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1. 发明申请

US20040112555A1 Bleaching stage using xylanase with hydrogen peroxide, peracids, or a combination thereof 审中-公开
标题翻译：漂白阶段使用木聚糖酶与过氧化氢，过酸或其组合
公开(公告)号：US20040112555A1
公开(公告)日：2004-06-17
申请号：US10470953
申请日：2004-02-02
发明人： Jeffrey Tolan , Miro Suchy
IPC分类号： D21C009/12 , D21C009/14 , D21C009/147 , D21C009/16
CPC分类号： D21C9/16 , D21C5/005 , D21C9/1057 , D21C9/14 , D21C9/153
摘要： The present invention discloses methods of bleaching chemical pulp that combine xylanase enzymes with hydrogen peroxide, peracids, or a mixture. The method comprises the steps of carrying out a chemical pulping operation, optionally followed by delignifying the pulp with oxygen, then combining xylanase enzymes with hydrogen peroxide, peracids, or a mixture to bleach the pulp. The method allows the mill to use both xylanase and peracids in a single bleaching tower to decrease the usage of chlorine dioxide and other bleaching chemicals. The pulp bleaching method of the present invention may be performed in a pulp mill as part of a complex pulp bleaching process.
摘要翻译：本发明公开了将木聚糖酶与过氧化氢，过酸或混合物结合的漂白化学纸浆的方法。该方法包括进行化学制浆操作的步骤，任选地随后用氧脱木质纸浆，然后将木聚糖酶与过氧化氢，过酸或混合物混合以漂白纸浆。该方法允许研磨机在单个漂白塔中使用木聚糖酶和过酸，以减少二氧化氯和其它漂白化学品的用量。本发明的纸浆漂白方法可以在纸浆厂中进行，作为复杂纸浆漂白方法的一部分。

2. 发明申请

US20010004005A1 ACID TREATMENT OF PULP AT HIGH TEMPERATURE PRIOR RO CHRLORINE DIOXIDE BLEACHING 失效
公开(公告)号：US20010004005A1
公开(公告)日：2001-06-21
申请号：US09051678
申请日：1998-04-14
发明人： KAJ O. HENRICSON
IPC分类号： D21C009/147
CPC分类号： D21C9/1005 , D21C9/1026
摘要： In the treatment of cellulose pulp in connection with bleaching, the pulp is first cooked and, if necessary, oxygen delignified in order to reduce the Kappa number below 24, preferably below 14, and after that the pulp is treated in an acid stage at a pH of 2-5 and at a temperature range of 75-130null C. in order to reduce the Kappa number by 2-9 units. To prevent essential weakening of the strength properties of the pulp in the acid stage treatment tower, the retention time, t min, is 30 to 300 minutes and the treatment temperature, T 0null C. is Tmin

3. 发明申请

US20040154761A1 Methods to enhance pulp bleaching and delignification 审中-公开
标题翻译：增强纸浆漂白和脱木质素的方法
公开(公告)号：US20040154761A1
公开(公告)日：2004-08-12
申请号：US10774278
申请日：2004-02-06
发明人： Prasad Y. Duggirala , Sergey M. Shevchenko , Kristine S. Salmen
IPC分类号： D21B001/16 , D21C003/20 , D21C009/147
CPC分类号： D21C9/1042 , D21C3/22 , D21C9/147
摘要： A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and claimed.
摘要翻译：描述并要求保护包括添加有机硫化物螯合剂的化学和机械纸浆中的亮度提高方法。还描述并要求保护增加化学纸浆中脱木质素的方法，包括加入有机硫化物螯合剂。

4. 发明申请

US20030183351A1 Use of thinnings and other low specific gravity wood for lyocell pulps method 有权
标题翻译：使用薄膜和其他低比重木材做lyocell纸浆法
公开(公告)号：US20030183351A1
公开(公告)日：2003-10-02
申请号：US10336365
申请日：2003-01-02
发明人： James E. Sealey II , W. Harvey Persinger JR. , Kent Robarge , Mengkui Luo
IPC分类号： D21C003/02 , D21C003/26 , D21C009/147 , D21C009/14
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。

5. 发明申请

US20030178163A1 Two-stage chlorine bleaching process with filtrate recirculation 失效
标题翻译：两步氯漂洗过程与滤液再循环
公开(公告)号：US20030178163A1
公开(公告)日：2003-09-25
申请号：US10344425
申请日：2003-02-12
发明人： Lars-Ake Lindstrom , Solveig Norden , Gunnar Carre
IPC分类号： D21C003/18 , D21C003/26 , D21C009/12 , D21C009/14 , D21C009/147 , D21C009/16
CPC分类号： D21C9/144
摘要： A method of bleaching chemical pulp, comprising two bleaching stages (D0 and, respectively, D1) with chlorine dioxide as dominating bleaching chemical and at least one intermediate alkaline bleaching stage (E). The ingoing pulp is dewatered to a concentration of 25-40% before the first chlorine dioxide stage (D0) and to 10-40% after the second chlorine dioxide stage (D1). Filtrate from the dewatering after the second chlorine dioxide stage (D1) is re-cycled and utilized for controlling the pulp concentration to 8-15% of the dewatered pulp to the first chlorine dioxide stage (D0).
摘要翻译：一种漂白化学纸浆的方法，包括二氧化氯作为主要漂白化学品和至少一个中间碱性漂白阶段（E）的两个漂白阶段（D0和D1）。进料纸浆在第一个二氧化氯阶段（D0）之前脱水至25-40％的浓度，在第二个二氧化氯阶段（D1）之后脱水至10-40％。在第二次二氧化氯阶段（D1）之后从脱水中滤出的滤液被重新循环，并用于将纸浆浓度控制在脱水纸浆到第一个二氧化氯阶段（D0）的8-15％。

6. 发明申请

US20030155086A1 Process for bleaching a lignocellulosic pulp 审中-公开
标题翻译：漂白木质纤维素纸浆的方法
公开(公告)号：US20030155086A1
公开(公告)日：2003-08-21
申请号：US10240697
申请日：2003-03-03
发明人： Krister Sjoblom , Malena Rennel
IPC分类号： D21C005/02 , D21C009/14 , D21C009/147
CPC分类号： D21C9/14 , D21C9/1036
摘要： The invention relates to improvements in the bleaching of a lignocellulosic pulp by adding carbon dioxide to provide a beneficial pH profile in the chlorine dioxide bleaching or delignification. The resulting bleached pulp is used in the production of paper or pulp. The invention also relates to the use of carbon dioxide for providing a desired pH profile in a chlorine dioxide bleaching stage.
摘要翻译：本发明涉及通过添加二氧化碳来提高木质纤维素纸浆的漂白以在二氧化氯漂白或脱木质素中提供有益的pH分布的改进。所得到的漂白纸浆用于纸或纸浆的生产。本发明还涉及二氧化碳在二氧化氯漂白阶段中提供所需pH曲线的用途。

7. 发明申请

US20010035272A1 Method for oxygen delignification of a digested pulp 失效
公开(公告)号：US20010035272A1
公开(公告)日：2001-11-01
申请号：US09886913
申请日：2001-06-21
发明人： Monica Bokstrom , Pia Mellander , Solveig Norden
IPC分类号： D21C009/147
CPC分类号： D21C9/147
摘要： Methods for oxygen delignification of a pulp are disclosed, including initially delignifying the pulp at a delignification temperature of less than 90null C., adding oxygen to the pulp so that the oxygen is present during the initial delignification step, and further delignifying the pulp at a delignification temperature of greater than 90null C., the difference between the two delignification temperatures being less than about 20null C., and the pressure being greater in the initial delignification step. The method also includes adding alkali solely to the initial delignification step in order to obtain high alkalinity therein.

8. 发明申请

US20040200589A1 Method of making pulp having high hemicellulose content 审中-公开
标题翻译：制造具有高半纤维素含量的纸浆的方法
公开(公告)号：US20040200589A1
公开(公告)日：2004-10-14
申请号：US10409762
申请日：2003-04-08
发明人： William J. Herring , David B. Jack , Grant R. Bourree
IPC分类号： D21C003/20 , D21C009/14 , D21C009/147
CPC分类号： D21C3/222 , D21C3/02 , D21C9/14 , D21C9/147 , D21C9/16 , D21H11/10 , D21H27/10
摘要： Bleached, Kraft chemical pulp having increased hemicellulose content compared to conventional Kraft chemical pulps. In one embodiment, the pulp has a hemicellulose content greater than about 17 weight percent as measured by the 18% caustic solubility test. In another aspect, a method for making wood cellulose pulp having increased hemicellulose content compared to conventional Kraft chemical pulps. In the method, a lignocellulosic material is pulped in caustic sulfide to provide a first brownstock, which is treated with oxygen to provide a second brownstock, which is then bleached to provide the pulp product.
摘要翻译：与常规牛皮纸化学纸浆相比，漂白的牛皮纸化学纸浆具有增加的半纤维素含量。在一个实施方案中，纸浆的半纤维素含量大于约17重量％，通过18％苛性碱溶解度测试测得。另一方面，与常规牛皮纸化学纸浆相比，制备木质纤维素纸浆的方法具有增加的半纤维素含量。在该方法中，将木质纤维素材料在苛性硫化物中制浆以提供第一个粗粉，其用氧气处理以提供第二个粗浆，然后将其漂白以提供纸浆产物。

9. 发明申请

US20040084161A1 Method for the production of fiber pulp 审中-公开
标题翻译：生产纤维纸浆的方法
公开(公告)号：US20040084161A1
公开(公告)日：2004-05-06
申请号：US10691276
申请日：2003-10-22
发明人： Helmut Heinzmann
IPC分类号： D21C003/18 , D21C009/12 , D21C009/14 , D21C009/147 , D21C009/16
CPC分类号： C08L1/02 , D21C9/004
摘要： In a method for the production of fiber pulp for subsequent use in the production of a fiber web, especially a paper or cardboard web, the fiber pulp that was produced in a pulp production process is first loaded with an additive by way of a chemical precipitation reaction. The loaded pulp is then dried and available for subsequent utilization or formulated into a suitable form for shipment.
摘要翻译：在用于生产纤维纸浆以后用于生产纤维网，特别是纸或纸板幅材的纤维纸浆的方法中，在纸浆生产过程中生产的纤维纸浆首先通过化学沉淀物加载添加剂反应。然后将装载的纸浆干燥并可用于随后的使用或配制成合适的形式用于装运。

10. 发明申请

US20020088571A1 Method and apparatus for treating pulp 审中-公开
标题翻译：纸浆处理方法和设备
公开(公告)号：US20020088571A1
公开(公告)日：2002-07-11
申请号：US09860771
申请日：2001-05-21
发明人： Pekka Tervola , Janne Vehmaa
IPC分类号： D21C009/147
CPC分类号： D21C9/147
摘要： The present invention relates to a method of and apparatus for treating pulp. More precisely, the present invention relates to a method and apparatus for treating pulp with oxygen. Especially preferably the method and apparatus according to the invention relate to oxygen delignification of chemical pulp, i.e. so-called oxygen bleaching. A characterizing feature of the method according to the invention of treating chemical pulp in an oxygen bleaching stage where the pulp is bleached in at least one pressurized reactor in the presence of alkali is that the whole oxygen stage is effected pressurized and that a bigger amount of alkali than conventional is fed in the beginning of the oxygen stage and that the whole alkali dose is fed in the beginning of the oxygen stage.
摘要翻译：本发明涉及一种处理纸浆的方法和设备。更准确地说，本发明涉及一种用氧处理纸浆的方法和装置。特别优选根据本发明的方法和装置涉及化学纸浆的氧脱木质素，即所谓的氧漂白。根据本发明的处理化学纸浆的方法的特征在于在碱性存在下在至少一个加压反应器中漂白纸浆的氧漂白阶段中处理化学纸浆的特征是，整个氧气阶段被加压，并且更大量的在氧阶段开始时加入比常规的碱，并且在氧气阶段开始时供给全部碱剂量。

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