Un método y un sistema para aislar xilano de material vegetal, así como xilano, carbonato de calcio y fibra de celulosa

    公开(公告)号:ES2703048T3

    公开(公告)日:2019-03-06

    申请号:ES13768365

    申请日:2013-03-26

    Abstract: Un método para aislar el xilano del material vegetal, en donde se utilizan fibras de celulosa que contienen xilano, ventajosamente, fibras de celulosa de madera dura, y en donde dicho método comprende lo siguiente, en el orden detallado a continuación: - extraer (20) xilano de dichas fibras de celulosa por medio de hidróxido de sodio, para formar una solución del extracto (17) que contiene xilano, - retirar las fibras de celulosa de dicha mezcla que comprende fibras de celulosa y solución del extracto (17), para aislar dicha solución del extracto (17) de dicha mezcla, - añadir dióxido de carbono (14) a dicha solución del extracto (17) para hacer precipitar el xilano, por lo que se forman un abrillantador líquido (18) y xilano precipitado (12), - separar dicho abrillantador (18) de la mezcla, para aislar el xilano de dicha mezcla, - añadir hidróxido de calcio (16) a dicho abrillantador (18), para formar carbonato de calcio precipitado e hidróxido de sodio líquido (15), y - retirar el hidróxido de sodio de dicha mezcla que contiene hidróxido de sodio y carbonato de calcio precipitado, para aislar el carbonato de calcio de dicha mezcla.

    METHODS FOR MAKING PAPER OR BOARD, A BOARD TRAY AND PULP PARTICLES COATED WITH FOAMABLE POLYMER FOR USE IN THE SAME

    公开(公告)号:CA3009875A1

    公开(公告)日:2017-08-17

    申请号:CA3009875

    申请日:2017-02-06

    Applicant: STORA ENSO OYJ

    Abstract: The invention concerns a method of manufacturing paper or board, the paper or board obtained by the method, and a method of producing a tray from the board. In a fibrous stock for papermaking is incorporated an amount of polymer coated fibrous particles, which even have a foaming agent such as moisture contained therein. A web is formed from the fibrous stock on a forming fabric of a paper or board machine, followed by pressing and drying to a finished paper or board. As the paper or board is sufficiently heated the foaming agent within the particles evaporates, causing expansion and foaming of the polymer coating, which adds to malleability of the board as it is moulded into a shaped article such as a board tray. The invention even covers production of doubly coated fibrous particles for use in said methods, the inner coating layer being of a foamable polymer with a higher melt flow rate and the outer coating layer being of a non-foaming polymer of a lower melt flow rate.

    A METHOD FOR MANUFACTURING PAPER PULP, AND PAPER PULP
    8.
    发明申请
    A METHOD FOR MANUFACTURING PAPER PULP, AND PAPER PULP 审中-公开
    制造纸浆和纸浆的方法

    公开(公告)号:WO2012136887A3

    公开(公告)日:2012-12-06

    申请号:PCT/FI2012050324

    申请日:2012-03-30

    CPC classification number: D21C9/002 D21C9/004 D21H17/675 D21H17/70

    Abstract: The invention relates to a method for manufacturing paper pulp (10), in which method bleached, chemically pulped cellulose fibres (1) from hardwood are used as raw material. The method comprises extracting (5) xylan from said cellulose fibres (1) by means of sodium hydroxide; adding carbon dioxide into a mixture (2) containing said cellulose fibres (1), dissolved xylan and sodium hydroxide, for precipitating xylan; adding calcium hydroxide into said mixture containing precipitated xylan and cellulose fibres, for forming precipitated calcium carbonate (7); and removing sodium hydroxide from said mixture (4) containing sodium hydroxide, xylan, cellulose fibres (1), and calcium carbonate. Furthermore, the invention relates to paper pulp made by the method.

    Abstract translation: 本发明涉及一种用于制造纸浆(10)的方法,其中将漂白的化学制浆的纤维素纤维(1)从硬木中用作原料。 该方法包括用氢氧化钠从所述纤维素纤维(1)提取(5)木聚糖; 将二氧化碳加入到含有所述纤维素纤维(1),溶解的木聚糖和氢氧化钠的混合物(2)中以沉淀木聚糖; 在含有沉淀的木聚糖和纤维素纤维的混合物中加入氢氧化钙,形成沉淀的碳酸钙(7); 并从含有氢氧化钠,木聚糖,纤维素纤维(1)和碳酸钙的混合物(4)中除去氢氧化钠。 此外,本发明涉及通过该方法制造的纸浆。

    A METHOD AND A SYSTEM FOR ISOLATING XYLAN FROM PLANT MATERIAL, AS WELL AS XYLAN, CALCIUM CARBONATE, AND CELLULOSE FIBRE

    公开(公告)号:CA2873716C

    公开(公告)日:2017-01-03

    申请号:CA2873716

    申请日:2013-03-26

    Applicant: STORA ENSO OYJ

    Abstract: The invention relates to a method for isolating xylan from plant material. In the method, cellulose fibres which contain xylan are used, advantageously cellulose fibres from hardwood; and xylan is extracted (20) from said cellulose fibres by means of sodium hydroxide for forming an extract solution (17) that contains xylan; cellulose fibres are removed from said mixture that contains cellulose fibres and extract solution (17), for isolating said extract solution from said mixture; carbon dioxide (14) is added to said extract solution (17) for isolating xylan, wherein liquid brightener (18) and precipitated xylan (12) are formed; calcium hydroxide (16) is added to said isolated brightener (18), for forming precipitated calcium carbonate and liquid sodium hydroxide (15); and sodium hydroxide is removed from said mixture that contains sodium hydroxide and precipitated calcium carbonate, for isolating calcium carbonate from said mixture. Furthermore, the invention relates to a system for isolating xylan from plant material, and to xylan, calcium carbonate, cellulose fibre and use of xylan.

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