Fremgangsmåte ved delignifisering av lignocellulosefibre

Fremgangsmåte ved delignifisering av lignocellulosefibre

A process is provided for a two-stage oxygen delignification of chemical pulp in which 0.01% to 1% hydrogen peroxide is incorporated into the first and, optionally the second stage. The invention is particularly suitable when the pulp is subsequently bleached with at least one chlorine dioxide stage...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PARTHASARATHY, V.R, JAMEEL, HASAN, KLEIN, RONALD JAMES, GRATZL, JOSEF STEPHAN, SUNDARAM, MEENAKSHI
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:A process is provided for a two-stage oxygen delignification of chemical pulp in which 0.01% to 1% hydrogen peroxide is incorporated into the first and, optionally the second stage. The invention is particularly suitable when the pulp is subsequently bleached with at least one chlorine dioxide stage and at least one hydrogen peroxide stage.