公开(公告)号：EP0716182A3

公开(公告)日：1996-11-13

申请号：EP95118395.3

申请日：1995-11-22

申请人： ALCELL TECHNOLOGIES INC.

发明人： Cronlund, Malcolm ,  Lora, Jairo H. ,  Powers, Jeanne ,  Singh, Uday

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

CPC分类号： D21C9/147 ,  D21C9/1057 ,  D21C9/153 ,  D21C9/16

摘要： This invention provides for a batch and continuous process with countercurrent recycle of bleaching filtrates for the delignification and bleaching of organosolv pulp. Oxygen delignification of organosolv pulp is achieved in excess of from about 50% to about 76% as measured by kappa numbers, while the pulp viscosity is minimally decreased in the range of from about 2 to about 5 cps. Bleaching of delignified pulp is achieved with peroxy compounds and ozone and pulp brightness of from about 82 to 88 ISO can be achieved with pulp containing zero level TOX from chlorine based bleaching chemicals and zero level of AOX in the bleach effluents. Higher brightness of from about 90 to about 92 ISO can also be achieved by addition of very low levels of chlorine based bleaching chemicals. Corresponding bleach effluents contain less than 200 ppm AOX. Bleaching filtrates can be recycled for pulp washing and for use with an organosolv pulping process which results in significant energy savings and mitigation if not elimination of pollution typically associated with chlorine based bleaching. This invention also relates to bleach pulp product derived from the process.

摘要翻译： 本发明提供了用于有机溶剂纸浆脱木素和漂白的漂白滤液的逆流再循环的间歇和连续方法。 通过卡伯值测量，有机溶剂纸浆的氧脱木素达到超过约50％至约76％，而纸浆粘度在约2至约5cps的范围内最小降低。 脱木质纸浆的漂白是通过过氧化合物和臭氧实现的，纸浆的亮度可以达到约82〜88℃，纸浆含有来自氯系漂白化学品的零级TOX纸浆和漂白剂中的AOX零水平。 通过加入非常低水平的氯基漂白化学品也可以达到约90至约92 ISO的较高亮度。 相应的漂白废水含有少于200ppm的AOX。 漂白的滤液可以回收用于纸浆清洗和用于有机溶剂制浆过程，如果不消除通常与氯基漂白相关的污染，则可以显着节能和减轻污染。 本发明还涉及从该方法衍生的漂白纸浆产品。

公开(公告)号：EP0716182A2

公开(公告)日：1996-06-12

申请号：EP95118395.3

申请日：1995-11-22

申请人： ALCELL TECHNOLOGIES INC.

发明人： Cronlund, Malcolm ,  Lora, Jairo H. ,  Powers, Jeanne ,  Singh, Uday

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

CPC分类号： D21C9/147 ,  D21C9/1057 ,  D21C9/153 ,  D21C9/16

摘要： This invention provides for a batch and continuous process with countercurrent recycle of bleaching filtrates for the delignification and bleaching of organosolv pulp. Oxygen delignification of organosolv pulp is achieved in excess of from about 50% to about 76% as measured by kappa numbers, while the pulp viscosity is minimally decreased in the range of from about 2 to about 5 cps. Bleaching of delignified pulp is achieved with peroxy compounds and ozone and pulp brightness of from about 82 to 88 ISO can be achieved with pulp containing zero level TOX from chlorine based bleaching chemicals and zero level of AOX in the bleach effluents. Higher brightness of from about 90 to about 92 ISO can also be achieved by addition of very low levels of chlorine based bleaching chemicals. Corresponding bleach effluents contain less than 200 ppm AOX. Bleaching filtrates can be recycled for pulp washing and for use with an organosolv pulping process which results in significant energy savings and mitigation if not elimination of pollution typically associated with chlorine based bleaching. This invention also relates to bleach pulp product derived from the process.

摘要翻译： 本发明提供了用漂白滤液逆流循环的分批和连续方法，用于有机溶剂纸浆的脱木素和漂白。 如通过卡伯值测量，有机溶剂纸浆的氧脱木质素达到约50％至约76％，而纸浆粘度在约2至约5cps的范围内最小程度地降低。 用过氧化合物和臭氧可以实现脱木素纸浆的漂白，纸浆白度可以达到约82-88 ISO，纸浆含有来自氯漂白化学品的零级TOX和漂白废液中AOX的零级别。 通过添加非常低含量的基于氯的漂白化学品也可实现从约90至约92 ISO的更高亮度。 相应的漂白剂流出物含有小于200ppm的AOX。 漂白滤液可循环用于洗浆并用于有机溶剂制浆工艺，如果不能消除通常与氯漂白相关的污染，则可显着节省能源并减轻能量。 本发明还涉及由该方法得到的漂白纸浆产品。