SAETT ATT FRAMSTAELLA CELLULOSAMASSA MED HOEG LJUSHET

SAETT ATT FRAMSTAELLA CELLULOSAMASSA MED HOEG LJUSHET

A process is provided for producing cellulose pulp of high brightness, which comprises pulping lignocellulosic material such as wood with oxygen under superatmospheric pressure in two stages, in the first at a pH within the range from about 6 to about 9, and in the second at a more alkaline pH of at...

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Bibliographische Detailangaben
Hauptverfasser: SAMUELSON HANS OLOF, HAEGGLUND ERIK OLOF STURE, SMEDMAN LEIF AOKE
Format: Patent
Sprache:fin
Schlagworte:
APPARATUS THEREFOR
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
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Beschreibung
Zusammenfassung:A process is provided for producing cellulose pulp of high brightness, which comprises pulping lignocellulosic material such as wood with oxygen under superatmospheric pressure in two stages, in the first at a pH within the range from about 6 to about 9, and in the second at a more alkaline pH of at least about 10.