCE OF A PULP MILL 审中-公开

    公开(公告)号：WO2019058032A1

    公开(公告)日：2019-03-28

    申请号：PCT/FI2018/050691

    申请日：2018-09-25

    Applicant: ANDRITZ OY

    Inventor： PEHU-LEHTONEN, Lauri

    IPC: D21C9/14 ,  D21C11/00 ,  D21C11/06

    Abstract: The present invention related to a method to optimise the chemical balance at a sulfate pulp mill, which produces at least pulp bleached with chlorine dioxide and has a chlorine dioxide plant using at least chlorate, methanol and sulfuric acid for making chlorine dioxide. The method comprises at least the following steps: a), gases from the mill's concentrated non-condensable gas system are incinerated in order to form a gas containing sulfur dioxide, which is treated to produce concentrated sulfuric acid, and b), raw methanol from the mill processes is purified to produce methanol, and c), side streams containing sodium compounds and/or sulfur compounds produced by mill processes are used as make-up chemicals, wherein the production of chlorine dioxide uses the sulfuric acid produced in step a) and methanol purified in step b), with a sulfuric acid concentration of 94-99%, preferably 95-98%, and using in step c) sesquisulfate or sodium sulfate produced during the production of chlorine dioxide.

    PROPAGATION OF YEAST FOR REMOVAL OF SUGARS FROM SPENT SULFITE LIQUOR
    10.
    发明申请
    PROPAGATION OF YEAST FOR REMOVAL OF SUGARS FROM SPENT SULFITE LIQUOR 审中-公开

    公开(公告)号：WO2018183498A1

    公开(公告)日：2018-10-04

    申请号：PCT/US2018/024846

    申请日：2018-03-28

    Applicant: DOMTAR PAPER COMPANY, LLC

    Inventor： NARENDRANATH, Neelakantam

    IPC: D21C11/00

    Abstract: Methods for production of yeast biomass and removal of sugar from red liquor by propagating yeast on sugars in red liquor byproduct of the sulfite pulping process are disclosed. Yeast are propagated using the sugars in red liquor as a carbon source, thereby consuming the sugars and producing a composition of lignosulfonates that has a reduced sugar content. Disclosed methods allow for separation of sugars from lignosulfonates in red liquor without costly ultrafiltration or nanofiltration processes and also produce valuable yeast biomass.

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