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    A method for treating starch in pulp, paper and board making processes
    1.
    发明申请
    A method for treating starch in pulp, paper and board making processes 审中-公开

    公开(公告)号：US20190024306A1

    公开(公告)日：2019-01-24

    申请号：US15755591

    申请日：2016-08-26

    申请人： Kemira Oyj

    发明人： Matti Hietaniemi ,  Jaakko Ekman ,  Asko Karppi ,  Marko Kolari

    IPC分类号： D21C5/00 ,  D21C5/02 ,  D21H11/14 ,  D21H21/36

    摘要： The invention relates to a method for treating starch in pulp, paper and board making processes, in which processes recycled fibre material is used as raw material wherein the recycled fibre material is pulped in a pulper and obtaining a pulp flow comprising an aqueous phase and at least recycled fibres and starch dispersed in the aqueous phase. The method comprising the following steps: —adding amylase enzyme inhibitor and/or at least one biocide to pulp flow or to an aqueous process flow comprising starch for preventing starch degradation, and—adding an amphoteric polymer obtained by copolymerisation of (meth)acrylamide with cationic and anionic monomers to pulp flow or to an aqueous process flow comprising starch for binding starch to the fibres.

    Method for controlling growth of microorganisms and/or biofilms in an industrial process
    6.
    发明授权
    Method for controlling growth of microorganisms and/or biofilms in an industrial process 有权

    公开(公告)号：US11643782B2

    公开(公告)日：2023-05-09

    申请号：US16640069

    申请日：2018-08-28

    申请人： Kemira Oyj

    发明人： Jaakko Simell ,  Marko Kolari ,  Jonas Konn

    IPC分类号： D21H21/04 ,  D21H21/36 ,  D21H17/09 ,  D21H17/14

    CPC分类号： D21H21/04 ,  D21H17/09 ,  D21H17/14 ,  D21H21/36

    摘要： Disclosed is a method for controlling a biofilm removing a formed biofilm and/or controlling a growth of microorganisms, preferably bacteria, in an aqueous environment of an industrial manufacturing process including a cellulosic fibre material. A compound according to Formula I is administered to the aqueous environment, in which Formula I R1, R2 and R3 independently represent a hydrogen atom; halogen atom; hydroxy group; amino group; alkylamino group, alkyl group, hydroxyalkyl group, haloalkyl group or alkoxy group having 1 to 4 carbon atoms; or an acylamido group having 1 to 10 carbon atoms; and A represents 2-thiazolamine; 2-propenenitrile; 2-propenoic acid; alkyl ester or hydroxyalkyl ester of 2-propenoic acid having 1 to 4 carbon atoms; or —CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms, with the proviso that the compound according to Formula I is not 3-[(4-methylphenyl)sulphonyl]-2-propenenitrile or 4-amino-N-2-thiazolyl-benzenesulphonamide.

    Use of a composition and method for reducing bacterial spores in pulp suspension
    7.
    发明授权
    Use of a composition and method for reducing bacterial spores in pulp suspension 有权

    公开(公告)号：US11160282B2

    公开(公告)日：2021-11-02

    申请号：US16093671

    申请日：2017-05-12

    申请人： Kemira Oyj

    发明人： Juhana Ahola ,  Marko Kolari

    IPC分类号： A01N47/44 ,  A01N33/04 ,  A01N43/80

    摘要： The invention relates to use of a composition comprising a cationic surfactant, which comprises a primary or secondary ammonium head group and a linear unsubstituted C12-alkyl tail, for inducing germination of bacterial endospores in pulp suspension for making of paper, board or the like. The invention relates also to a method for quantitatively reducing bacterial endospores in pulp suspension for making of paper, board or the like. The method comprises obtaining of aqueous pulp suspension, and administering the said composition to the pulp suspension. The cationic surfactant is allowed to interact with bacterial endospores in the pulp suspension. Germination of endospores and destroying microorganisms is thus induced.