| 摘要 |
When using oxidative bleaching agents, such as peroxide, to delignify and/or bleach ligning containing cellulosic pulp, difficulty explained swings are sometimes obtained in the bleaching results. This problem is solved by the present invention, which relates to a method in which the cellulose pulp is pretreated with a complexing agent in the presence of liquid and sodium ions and then treated with an oxidative bleaching agent. The method is characterized by adding a process foreign magnesium in any form to the cellulose pulp prior to and/or during the pretreatment process, in a quantity which is determined at least partially by the amount of sodium ions present. |
