Method of Bleaching Pulp Without Using Chlorine-Containing Chemicals

摘要

The present invention relates to a process for producing pulp which is cooked under alkaline conditions and which is bleached without using chlorine-containing bleaching chemicals, in which process used cooking chemicals are recovered in a first recovery installation (18) and used bleaching chemicals are recovered in a second recovery installation (12), and, preferably, these bleaching chemicals are regenerated, wholly or in part, and reused in an oxygen-delignification stage (7) and/or in a TCF bleaching stage (9).