公开(公告)号：US4080249A

公开(公告)日：1978-03-21

申请号：US705869

申请日：1976-07-16

申请人： Arthur W. Kempf ,  Richard B. Phillips

发明人： Arthur W. Kempf ,  Richard B. Phillips

IPC分类号： D21C9/10

CPC分类号： D21C9/1073

摘要： A process for the delignification and bleaching of a lignocellulosic pulp slurry, having a consistency between about 1% and 10%, by weight of oven-dried pulp, and a pH between about 1 and 7, while at a temperature between about 0.degree. C. and 70.degree. C., with a gaseous mixture selected from the group consisting of ozone/oxygen, ozone/air, and a mixture thereof. The ozone containing gaseous mixture, which has an ozone concentration of from about 0.1% to about 20%, by weight of oxygen or air, is bubbled into the pulp slurry, while agitating the pulp slurry at a rate of about 0.01 to 5.0 horsepower-days per ton of pulp.

摘要翻译： 一种木质纤维素浆浆的脱木质素和脱色方法，其具有约1％至10％（重量）烘干纸浆和约1至7％之间的pH，而在约0℃ 具有选自臭氧/氧气，臭氧/空气及其混合物的气体混合物。 臭氧浓度为约0.1％至约20％（重量）的氧气或空气的含臭氧气体混合物鼓泡到纸浆中，同时以约0.01至5.0马力的速率搅拌纸浆， 天每吨纸浆。

公开(公告)号：US4002526A

公开(公告)日：1977-01-11

申请号：US621355

申请日：1975-10-10

申请人： Kenton J. Brown ,  Arthur W. Kempf

发明人： Kenton J. Brown ,  Arthur W. Kempf

IPC分类号： D21C3/00 ,  D21C9/10 ,  D21C9/147

CPC分类号： D21C9/1036

摘要： An process for increasing the yields of wood pulp and improving the viscosity of the pulp during oxygen-alkali delignification is provided whereby, in a wood pulp at a consistency of about 1-10%, there are present, in the pulp to be delignified, small amounts of ammonia or a compound which releases ammonia under the alkaline conditions of the process.

摘要翻译： 提供了一种在氧碱脱木质素期间提高木浆产量和提高纸浆粘度的方法，其中在约1-10％稠度的木浆中，在待脱木质纤维中存在， 少量的氨或在该过程的碱性条件下释放氨的化合物。

公开(公告)号：US4372812A

公开(公告)日：1983-02-08

申请号：US233668

申请日：1981-02-11

申请人： Richard B. Phillips ,  Arthur W. Kempf ,  Robert C. Eckert

发明人： Richard B. Phillips ,  Arthur W. Kempf ,  Robert C. Eckert

IPC分类号： D21C9/10 ,  D21C9/16

CPC分类号： D21C9/1057

摘要： A chlorine-free bleaching process for lignocellulosic pulp characterized by a series of bleaching stages comprising in sequence a peroxide bleaching stage, the peroxide being selected from the group consisting of alkaline hydrogen peroxide, acidic hydrogen peroxide, and peroxy acid and at least one ozone bleaching stage and in one embodiment the sequence including an initial oxygen bleaching stage before the peroxide bleaching stage. In continuous operation the effluent from each of these sequential stages provides the preferred wash for the preceding washing step and the diluent for the preceding bleaching stage, the final effluent being recyclable for effective closed cycle operation.

摘要翻译： 一种用于木质纤维素纸浆的无氯漂白方法，其特征在于一系列漂白阶段，其顺序包括过氧化物漂白阶段，所述过氧化物选自碱性过氧化氢，酸性过氧化氢和过氧酸，以及至少一种臭氧漂白 在一个实施方案中，该序列包括在过氧化物漂白阶段之前的初始氧漂白阶段。 在连续操作中，来自每个这些顺序阶段的流出物为先前的洗涤步骤提供了优选的洗涤和用于前一漂白阶段的稀释剂，最终的流出物可循环使用以进行有效的闭环操作。

公开(公告)号：US4410397A

公开(公告)日：1983-10-18

申请号：US220162

申请日：1980-12-24

申请人： Arthur W. Kempf

发明人： Arthur W. Kempf

IPC分类号： D21C9/16

CPC分类号： D21C9/163

摘要： An improved peroxide based brightening and delignifying solution and process for liqnocellulosic pulp, characterized by selective delignification and pulp viscosity retention is disclosed. The process comprises maintaining a pulp slurry to a temperature between 40.degree. C. and 120.degree. C. for 0.5 hours to 8 hours. The slurry comprises lignocellulosic pulp; from 0.1% to 20% by weight based on O.D. pulp of peroxide; from 0.1% to 10% by weight based on O.D. pulp of a metal-containing additive whose metallic portion is selected from the group consisting of tin, titanium, and vanadium; and sufficient acid to maintain the .sub.f H of the slurry between about 1 and about 7. In a preferred embodiment of this invention, a tin additive is employed and the partially delignified and brightened pulp is further bleached with the unconsumed peroxide by adjusting the pH of the slurry to between 8 and 12 and maintaining the temperature of the slurry from 40.degree. C. to 90.degree. C. for 0.1 to 4 hours.

摘要翻译： 公开了一种改进的基于过氧化物的增亮和脱木素溶液和用于液体纤维素纸浆的方法，其特征在于选择性脱木素和纸浆粘度保留。 该方法包括将纸浆保持在40℃至120℃的温度下0.5小时至8小时。 浆料包括木质纤维素纸浆; 基于O.D.为0.1〜20重量％。 过氧化物纸浆; 基于O.D的0.1重量％至10重量％。 其金属部分选自锡，钛和钒的含金属添加剂的纸浆; 和足够的酸以保持浆料的fH在约1至约7之间。在本发明的一个优选实施方案中，使用锡添加剂，并且通过调节pH值来进一步漂白未部分脱木素和增亮的纸浆 浆料至8至12，并将浆料的温度从40℃维持在90℃下0.1至4小时。