Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone

Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone

Process for bleaching of pulps following cooking of the lignocellulosic material with soda and anthraquinone. The process may produce a whiteness on par with the bleaching of kraft pulp when using a similar bleaching sequence. In some instances, the bleaching sequence may be O-A-Do-Eop-D, O-A-ZDo-Eo...

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Bibliographische Detailangaben
Hauptverfasser: O'Leary, Pam, Shin, Namhee, Stromberg, C. Bertil
Format: Patent
Sprache:eng
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Zusammenfassung:Process for bleaching of pulps following cooking of the lignocellulosic material with soda and anthraquinone. The process may produce a whiteness on par with the bleaching of kraft pulp when using a similar bleaching sequence. In some instances, the bleaching sequence may be O-A-Do-Eop-D, O-A-ZDo-Eop-D, A-Do, or A-ZDo.