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。