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    • 7. 发明公开
    • PROCESS FOR PRODUCING MECHANICAL PULP
    • VERFAHREN ZUR HERSTELLUNG VON HOLZSTOFF
    • EP2438235A1
    • 2012-04-11
    • EP10724032.7
    • 2010-05-27
    • Akzo Nobel Chemicals International B.V.
    • HELLSTRÖM, PiaNILSSON, PärWALTER, Karin Susanne MariaJOHANSSON, PatrikWACKERBERG, Eva Linnea ElisabethPAULSSON, Magnus Lars
    • D21C1/08
    • D21C1/08D21C1/04D21C1/06D21C3/222
    • The present invention relates to a process for preparing a high-yield pulp comprising a) treating a lignocellulose containing material chemically by means of an oxidising system comprising at least one non-enzymatic oxidant and an activator and optionally an alkali at a pH from about 2 to about 6.5; and b) treating the lignocellulose containing material mechanically in at least one mechanical treatment stage for a time sufficient to produce a high-yield pulp, wherein the lignocellulose containing material is chemically treated prior to and/or during at least one mechanical treatment stage, wherein the temperature of the lignocellulosic material before, during and/or after at least one mechanical treatment stage of the process ranges from about 45°C to about 200°C for a period of time ranging from about 1 second to about 5 hours and wherein oxidant is present: wherein oxidant is present: (i) after addition of alkali provided alkali is added to the oxidising system and/or (ii) after said at least one mechanical treatment stage.
    • 本发明涉及一种制备高产量纸浆的方法,该方法包括:a)通过包含至少一种非酶催化剂和活化剂的氧化系统和任选的碱在pH值从约2℃下化学处理含木素纤维素的材料 至约6.5; 和b)在至少一个机械处理阶段中将所述含木素纤维素的材料机械处理足以产生高产量纸浆的时间,其中所述含木素纤维素的材料在至少一个机械处理阶段之前和/或期间被化学处理,其中 在该方法的至少一个机械处理阶段之前,期间和/或之后的木质纤维素材料的温度为约45℃至约200℃,时间为约1秒至约5小时,其中氧化剂 存在:其中存在氧化剂:(i)在加入碱后,将碱加入到氧化体系中和/或(ii)所述至少一个机械处理阶段之后。
    • 10. 发明公开
    • LIGNOCELLULOSE PROCESSING
    • 木质纤维素加工
    • EP2694723A1
    • 2014-02-12
    • EP12716644.5
    • 2012-03-29
    • University of Limerick
    • HAVERTY, Donncha
    • D21C1/08D21C3/02D21C3/22D21C9/16
    • D21C1/08D21C3/026D21C3/04D21C3/06D21C3/222D21C9/163
    • A method of transforming a lignocellulose material comprises the steps of: a. combining a lignocellulose material with a solution containing hydrogen peroxide and a hydrogen peroxide stabiliser to produce a mixture that is at least 3% by mass hydrogen peroxide, b. feeding said mixture to the entrance of a continuous reactor concomitant with providing an agent that facilitates the rapid decomposition of the hydrogen peroxide in the solution proximal to the entrance of the reactor so as to cause exothermic, explosive decomposition of the hydrogen peroxide to oxygen and water thus forming a mixture of gas, liquid, and solids and increasing the pressure and temperature in the reactor to at least 15 bar, and 70°C respectively without addition of heat from an external source, c. exiting the mixture of gas, water and solids formed in the reactor through an outlet with a pressure change, into a flash vessel wherein the mixture is separated into a liquid phase containing dissolved or suspended solids and a gas phase substantially rich in oxygen, and d. continuously removing from the flash vessel a gas stream substantially rich in oxygen and a separate heated liquid stream having suspended or dissolved therein chemically and physically altered components of the lignocellulose including a substantially cellulosic material with reduced recalcitrance relative to the starting lignocellulose material.
    • 转化木质纤维素材料的方法包括以下步骤:a。 将木质纤维素材料与含有过氧化氢和过氧化氢稳定剂的溶液混合以产生至少3质量%过氧化氢的混合物,b。 将所述混合物进料到连续反应器的入口,同时提供促进过氧化氢在接近反应器入口的溶液中快速分解的试剂,以引起过氧化氢放热,爆炸性分解成氧和水 从而形成气体,液体和固体的混合物,并且分别将反应器中的压力和温度增加至至少15巴和70℃,而不从外部来源加热,c。 通过压力变化的出口将反应器中形成的气体,水和固体的混合物排出到闪蒸容器中,其中混合物被分离成含有溶解或悬浮的固体和基本上富含氧的气相的液相,d 。 从闪蒸容器中连续地除去基本上富含氧的气流和其中悬浮或溶解有分离的化学和物理改变的木质纤维素组分的单独的加热液体流,所述木质纤维素组分包括相对于起始木质纤维素材料具有降低的不相容性的基本上纤维素材料。