FREMGANGSMAATE TIL BEHANDLING AV CELLULOSEHOLDIG MATERIALE

The invention relates to a process for bleaching cellulose-containing material, in detail for bleaching in a multi-stage sequence, in which the first bleaching stage is carried out in two phases, that is to say a first phase with elemental chlorine and a second phase with chlorine dioxide water. One...

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Bibliographische Detailangaben
Hauptverfasser:	LINDSTROEM, LARS-AAKE, LINDBLAD, PER-OLOV, ANNERGREN, GOERAN ERIK
Format:	Patent
Sprache:	nor
Schlagworte:	APPARATUS THEREFOR PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES
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Beschreibung
Zusammenfassung:	The invention relates to a process for bleaching cellulose-containing material, in detail for bleaching in a multi-stage sequence, in which the first bleaching stage is carried out in two phases, that is to say a first phase with elemental chlorine and a second phase with chlorine dioxide water. One subject of the invention is a reduction in the chlorination of the organic material. According to the invention, this is achieved by limiting the proportion of chlorine fed in the first phase in such a way that the end pH in the liquid of the chlorine phase exceeds 3.0.