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1.发明授权Reduction of salt scale precipitation by control of process stream pH and salt concentration 失效通过控制工艺流的pH和盐浓度来减少盐垢沉淀
公开(公告)号：US5693184A
公开(公告)日：1997-12-02
申请号：US708865
申请日：1996-09-04
CPC分类号： D21C9/008 , D21C11/0028 , D21C9/1057 , D21C9/147 , D21C9/153 , Y10S162/08
摘要： A method for reducing or eliminating the formation of salt scale upon process equipment caused by precipitation of insoluble salts during the bleaching of pulp. The pulp is subjected to a bleaching sequence which includes a plurality of pulp treatment steps, wherein at least one pulp treatment step is conducted under alkaline conditions and at least one pulp treatment step is conducted under acidic conditions. A filtrate stream which contains dissolved insoluble salts therein is thus generated, and at least a portion of the filtrate stream is combined with an alkaline stream and pulp to cause the salts to associate with the pulp, thus removing the salts from the filtrate stream to reduce or eliminate the formation of salt scale upon process equipment during the bleaching of the pulp.
摘要翻译： 一种减少或消除在漂白纸浆期间沉淀不溶性盐造成的加工设备上盐垢形成的方法。 对纸浆进行漂白处理，其中包括多个纸浆处理步骤，其中至少一个纸浆处理步骤在碱性条件下进行，并且在酸性条件下进行至少一个纸浆处理步骤。 因此产生其中含有溶解的不溶性盐的滤液流，并且将至少一部分滤液流与碱性流和纸浆混合以使盐与纸浆缔合，从而从滤液流中除去盐以减少 或在纸浆的漂白过程中消除在加工设备上形成盐垢。
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2.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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3.发明授权Reduction of salt scale precipitation by control of process stream Ph and salt concentration 失效通过控制工艺流Ph和盐浓度来减少盐垢沉淀
公开(公告)号：US5554259A
公开(公告)日：1996-09-10
申请号：US130619
申请日：1993-10-01
CPC分类号： D21C9/008 , D21C11/0028 , D21C9/1057 , D21C9/147 , D21C9/153 , Y10S162/08
摘要： A method for reducing or eliminating the formation of salt scale upon process equipment caused by precipitation of salts during the bleaching of pulp. The pulp is subjected to a bleaching sequence which includes a plurality of pulp treatment steps, wherein at least one pulp treatment step is conducted under alkaline conditions and at least one pulp treatment step is conducted under acidic conditions. A filtrate stream which contains dissolved salts therein is thus generated, and at least a portion of the filtrate stream is combined with an alkaline stream and pulp to cause the salts to associate with the pulp, thus removing the salts from the filtrate stream to reduce or eliminate the formation of salt scale upon process equipment during the bleaching of the pulp.
摘要翻译： 一种减少或消除在漂白纸浆期间盐沉淀引起的工艺设备上盐垢形成的方法。 对纸浆进行漂白处理，其中包括多个纸浆处理步骤，其中至少一个纸浆处理步骤在碱性条件下进行，并且在酸性条件下进行至少一个纸浆处理步骤。 因此产生其中含有溶解盐的滤液流，并且将至少一部分滤液流与碱性流和纸浆结合，使盐与纸浆缔合，从而从滤液流中除去盐以减少或 在纸浆的漂白过程中消除了加工设备上盐垢的形成。
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4.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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5.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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公开(公告)号：US5520783A
公开(公告)日：1996-05-28
申请号：US8382
申请日：1993-01-25
CPC分类号： D21C9/10 , B01F7/00141 , D21C9/153 , B01F7/001 , B01F7/00433
摘要： An apparatus and method for bleaching high consistency lignocellulosic pulp using ozone supplied in an ozone containing gas. The bleaching reactor apparatus according to the invention is a generally cylindrical vessel itself being rotatable or with a rotatable shaft having radially extending paddles arranged in a configuration to minimize axial dispersion of the pulp and maximize radial dispersion of the pulp to provide a radially dispersed plug flow of pulp through the reactor in the presence of the ozone to provide substantially uniformly bleached pulp.
摘要翻译： 一种使用在含臭氧气体中提供的臭氧漂白高浓度木质纤维素纸浆的设备和方法。 根据本发明的漂白反应器装置本身是可旋转的或具有可旋转的轴的旋转轴，其具有径向延伸的叶片，其布置成使得纸浆的轴向分散最小化，并使纸浆的径向扩散最大化以提供径向分散的塞子流 的纸浆通过反应器在臭氧存在下提供基本上均匀漂白的纸浆。
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7.发明授权Process for high consistency oxygen delignification followed by ozone relignification 失效通过臭氧相关性进行高度一致性氧化处理的方法
公开(公告)号：US5188708A
公开(公告)日：1993-02-23
申请号：US751359
申请日：1991-08-26
CPC分类号： D21C9/1005 , D21C9/1057 , D21C9/147 , 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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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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9.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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公开(公告)号：US5174861A
公开(公告)日：1992-12-29
申请号：US751262
申请日：1991-08-28
摘要： A method for delignifying and bleaching a lignocellulosic pulp with a gaseous bleaching agent in a reactor without the use of elemental chlorine. The bleaching reactor is a horizontal vessel having a central rotatable shaft which preferably contains paddles, cut and folded screw flights or a ribbon flight, to disperse and advance the pulp particles in a plug flow manner while contacting and mixing the pulp particles with a gaseous bleaching agent such as ozone for substantially uniform bleaching thereof.
摘要翻译： 在不使用元素氯的情况下，在反应器中用气态漂白剂脱木素和漂白木质纤维素纸浆的方法。 漂白反应器是具有中心可旋转轴的水平容器，其优选地包含桨叶，切割和折叠的螺旋螺纹或带状飞行，以便以浆液流动方式分散和推进纸浆颗粒，同时使纸浆颗粒与气体漂白 例如臭氧剂用于其基本均匀的漂白。
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