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    METHOD FOR THE PREPARATION OF CELLULOSE ETHERS WITH A HIGH SOLIDS PROCESS, PRODUCT OBTAINED AND USES OF THE PRODUCT
    3.
    发明申请
    METHOD FOR THE PREPARATION OF CELLULOSE ETHERS WITH A HIGH SOLIDS PROCESS, PRODUCT OBTAINED AND USES OF THE PRODUCT 审中-公开
    用高固体工艺制备纤维素的方法，产品获得和使用产品

    公开(公告)号：US20150094464A1

    公开(公告)日：2015-04-02

    申请号：US14390519

    申请日：2013-04-04

    Applicant: Stora Enso OYJ

    Inventor： Heidi Saxell ,  Isto Heiskanen ,  Lars Axrup ,  Cecilia Land Hensdal ,  Veikko Jokela

    IPC: C08B11/12

    CPC classification number: C08B11/12 ,  C08B1/08

    Abstract: The present invention provides a method for production of cellulose ethers in a high solids process substantially without use of organic solvents as reaction and/or washing medium. In the method of the invention the first alkalization step is carried out by using high solids content cellulose pulp and solid sodium hydroxide. This is followed by an etherification step where the solids content is preferably further increased and the use of solid etherification reactant is preferred. As no organic solvents are used as reaction media the invented method enables production of cellulose ethers directly from never dried pulp with significant savings in energy and investment costs. The method is especially suitable for the production of carboxymethyl cellulose sodium salt (CMC) with low degree of substitution (DS

    Abstract translation: 本发明提供了一种基本上不使用有机溶剂作为反应和/或洗涤介质的高固含量方法生产纤维素醚的方法。 在本发明的方法中，通过使用高固含量的纤维素纸浆和固体氢氧化钠来进行第一碱化步骤。 之后是醚化步骤，其中固体含量优选进一步增加，并且优选使用固体醚化反应物。 由于不使用有机溶剂作为反应介质，本发明的方法可以直接从未干燥的纸浆生产纤维素醚，从而显着节省能源和投资成本。 该方法特别适用于低取代度（DS <0.3）的羧甲基纤维素钠盐（CMC）的生产。 所得到的无水或低水溶性羧甲基化纤维素纤维的使用适用于例如用于生产微纤化纤维素。

    Method of producing microfibrillated cellulose
    4.
    发明授权
    Method of producing microfibrillated cellulose 有权

    公开(公告)号：US10240288B2

    公开(公告)日：2019-03-26

    申请号：US14758708

    申请日：2013-12-30

    Applicant: Stora Enso OYJ

    Inventor： Isto Heiskanen ,  Henri Kastinen ,  Anna Kauppi ,  Jukka Kankkunen ,  Lars Axrup ,  Cecilia Land Hensdal ,  Heidi Saxell ,  Kaj Backfolk

    IPC: D21C9/00 ,  D21H11/18 ,  D21H17/00 ,  D21H11/04 ,  C08B15/08 ,  C08L1/04 ,  D21D1/20

    Abstract: The invention relates to methods of producing microfibrillated cellulose (MFC). According to the invention a fibrous pulp suspension is fibrillated mechanically at a consistency of less than 12.5%, dewatered to raise the consistency of the fibrillated suspension to at least 12.5%, and then subjected in the dewatered condition to further fibrillation. Alternatively an initially fibrillated fibrous pulp suspension may be dewatered and fibrillated in the dewatered condition, after which these dewatering and fibrillating steps are repeated one or more times so that pulp consistency is increased for each fibrillation step. The goals of raising the consistency between subsequent fibrillations are energy saving and an increased aspect ratio in MFC. The invention even comprises uses of the MFC product, e.g. as an additive for papermaking furnish or injection molded plastic composites.

    METHOD FOR MAKING CELLULOSE CARBAMATE
    5.
    发明申请
    METHOD FOR MAKING CELLULOSE CARBAMATE 审中-公开

    公开(公告)号：US20170145119A1

    公开(公告)日：2017-05-25

    申请号：US15321345

    申请日：2015-06-23

    Applicant: Stora Enso OYJ

    Inventor： Heidi Saxell ,  Paula Rantamäki ,  Kalle Ekman

    IPC: C08B15/06

    CPC classification number: C08B15/06 ,  D01F1/10 ,  D01F2/24

    Abstract: The present invention relates to a method for manufacturing cellulose carbamate which method comprises the following steps: providing a never-dried pulp, adding urea and mixing said pulp with said urea, mechanically treating said mixture, drying the mixture, and heating the relatively dry mixture thus providing a cellulose carbamate. The present invention also relates to a cellulose carbamate obtainable by said method, use of said cellulose carbamate and a dope comprising said cellulose carbamate.

    A METHOD OF PRODUCING OXIDIZED OR MICROFIBRILLATED CELLULOSE
    7.
    发明申请
    A METHOD OF PRODUCING OXIDIZED OR MICROFIBRILLATED CELLULOSE 审中-公开
    生产氧化或微晶纤维素的方法

    公开(公告)号：US20160153144A1

    公开(公告)日：2016-06-02

    申请号：US14905463

    申请日：2014-07-11

    Applicant: STORA ENSO OYJ

    Inventor： Jaakko Hiltunen ,  Isto Heiskanen ,  Heidi Saxell ,  Jukka Kahelin ,  Erkki Saharinen

    IPC: D21H11/20 ,  C08B15/02 ,  D21C9/00

    Abstract: The invention relates to a method of producing oxidized or microfibrillated cellulose (MFC). According to the invention there is provided an aqueous pulp suspension with a consistency of at least 15%, and at least one oxidant is added to the suspension to oxidize cellulosic hydroxyl groups in the suspension under mechanical mixing or shearing. The oxidized suspension, washed and diluted to a lower consistency, is subjected to homogenization to yield gel-like MFC. Alkali hypochlorite may be used as oxidant, and preferred mediating oxidation catalysts are AZADO and TEMPO. Alkali bromide may be used as a cocatalyst. The MFC product, which as a suspension has an increased viscosity, is suitable as a means of regulating viscosity or for production of films and composites.

    Abstract translation: 本发明涉及一种生产氧化或微纤化纤维素（MFC）的方法。 根据本发明，提供了至少15％的稠度的水性纸浆悬浮液，并且在悬浮液中加入至少一种氧化剂以在机械混合或剪切下氧化悬浮液中的纤维素羟基。 将氧化悬浮液洗涤并稀释至较低浓度，进行均化，得到凝胶状MFC。 碱性次氯酸盐可以用作氧化剂，优选的介质氧化催化剂是AZADO和TEMPO。 碱性溴化物可用作助催化剂。 作为悬浮液具有增加的粘度的MFC产品适合作为调节粘度或用于生产膜和复合材料的手段。

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