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公开(公告)号：US5441603A
公开(公告)日：1995-08-15
申请号：US97699
申请日：1993-07-27
CPC分类号： D21C9/1057 , D21C9/153
摘要： A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine by partially delignifying the pulp to a K No. of about 10 or less and a viscosity of greater than about 13 cps; and further delignifying the partially delignified pulp with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp having a K No. of about 5 or less, a viscosity of greater than about 10, and a GE brightness of at least about 50%. The substantially delignified pulp may be brightened by the addition of a bleaching agent such as chlorine dioxide or a peroxide to obtain a final product having a GE brightness of at least about 65%, preferably above 70% to as high as 90%. 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： 通过将纸浆部分脱木素至约10或更小的K值和大于约13cps的粘度，而不使用元素氯来脱木素和漂白木质纤维素纸浆的方法; 并且用有效量的臭氧进一步脱木质部分脱木素足够的时间以获得具有约5或更小的K值，大于约10的粘度和大于约10的GE亮度的基本上脱木素的纸浆 50％。 通过加入漂白剂如二氧化氯或过氧化物可以使基本上脱木素的纸浆变亮，以获得GE亮度为至少约65％，优选高于70％至高达90％的最终产品。 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。
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2.发明授权Environmentally improved process for bleaching lignocellulosic materials with oxygen, ozone and chlorine dioxide 失效用氧气，臭氧和二氧化氯漂白木质纤维素材料的环境改良方法
公开(公告)号：US5296099A
公开(公告)日：1994-03-22
申请号：US938736
申请日：1992-08-28
CPC分类号： D21C9/153 , D21C9/1057
摘要： A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine by partially delignifying the pulp to a K No. of about 10 or less and a viscosity of greater than about 13 cps; and further delignifying the partially delignified pulp with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp having a K No. of about 5 or less, a viscosity of greater than about 10, and a GE brightness of at least about 50%. The substantially delignified pulp may be brightened by the addition of a bleaching agent such as chlorine dioxide or a peroxide to obtain a final product having a GE brightness of at least about 65%, preferably above 70% to as high as 90%. 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： 通过将纸浆部分脱木素至约10或更小的K值和大于约13cps的粘度，而不使用元素氯来脱木素和漂白木质纤维素纸浆的方法; 并且用有效量的臭氧进一步脱木质部分脱木素足够的时间以获得具有约5或更小的K值，大于约10的粘度和大于约10的GE亮度的基本上脱木素的纸浆 50％。 通过加入漂白剂如二氧化氯或过氧化物可以使基本上脱木素的纸浆变亮，以获得GE亮度至少为约65％，优选高于70％至高达90％的最终产品。 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。
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3.发明授权Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp 失效通过从碱性浆中去除和回收压力来氧化高浓度浆液的方法
公开(公告)号：US5217574A
公开(公告)日：1993-06-08
申请号：US686062
申请日：1991-04-16
申请人： Bruce F. Griggs
发明人： Bruce F. Griggs
CPC分类号： D21C9/1005 , D21C9/147
摘要： Unbleached pulp is combined with an aqueous alkaline solution while in a state of low consistency to distribute a first amount of alkaline material substantially uniformly throughout the pulp. The consistency of the pulp is then increased to above about 18%, and the high consistency alkali containing pulp is then treated with oxygen to effect delignification. The total amount of alkaline material applied to the pulp is between 0.8 and 7% by weight of oven dry pulp. High strength, low lignin pulps are subsequently formed which may be further bleached to high brightness with reduced amounts of chemicals.
摘要翻译： 未漂白的纸浆与碱性水溶液结合，同时处于低稠度的状态，以便在整个纸浆中基本均匀分布第一量的碱性物质。 然后将纸浆的稠度提高到约18％以上，然后用氧气处理高浓度含碱纸浆以进行脱木质素。 施用于纸浆的碱性物质的总量为烘干纸浆的0.8至7重量％。 随后形成高强度，低木质素纸浆，其可以进一步漂白至具有减少量化学品的高亮度。
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4.发明授权Environmentally improved process for bleaching lignocellulosic materials with ozone 失效用臭氧漂白木质纤维素材料的环境改善方法
公开(公告)号：US5164043A
公开(公告)日：1992-11-17
申请号：US749753
申请日：1991-08-26
CPC分类号： D21C9/1057 , D21C9/153
摘要： A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine by partially delignifying the pulp to a K No. of about 10 or less and a viscosity of greater than about 13 cps; and further delignifying the partially delignified pulp with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp having a K No. of about 5 or less, a viscosity of greater than about 10, and a GE brightness of at least about 50%. The substantially delignified pulp may be brightened by the addition of a bleaching agent such as chlorine dioxide or a peroxide to obtain a final product having a GE brightness of at least about 65%, preferably above 70% to as high as 90%. 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： 通过将纸浆部分脱木素至约10或更小的K值和大于约13cps的粘度，而不使用元素氯来脱木素和漂白木质纤维素纸浆的方法; 并且用有效量的臭氧进一步脱木质部分脱木素足够的时间以获得具有约5或更小的K值，大于约10的粘度和大于约10的GE亮度的基本上脱木素的纸浆 50％。 通过加入漂白剂如二氧化氯或过氧化物可以使基本上脱木素的纸浆变亮，以获得GE亮度至少为约65％，优选高于70％至高达90％的最终产品。 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。
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5.发明授权Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone 失效在将纸浆输送通过反应区域时，臭氧漂白氧脱木质素的方法
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
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。
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6.发明授权Process for high consistency delignification using a low consistency alkali pretreatment 失效使用低浓度碱预处理的高稠度脱木质素的方法
公开(公告)号：US5525195A
公开(公告)日：1996-06-11
申请号：US117341
申请日：1993-09-07
CPC分类号： D21C9/147 , D21C9/02 , D21C9/1005
摘要： Unbleached pulp is washed with an aqueous alkaline solution in a wash press to substantially uniformly distribute a first amount of alkaline material throughout the pulp. The consistency of the pulp exiting the wash press is above about 18%, preferably between 25 to 35 percent by weight, and the high consistency alkali containing pulp is then treated with oxygen to effect delignification. The use of a wash press reduces the overall amounts of alkaline material utilized in the process compared to processes which add alkaline material to the pulp at low consistency. Additional alkali may be applied, if desired, onto the high consistency pulp prior to oxygen delignification to provide a total amount of between 0.8 and 7 percent by weight of oven dry pulp. High strength, low lignin pulps are formed after oxygen delignification which may be further bleached to high brightness with reduced amounts of bleaching chemicals.
摘要翻译： 未漂白的纸浆在洗涤压榨机中用碱性水溶液洗涤以在整个纸浆中基本上均匀分布第一量的碱性材料。 离开洗涤压榨机的纸浆的稠度高于约18％，优选25至35重量％，然后用氧气处理含高浓度碱性纸浆以进行脱木质素。 与在低浓度下向纸浆中添加碱性物质的方法相比，使用洗涤压榨机减少了在该方法中使用的碱性物质的总量。 如果需要，可以在氧脱木素之前将额外的碱施加到高浓度纸浆上，以提供总量为烘箱干浆的0.8-7重量％。 氧脱木质后形成高强度，低木质素纸浆，其可以进一步漂白至高亮度，并减少漂白剂的量。
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7.发明授权Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification 失效通过臭氧处理进行碱性处理的粉末的高度一致性氧化处理的方法
公开(公告)号：US5211811A
公开(公告)日：1993-05-18
申请号：US749744
申请日：1991-08-26
CPC分类号： D21C9/147 , D21C9/1005
摘要： A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine by partially delignifying the pulp to a K No. of about 10 or less and a viscosity of greater than about 13 cps; and further delignifying the partially delignified pulp with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp having a K No. of about 5 or less, a viscosity of greater than about 10, and a GE brightness of at least about 50%. The substantially delignified pulp may be brightened by the addition of a bleaching agent such as chlorine dioxide or a peroxide to obtain a final product having a GE brightness of at least about 65%, preferably above 70% to as high as 90%. 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： 通过将纸浆部分脱木素至约10或更小的K值和大于约13cps的粘度，而不使用元素氯来脱木素和漂白木质纤维素纸浆的方法; 并且用有效量的臭氧进一步脱木质部分脱木素足够的时间以获得具有约5或更小的K值，大于约10的粘度和大于约10的GE亮度的基本上脱木素的纸浆 50％。 通过加入漂白剂如二氧化氯或过氧化物可以使基本上脱木素的纸浆变亮，以获得GE亮度至少为约65％，优选高于70％至高达90％的最终产品。 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。
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8.发明授权Process for enhanced oxygen delignification using high consistency and a split alkali addition 失效使用高度一致性和分离碱性添加剂的增强氧化方法
公开(公告)号：US5173153A
公开(公告)日：1992-12-22
申请号：US637100
申请日：1991-01-03
IPC分类号： D21C20060101 , D21C9/10 , D21C9/147
CPC分类号： D21C9/1005 , D21C9/147
摘要： Unbleached pulp is combined with an aqueous alkaline solution while in a state of low consistency to distribute a first amount of alkaline material substantially uniformly throughout the pulp. The consistency of the pulp is then increased to above about 20%. Additional alkali is applied onto the high consistency pulp to provide a total amount of between 0.8 and 7% by weight of oven dry pulp. The high consistency alkali containing pulp is then treated with oxygen to effect delignification. High strength, low lignin pulps are formed which may be further bleached to high brightness with reduced amounts of chemicals by following the methods of the invention.
摘要翻译： 未漂白的纸浆与碱性水溶液结合，同时处于低稠度的状态，以便在整个纸浆中基本均匀分布第一量的碱性物质。 然后将纸浆的稠度提高到约20％以上。 额外的碱被施加到高浓度纸浆上，以提供总量为烘箱干浆的0.8至7重量％。 然后用氧气处理含高浓度碱性纸浆以进行脱木质素。 形成高强度，低木质素纸浆，其可以通过遵循本发明的方法进一步漂白至高亮度，减少量的化学品。
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9.发明授权Environmentally improved process for bleaching lignocellulosic materials with ozone 失效用臭氧漂白木质纤维素材料的环境改善方法
公开(公告)号：US5164044A
公开(公告)日：1992-11-17
申请号：US749786
申请日：1991-08-26
CPC分类号： D21C9/153 , D21C9/1057
摘要： A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine by partially delignifying the pulp to a K No. of about 10 or less and a viscosity of greater than about 13 cps; and further delignifying the partially delignified pulp with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp having a K No. of about 5 or less, a viscosity of greater than about 10, and a GE brightness of at least about 50%. The substantially delignified pulp may be brightened by the addition of a bleaching agent such as chlorine dioxide or a peroxide to obtain a final product having a GE brightness of at least about 65%, preferably above 70% to as high as 90%. 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： 通过将纸浆部分脱木素至约10或更小的K值和大于约13cps的粘度，而不使用元素氯来脱木素和漂白木质纤维素纸浆的方法; 并且用有效量的臭氧进一步脱木质部分脱木素足够的时间以获得具有约5或更小的K值，大于约10的粘度和大于约10的GE亮度的基本上脱木素的纸浆 50％。 通过加入漂白剂如二氧化氯或过氧化物可以使基本上脱木素的纸浆变亮，以获得GE亮度至少为约65％，优选高于70％至高达90％的最终产品。 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。
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10.发明授权Methods of high consistency oxygen delignification using a low consistency alkali pretreatment 失效使用低浓度碱预处理的高浓度氧脱木质素的方法
公开(公告)号：US5085734A
公开(公告)日：1992-02-04
申请号：US489845
申请日：1990-03-02
申请人： Bruce F. Griggs
发明人： Bruce F. Griggs
CPC分类号： D21C9/147 , D21C9/1005
摘要： A method for the production of delignified wood pulp is provided which result in said pulp's having improved delignification ratios. In accordance with preferred embodiments, brownstocks are substantially uniformly treated with aqueous alkaline solution while in a state of low consistency. The consistency is then increased to values preferably in excess of about 20% and the brownstock treated with oxygen to effect delignification. The processes of the invention provide surprising improvements over prior methods in the high strength, low lignin containing pulps may be formed thereby. These pulps can be further bleached to high brightness with less subsequent bleach chemical.
摘要翻译： 提供了生产脱木质木浆的方法，其导致所述纸浆具有改善的脱木质比。 根据优选的实施方案，在低浓度的状态下，碱性水溶液基本均匀地处理。 然后将稠度提高至优选超过约20％的值，并用氧气处理的褐色原料进行脱木素化。 与之前的方法相比，本发明的方法提供了令人惊奇的改进，因此可以形成高强度，低木质素的纸浆。 这些纸浆可以进一步漂白至高亮度，随后漂白化学品少。
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