公开(公告)号：US06797113B2

公开(公告)日：2004-09-28

申请号：US10336365

申请日：2003-01-02

申请人： James E. Sealey, II ,  W. Harvey Persinger, Jr. ,  Kent Robarge ,  Mengkui Luo

发明人： James E. Sealey, II ,  W. Harvey Persinger, Jr. ,  Kent Robarge ,  Mengkui Luo

IPC分类号： D21C302

CPC分类号： C08B1/00 ,  D01D5/098 ,  D01D5/18 ,  D01F2/00 ,  D21C3/02 ,  D21C9/004 ,  D21C9/10 ,  Y10T428/2904 ,  Y10T428/2965

摘要： The use of low specific gravity wood from thinning operations, for example, will produce a lower brownstock viscosity for a given kappa number target. A differential of 200-cP falling ball pulp viscosity has been detected from Kraft cooks of low and high specific gravity wood. Using low specific gravity wood can reduce the bleach stage temperature and the chemical dose needed in the bleach plant to produce lyocell pulp specifications. Low specific gravity wood also increases the ability to reduce pulp viscosity to very low levels without increasing the copper number of the pulp or the concentration of carbonyl in the pulp above acceptable levels.

摘要翻译： 例如，对于给定的卡贝数目标，使用来自变薄操作的低比重木材将产生较低的棕色粘度。 从低比重木材和高比重木材的牛皮纸煮熟中检测到200-cP落球纸粘度的差异。 使用低比重木材可以减少漂白阶段的温度和漂白工厂所需的化学剂量来生产莱赛克纸浆规格。 低比重木材还增加了将纸浆粘度降低至非常低水平而不增加纸浆的铜数或纸浆中羰基浓度高于可接受水平的能力。

公开(公告)号：US06635147B1

公开(公告)日：2003-10-21

申请号：US09571297

申请日：2000-05-14

申请人： Wu-hwa Wesley Hsu

发明人： Wu-hwa Wesley Hsu

IPC分类号： D21C302

CPC分类号： G01N33/343 ,  D21C7/12 ,  G01N31/164

摘要： Chemical species (e.g., metaborate, carbonate, hydroxide and sulfide) in a boron-containing alkaline wood pulping liquor sample are determined quantitatively by (i) subjecting a first aliquot portion of the sample to a primary acid titration analysis to derive multiple equivalence points at different respective pH values; (ii) subjecting a second aliquot portion of the sample to an analysis to determine the quantitative presence of boron or sulfide ions therein, and then (iii) determining the quantitative presence in the sample of at least one of the chemical species. Wood pulping parameters may thus be determined on the basis of the quantitative presence of the chemical species to assist in process and/or quality control of the wood pulping operation. For example, the sample may be analyzed for boron content using calorimeter or atomic spectroscopy and/or analyzed for sulfide ion content using a secondary silver sulfide precipitation titration analysis, each of which may be conducted substantially simultaneously with the primary acid titration analysis.

摘要翻译： 通过以下步骤定量测定含硼碱性木材制浆液样品中的化学物质（例如偏硼酸盐，碳酸盐，氢氧化物和硫化物）：（i）使样品的第一等分试样部分进行初级酸滴定分析，以得出多个等效点 不同的各自的pH值; （ii）使样品的第二等分试样部分进行分析以确定其中的硼或硫化物离子的定量存在，然后（iii）确定样品中至少一种化学物质的定量存在。 因此可以基于化学物质的定量存在来确定木材制浆参数，以辅助木材制浆操作的过程和/或质量控制。 例如，可以使用量热计或原子光谱分析样品的硼含量和/或使用二次硫化银沉淀滴定分析来分析硫化物离子含量，其中每一个可以与初级酸滴定分析基本上同时进行。

公开(公告)号：US06613192B1

公开(公告)日：2003-09-02

申请号：US09646256

申请日：2000-11-28

申请人： Pratima Bajpai ,  Pramod K. Bajpai ,  Masood Akhtar

发明人： Pratima Bajpai ,  Pramod K. Bajpai ,  Masood Akhtar

IPC分类号： D21C302

CPC分类号： D21C1/00 ,  D21C3/02 ,  D21C5/005

摘要： A method for producing paper pulp for use in the making of paper from eucalyptus wood chips. The method comprises inoculating wood chips with white rot fungi, fermenting the wood chips so as to cause a propagation of the fungus through the wood chips and allowing the fungus to modify the lignin, and pulping the degraded wood chips by a kraft process.

摘要翻译： 一种生产用于从桉木木片制造纸的纸浆的方法。 该方法包括用白腐真菌接种木屑，发酵木片，使真菌通过木片繁殖，并允许真菌修饰木质素，并通过硫酸盐法制浆降解木片。

公开(公告)号：US06464827B1

公开(公告)日：2002-10-15

申请号：US09722435

申请日：2000-11-28

申请人： Jorge Luiz Colodette

发明人： Jorge Luiz Colodette

IPC分类号： D21C302

CPC分类号： D21C3/022 ,  D21C3/04

摘要： A method for producing pulp, comprising digesting lignocellulosic wood, containing one or more xylan derivatives selected from the group consisting of xylan bound with lignin, xylan bound with hexenuronic acid, and mixtures thereof, with an aqueous alkaline pulping solution containing sulfide and having an initial free hydroxyl ion concentration of at least 1 mole per liter, under conditions whereunder xylan is dissociated from said one or more xylan derivatives and the pH of the solution remains above 12.5; and then while the pH of said solution is above 12.5, adding a sufficient amount of an acidic agent to said pulping solution to precipitate dissociated xylan from said pulping solution while minimizing precipitation of lignin from said pulping solution. Carbon dioxide is a preferred acidic agent.

摘要翻译： 一种用于生产纸浆的方法，包括消化木质纤维素木材，其含有一种或多种选自木质素结合的木聚糖，与己烯壬醛结合的木聚糖及其混合物的木聚糖衍生物与含硫化物的碱性制浆溶液并具有初始 游离羟基离子浓度至少为1摩尔/升，在木聚糖从所述一种或多种木聚糖衍生物解离的条件下，溶液的pH保持在12.5以上; 然后当所述溶液的pH高于12.5时，向所述制浆溶液中加入足够量的酸性试剂以从所述制浆液中沉淀离解的木聚糖，同时使来自所述制浆溶液的木质素沉淀最小化。 二氧化碳是优选的酸性剂。

公开(公告)号：US06752902B2

公开(公告)日：2004-06-22

申请号：US10046967

申请日：2002-01-14

申请人： Heikki Heikkilä ,  Mirja Lindroos ,  Jorma Sundquist ,  Seppo Kauliomäki ,  Raimo Rasimus

发明人： Heikki Heikkilä ,  Mirja Lindroos ,  Jorma Sundquist ,  Seppo Kauliomäki ,  Raimo Rasimus

IPC分类号： D21C302

CPC分类号： C13K13/002 ,  D21C3/02 ,  D21C9/002 ,  D21C11/0007

摘要： The invention relates to a method of preparing chemical pulp and xylose by the use of alkaline or neutral cooking and post hydrolysis of the pulp by performing the post hydrolysis directly on the pulp by means of acid treatment. In the method of the invention, the xylan in the pulp is utilized as completely as possible, resulting in a good xylose yield and, simultaneously, acceptable characteristics for the pulp.

摘要翻译： 本发明涉及一种通过碱处理或中性烹调来制备化学纸浆和木糖的方法，并且通过酸处理在纸浆上直接进行后水解来制备纸浆。 在本发明的方法中，纸浆中的木聚糖尽可能完全地被利用，从而产生良好的木糖产率，同时对纸浆具有可接受的特性。

公开(公告)号：US06468390B1

公开(公告)日：2002-10-22

申请号：US09139209

申请日：1998-08-24

申请人： Vidar Martin Snekkenes ,  Krister Karl Erik Olsson ,  Bror Lennart Gustavsson ,  Ernst Mikael Lindström

发明人： Vidar Martin Snekkenes ,  Krister Karl Erik Olsson ,  Bror Lennart Gustavsson ,  Ernst Mikael Lindström

IPC分类号： D21C302

CPC分类号： D21C3/22 ,  D21C3/02 ,  D21C3/24 ,  D21C3/26 ,  D21C9/005

摘要： A method for continuous cooking of lignocellulosic fiber material, comprising the steps of sequentially (a) in a first stage, impregnating the fiber material in an impregnation liquid comprising alkali metal hydroxide, and thereafter withdrawing (14, 514) a spent impregnation liquid; (b) in a second stage, cooking the fiber material in a cooking liquor comprising alkali metal hydroxide; and (c) in a third stage, adding (A), to said fiber material, a liquid which is rich in hemicellulose, said liquid preferably comprising at least a part (14a, 514a) of said withdrawn spent impregnation liquid. In a fourth stage (d), the fiber material is cooked in a cooking liquor comprising the liquid added in the third stage, whereby the fiber material is subjected to a retention time of at least 1 hour in said fourth stage.

摘要翻译： 一种用于连续烹饪木质纤维素纤维材料的方法，包括以下步骤：（a）在第一阶段中，将纤维材料浸渍在包含碱​​金属氢氧化物的浸渍液体中，然后抽出（14,514）废弃的浸渍液体; （b）在第二阶段中，在包含碱金属氢氧化物的蒸煮液中烹饪纤维材料; 和（c）在第三阶段中，向所述纤维材料添加富含半纤维素的液体（A），所述液体优选包含所述抽出的废浸渍液体的至少一部分（14a，514a）。 在第四阶段（d）中，纤维材料在包含在第三阶段中加入的液体的蒸煮液中烹调，由此纤维材料在所述第四阶段中经历至少1小时的保留时间。