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    • 1. 发明申请
    • NEAR-NEUTRAL DEINKING OF RECYCLED PULP USING PHOSPHINES OR PHOSPHONIUM SALTS
    • 使用磷酸盐或磷酸盐盐的回收颗粒的中性去除
    • WO2006089395A1
    • 2006-08-31
    • PCT/CA2006/000165
    • 2006-02-07
    • PULP AND PAPER RESEARCH INSTITUTE OF CANADADORRIS, Gilles M.BEN, YuxiaLAPIERRE, Luc
    • DORRIS, Gilles M.BEN, YuxiaLAPIERRE, Luc
    • D21C5/02D21C9/10
    • D21C5/027Y02W30/648
    • In this process, the conventional alkaline deinking chemistry or the more recent near-neutral sulphite chemistry, both used industrially for processing old newspapers and old magazines is replaced by a bleaching chemical of the phosphine or phosphonium salt-types, effective over a broad range of pH, from acidic to alkaline. In this new application, the bleaching chemical can be added directly in the pulper where it is used in conjunction with nonionic, cationic and/or anionic surfactants, with and without sodium silicate. It can also be added at other points of the deinking process such as the dump chest or in any holding tank or bleaching tower located before or after ink removal steps. It was discovered that this new class of bleaching chemicals was more effective as a bleaching agent than sodium sulphite, currently used in the near-neutral deinking process; however ink fragmentation and redeposition that take place in the pulper at near-neutral conditions and that are aggravated by this new class of compounds preferably have to be minimized otherwise the brightness benefit will be masked. Final brightness of wood-containing fibers approached that obtainable with the conventional alkaline process that uses a mixture of sodium hydroxide, sodium silicate, hydrogen peroxide and surfactants.
    • 在这个过程中,传统的碱性脱墨化学物质或近期近中性的亚硫酸盐化学物质在工业上用于加工旧报纸和旧杂志都被一种磷化氢或鏻盐类型的漂白化学品代替, pH,从酸性到碱性。 在这个新应用中,漂白化学品可直接加入碎浆机中,与非硅酸钠,阳离子和/或阴离子表面活性剂一起使用,有和没有硅酸钠。 也可以在脱墨过程的其他点添加,例如倾倒箱或位于油墨去除步骤之前或之后的任何储存罐或漂白塔中。 据了解,这种新型漂白化学品作为漂白剂比亚硫酸钠更有效,目前用于近中性脱墨工艺; 然而,在近中性条件下在碎浆机中发生的并且由这种新类化合物加重的油墨碎裂和再沉积优选地必须最小化,否则亮度益处将被掩蔽。 含木纤维的最终亮度接近于使用氢氧化钠,硅酸钠,过氧化氢和表面活性剂的混合物的常规碱性方法可获得的。
    • 2. 发明申请
    • HIGH ASPECT RATIO CELLULOSE NANOFILAMENTS AND METHOD FOR THEIR PRODUCTION
    • 高比例纤维素纳米纤维及其生产方法
    • WO2012097446A1
    • 2012-07-26
    • PCT/CA2012/000060
    • 2012-01-19
    • FPINNOVATIONSHUA, XujunLALEG, MakhloufMILES, KeithAMIRI, RezaETTALEB, LahoucineDORRIS, Gilles
    • HUA, XujunLALEG, MakhloufMILES, KeithAMIRI, RezaETTALEB, LahoucineDORRIS, Gilles
    • D21D1/30D01B9/00D21B1/38D21H11/16
    • D21D1/30D21D1/20D21H11/16D21H11/18Y10T428/298
    • A novel method is disclosed to produce on a commercial scale, high aspect ratio cellulose nanofilaments (CNF) from natural lignocellulosic fibers. The method consists of a multi-pass high consistency refining (HCR) of chemical or mechanical fibers using specific combinations of refining intensity and specific energy. The CNF produced by this invention represents a mixture of fine filaments with widths in the submicron and lengths from tens of micrometers to few millimeters. The resultant product is made of a population of free filaments and filaments bound to the fiber core from which they were produced. The proportion of free and bound filaments is governed in large part by total specific energy applied to the pulp in the refiner. These CNF products differ from other cellulose fibrillar materials by their higher aspect ratio and the preserved degree of polymerization (DP) of cellulose. The CNF products made by this invention are excellent additives for the reinforcement of paper, tissue, paperboard and packaging products, plastic composite materials and coating formulations. They display exceptional strengthening power for never-dried paper webs.
    • 公开了一种以商业规模生产来自天然木质纤维素纤维的高纵横比纤维素纳米丝(CNF)的新方法。 该方法由使用精炼强度和比能量的特定组合的化学或机械纤维的多遍高浓度精炼(HCR)组成。 本发明生产的CNF表示亚微米宽度为几十微米至几毫米的细丝的混合物。 所得产物由自由长丝和长丝的群体制成,纤维芯与其生成纤维核。 游离和结合长丝的比例在很大程度上由施加在精炼机中的纸浆的总比能来决定。 这些CNF产品与其它纤维素纤维材料的高宽比和纤维素的保留聚合度(DP)不同。 本发明制备的CNF产品是增强纸张,纸巾,纸板和包装产品,塑料复合材料和涂料配方的优良添加剂。 它们显示出非常干燥的纸幅的强化力。