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首页> 外文会议>TAPPI PEERS Conference >Chemical, anatomical and technology aspects, for Eucalyptus benthamii x Eucalyptus dunnii for use in pulp and paper mill
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Chemical, anatomical and technology aspects, for Eucalyptus benthamii x Eucalyptus dunnii for use in pulp and paper mill

机译：化学，解剖学和技术方面，用于制浆造纸厂的本氏桉x邓肯桉

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The chemical, anatomical and technological aspects of pulp made from Eucalyptus benthamii was compared with Eucalyptus dunnii pulp for paper production. Samples of E. benthamii chips were obtained and analyzed for basic density, lignin (acid-soluble, acid insoluble and total), extractives, carbohydrates (glycans, xylans, galactans, mannans and arabinans), uronic acids, higher heating value and trace elemental analysis , M0E, metals content (silica , Na, K, Ca, Mn, Mg, K, Cl, Na and Cu) and particle size classification . The chips were Kraft cooked using conditions that produced a 70 ± 5 kappa number. The pulps were analyzed and characterized by kappa number, yield, viscosity and fiber dimensions (length, width, lumen diameter and wall thickness of the fibers, fiber coarseness, fiber count /gram). Black liquor from the pulping process was analyzed for per cent solids, organics, inorganics, Na_2S, NaOH and Na_2CO_3. The pulp was refined to 5 different levels in a valley beater employing 5 minute intervals between 1 and 20 minutes. For each level of refining, Canadian Standard Freeness was determined and 120 g/m~2 handsheets were made. The handsheets were conditioned and tested for: Compressive strength (STFI - SCT, RCT, CMT), tear resistance (Elmendorf) and tensile strength. The severe frost resistance of E. benthamii Maiden et Cambage has created significant interest in colder regions which desire improved forest productivity. The results of this study showed differences in delignification between the two woods and showed lower pulp yield for E. benthamii; possibly associated with differences in chemical composition. The E. benthamii studied in this work exhibited higher amounts of lignin, extractives, lower carbohydrate content, lower specific gravity and shorter fiber length. The lignin, extractives and carbohydrates directly influence the alkali consumption, yield and production potential. However, cooking a blend of the two woods showed good results in both pulping and in physical and mechanical pulp properties.
机译：比较了本特桉纸浆和邓尼桉纸浆生产纸浆的化学，解剖学和工艺方面。获得了本氏木霉芯片的样品，并对其基本密度，木质素（酸溶性，酸不溶性和总含量），提取物，碳水化合物（聚糖，木聚糖，半乳聚糖，甘露聚糖和阿拉伯聚糖），糖醛酸，较高的热值和微量元素进行了分析。分析，M0E，金属含量（二氧化硅，Na，K，Ca，Mn，Mg，K，Cl，Na和Cu）和粒度分类。使用产生70±5卡伯值的条件对木片进行牛皮纸烹饪。分析纸浆并通过卡伯值，产率，粘度和纤维尺寸（长度，宽度，管腔直径和纤维壁厚，纤维粗度，纤维支数/克）进行表征。制浆过程中的黑液分析了固体，有机物，无机物，Na_2S，NaOH和Na_2CO_3的百分比。纸浆在打谷机中采用1至20分钟之间的5分钟间隔将其精炼成5种不同的水平。对于每个精炼水平，确定加拿大标准游离度，并制成120 g / m〜2手抄纸。对手抄纸进行调理并测试以下各项：抗压强度（STFI-SCT，RCT，CMT），抗撕裂性（Elmendorf）和拉伸强度。 E. benthamii Maiden et Cambage的严峻抗冻性引起了对寒冷地区的极大兴趣，这些地区希望提高森林生产力。这项研究的结果表明，两种木材在去木质素方面存在差异，并且表明本氏肠杆菌的纸浆产量较低。可能与化学成分的差异有关。在这项工作中研究的本氏肠杆菌表现出较高含量的木质素，提取物，较低的碳水化合物含量，较低的比重和较短的纤维长度。木质素，提取物和碳水化合物直接影响碱的消耗，产量和生产潜力。然而，烹饪两种木材的混合物在制浆以及物理和机械纸浆性能方面均显示出良好的结果。

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