公开(公告)号：US6126782A

公开(公告)日：2000-10-03

申请号：US663047

申请日：1996-07-08

申请人： Jan G. Liden ,  Lars .ANG.. G. Ahlenius ,  Otto S. A. G. Lindeberg ,  Sture E. O. Noreus

发明人： Jan G. Liden ,  Lars .ANG.. G. Ahlenius ,  Otto S. A. G. Lindeberg ,  Sture E. O. Noreus

IPC分类号： D21C9/10 ,  D21C9/147 ,  D21C9/153 ,  D21C9/16 ,  D21C9/14

CPC分类号： D21C9/1057 ,  D21C9/1042 ,  D21C9/147 ,  D21C9/153 ,  D21C9/163

摘要： A method for the manufacture of non-chlorine bleached pulp, from alkaline digested cellulose pulp, wherein a suspension of the cellulose pulp is subjected to a series to oxygen gas delignification (O), treatment with complexers (Q) and bleaching with non chlorine-containing oxidative bleaching agents (O,P,Z). The various treatment stages interspersed with washing and/or reconcentration of the cellulose pulp in at least one stage, in conjunction with which a suspension liquid is conveyed essentially in strict counter-current, with the result that the pulp manufacturing process is essentially totally closed with regard to the liquid circuit. The pH value of the suspension liquid, in the absence of a reduction agent, after oxygen gas delignification and onwards into the cellulose pulp treatment chain as far as the bleaching operation with the oxidative bleaching agent, is caused to attain a maximum of 10, and in that the carbonate content of the suspension liquid is caused to be the same as, or to exceed a certain lowest value depending on its position in the cellulose pulp treatment chain.

摘要翻译： PCT No.PCT / SE94 / 01204 Sec。 371日期：1996年7月8日 102（e）日期1996年7月8日PCT 1994年12月14日PCT PCT。 WO95 / 16818 PCT出版物 日期1995年6月22日从碱性消化的纤维素纸浆制造非氯漂白纸浆的方法，其中将纤维素纸浆的悬浮液与氧气脱木质素（O）进行串联处理，用络合物（Q）和 用不含氯的氧化漂白剂（O，P，Z）漂白。 各种处理阶段在至少一个阶段中散布着纤维素纸浆的洗涤和/或再浓缩，结合基本上以严格的逆流输送悬浮液，结果是纸浆制造过程基本上完全被封闭 关于液体回路。 使得在不存在还原剂的情况下，悬浮液的pH值在氧气脱木质化之后并且进入纤维素纸浆处理链，直到用氧化漂白剂的漂白操作达到最大值10，并且 由于悬浮液的碳酸盐含量与纤维素纸浆处理链中的位置相同或超过一定的最低值。

公开(公告)号：US06258208B1

公开(公告)日：2001-07-10

申请号：US08714171

申请日：1996-09-27

申请人： Otto S. A. G. Lindeberg ,  Lars A. G. Ahlenius ,  Jan G. Lidén ,  Sture E. O. Noréus

发明人： Otto S. A. G. Lindeberg ,  Lars A. G. Ahlenius ,  Jan G. Lidén ,  Sture E. O. Noréus

IPC分类号： D21C914

CPC分类号： D21C9/144 ,  D21C9/1042

摘要： A method for the manufacture of bleached cellulose pulp, in conjunction with which lignocellulose material is digested to form cellulose pulp by means of an alkaline digestion liquor, and the cellulose pulp in the form of a suspension is screened, if necessary, and subjected in series to at least oxygen gas delignification/bleaching (O), if required, chlorine dioxide bleaching (D) and bleaching with non chlorine-containing, oxidative bleaching agent (O, P, Z), with the various bleaching stages interspersed with washing and/or reconcentration of the cellulose pulp in at least one stage, characterized in that complexing agents are added to the cellulose pulp in conjunction with the chlorine dioxide bleaching. It is also important for the mol quotient of the cellulose pulp for magnesium/manganese, during bleaching with a non chlorine-containing, oxidative bleaching agent, to be maintained at or brought to a value exceeding 20, and preferably exceeding 40.

摘要翻译： 用于制造漂白的纤维素纸浆的方法与木质纤维素材料一起被消化以通过碱性消化液形成纤维素纸浆，并且必要时筛选悬浮液形式的纤维素纸浆并串联进行 至少氧气脱木素/漂白（O），如果需要，二氧化氯漂白（D）和漂白与非含氯氧化漂白剂（O，P，Z），各种漂白阶段散布着洗涤和/ 或在至少一个阶段再次浓缩纤维素纸浆，其特征在于将络合剂与二氧化氯漂白相结合加入到纤维素纸浆中。 在用不含氯的氧化漂白剂漂白的情况下，对于镁/锰的纤维素纸浆的摩尔商也是重要的，保持在或超过20，优选超过40的值。