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    A METHOD AND A SYSTEM FOR MANUFACTURING CELLULOSE MATERIAL
    3.
    发明授权
    A METHOD AND A SYSTEM FOR MANUFACTURING CELLULOSE MATERIAL 有权

    公开(公告)号：EP2782937B1

    公开(公告)日：2018-06-13

    申请号：EP12852416.2

    申请日：2012-11-23

    Applicant: UPM-Kymmene Corporation

    Inventor： SIVONEN, Eino ,  VALTA, Kyösti ,  NUOPPONEN, Markus

    IPC: C08B11/12 ,  C08B1/06

    CPC classification number: D21C3/04 ,  C08B1/06 ,  C08B3/06 ,  C08B11/12 ,  D21C3/02 ,  D21C3/22 ,  D21H11/18

    Abstract: The invention relates to a method for manufacturing cellulose material, the method comprising introducing cellulose fibers as raw material pulp (1) to a system, adding an alkalizing agent into the system in order to absorb the alkalizing agent into the cellulose fibers (1), adding an anionic agent into the system in order to absorb said agent into the cellulose fibers (1), feeding the cellulose fibers (1) to a sieve plate press (6), performing a reaction between the cellulose fibers and the anionic agent at least partly in the sieve plate press (6) in order to produce anionized cellulose fibers having a degree of substitution between 0.05 and 0.35, wherein the reaction is performed at least partly at a consistency of at least 50%. In addition, the invention relates to a system for manufacturing cellulose material and to fibril cellulose produced from anionized cellulose fibers.

    CELLULOSE ETHERS AND METHOD OF PREPARING THE SAME
    7.
    发明公开
    CELLULOSE ETHERS AND METHOD OF PREPARING THE SAME 审中-公开
    纤维素和方法及其

    公开(公告)号：EP1334132A1

    公开(公告)日：2003-08-13

    申请号：EP01992723.5

    申请日：2001-10-31

    Applicant: BKI Holding Corporation

    Inventor： HARDING, Roger, Bruce ,  CRENSHAW, Susan, L., H. ,  GREGORY, Paul, Eugene ,  BROUGHTON, Denise, Hartnett

    IPC: C08B1/06 ,  C08B1/08 ,  C08B11/00

    CPC classification number: C08B11/04 ,  C08B1/06 ,  C08B1/08 ,  C08B11/00 ,  C08B11/12

    Abstract: The present invention have discovered that the solution rheology of cellulose ethers prepared from cellulose pulp is altered by mercerizing and recovering cellulose pulp before preparing the cellulose ethers. For example, the solution viscosity of carboxymethyl cellulose (CMC) produced from mercerized and recovered cellulose pulp is significantly greater than that produced from mercerized and recovered cellulose pulp is significantly greater than that produced from non-mercerized cellulosed pulp. The present invention provides a method of preparing cellulose ethers comprising the steps of (a) obtaining mercerized and recovered cellulose pulp, and (b) recovered cellulose pulp into the cellulose ethers. According to one embodiment, the cellulose pulp is southern softwood kraft and the mercerized cellulose pulp has a TAPPI 230 om-89 viscosity of at most 12 cP. This method, however, may be applied to all cellulose pulps, regardless of their viscosities, including those which, when mercerized, have a viscosity greater than 12 cP. The mercerized cellulose pulp is typically substantially free of cellulose III. Mercerized cellulose pulp prepared by this method has a greater percentage of crystalline cellulose II and a smaller crystalline area than that of non-mercerized cellulose pulp. The present invention also provides a method of preparing a cellulose floc comprising the steps of (a) obtaining mercerized and recovered cellulose pulp, and (b) treating the mercerized pulp to form the cellulose floc. Alternatively, the method comprises mercerizing and recovering a cellulose floc. Cellulose floc prepared by this method have a greater bulk density than cellulose floc prepared from similar non-mercerized cellulose pulp. Furthermore, the bulk density gain is greater than that expected from the coarseness (weight per unit of fiber length) gain from preparing a cellulose floc.

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