公开(公告)号：US5409570A

公开(公告)日：1995-04-25

申请号：US981467

申请日：1992-11-25

申请人： Bruce F. Griggs ,  Thomas P. Gandek ,  Michael A. Pikulin ,  Allen Rosen ,  Stuart T. Terrett ,  Spencer W. Eachus ,  David E. White ,  William H. Friend ,  Omar F. Ali

发明人： Bruce F. Griggs ,  Thomas P. Gandek ,  Michael A. Pikulin ,  Allen Rosen ,  Stuart T. Terrett ,  Spencer W. Eachus ,  David E. White ,  William H. Friend ,  Omar F. Ali

IPC分类号： B01F7/00 ,  B01F15/00 ,  D21C9/10 ,  D21C9/147 ,  D21C9/153 ,  D21C9/16 ,  D21C9/18

CPC分类号： B01F7/00141 ,  D21C9/10 ,  D21C9/1005 ,  D21C9/1057 ,  D21C9/147 ,  D21C9/153 ,  D21C9/163

摘要： A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine or chlorine-containing compounds by oxygen delignifying the pulp to a K No. of about 14 or less and a viscosity of greater than about 10 cps and thereafter further delignifying the partially delignified pulp by lifting, displacing and tossing the pulp in a radial direction while advancing it in an axial direction in a plug flow-like manner with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp having a K No. of about 6 or less, a viscosity of at least about 7 cps and a GE brightness of at least about 35. The substantially delignified pulp may then be brightened to a final product having a GE brightness of at least about 75, or alternately up to about 83 or more by contacting the ozonated pulp with chlorine dioxide or a peroxide compound. Because of the absence of elemental chlorine in this sequence, filtrate from all stages but the chlorine dioxide stage (if used) can be recovered without sewering. Major environmental improvements are thus achieved.

摘要翻译： 一种木质纤维素纸浆的脱木素和漂白方法，其中不需要使用元素氯或含氯化合物，通过将纸脱木素至K值为约14或更小，粘度大于约10cps，然后进一步脱木质部分 通过提升，移位和将纸浆沿轴向方向推进而沿着轴向方向以塞子流动方式用有效量的臭氧足够的时间来提取，移位和抛弃纸浆，以获得具有K值的基本上脱木素的纸浆 约6或更小，至少约7cps的粘度和至少约35的GE亮度。然后可将基本脱木素的纸浆增亮至具有至少约75的GE亮度或最高至约 通过使臭氧化的纸浆与二氧化氯或过氧化物化合物接触而达到83以上。 由于该序列中没有元素氯，所有阶段的滤液，但是二氧化氯阶段（如果使用的话）可以在没有污水的情况下回收。 因此实现了重大的环境改善。

公开(公告)号：US5656130A

公开(公告)日：1997-08-12

申请号：US430554

申请日：1995-04-28

申请人： Omar F. Ali

发明人： Omar F. Ali

IPC分类号： D21C9/10 ,  D21C9/16 ,  D21C9/147 ,  D21C9/153

CPC分类号： D21C9/1057 ,  D21C9/166

摘要： The present invention relates to a Kraft pulp bleaching stage which is to be carried out after conventional bleaching stages to high brightness. It has been discovered that ambient-temperature bleaching with inorganic peroxy acid salts, such as peroxymonosulfates, at this point can provide substantial increases in pulp brightness without significant decreases in pulp viscosity. Peroxy acid bleaching according to the present invention is carried out at ambient temperature and no greater than about 40.degree. C. and at an initial pH that is slightly alkaline and preferably about 7.25.

摘要翻译： 本发明涉及在常规漂白阶段进行至高亮度的牛皮纸浆漂白阶段。 已经发现，在这一点上，使用无机过氧酸盐（例如过氧化一硫酸盐）的环境温度漂白可以提供纸浆亮度的显着增加，而纸浆粘度没有显着降低。 根据本发明的过氧酸漂白在环境温度和不大于约40℃下进行，初始pH为稍微碱性，优选约7.25。

公开(公告)号：US06896810B2

公开(公告)日：2005-05-24

申请号：US10211043

申请日：2002-08-02

申请人： Omar F. Ali ,  John T. Cenicola ,  Jian Li ,  Jay D. Taylor

发明人： Omar F. Ali ,  John T. Cenicola ,  Jian Li ,  Jay D. Taylor

IPC分类号： C08B1/00 ,  C08B1/08 ,  C08B1/10 ,  C08B1/12 ,  D21C9/00 ,  B01D61/00

CPC分类号： C08B1/00 ,  C08B1/08 ,  C08B1/10 ,  C08B1/12 ,  D21C9/004

摘要： Systems and methods by which to subject cellulosic fibers to alkaline treatment are provided. The systems and methods of the invention include equipment, such as nanofiltration units and slurry concentrators, which result in a lowered overall consumption of alkaline solution during alkaline treatment. The systems and methods of the invention further allow the components of hemicaustic streams produced by such alkaline treatments to be utilized in higher value end uses.

摘要翻译： 提供了使纤维素纤维进行碱处理的系统和方法。 本发明的系统和方法包括诸如纳米过滤单元和浆料浓缩器的设备，其在碱处理期间导致碱溶液的总消耗量降低。 本发明的系统和方法还允许通过这种碱处理产生的半透明气流的组分用于更高价值的最终用途。