EP 0303962 A2 19890222 - Oxygen alkali extraction process for producing bleached pulp.
Title (en)
Oxygen alkali extraction process for producing bleached pulp.
Title (de)
Verfahren zur alkalischen Extraktion in Gegenwart von Sauerstoff für die Herstellung von gebleichter Pulpe.
Title (fr)
Procédé d'extraction en milieu alcalin en présence d'oxygène pour la production de pâte blanchie.
Publication
Application
Priority
US 8632487 A 19870817
Abstract (en)
Oxygen alkali extraction of pulp in a multi-stage bleaching sequence is accomplished in the absence of a dynamic mixer for mixing oxygen with pulp yet obtaining desired pulp brightness and/or reduced chlorine-based chemical consumption, by intimately mixing oxygen with the alkaline pulp at a point before or within the alkaline pulp bleaching stage of the sequence, in the presence of a co-oxidant.
IPC 1-7
IPC 8 full level
D21C 9/10 (2006.01)
CPC (source: EP)
D21C 9/1026 (2013.01)
Designated contracting state (EPC)
AT DE ES FR GR SE
DOCDB simple family (publication)
EP 0303962 A2 19890222; EP 0303962 A3 19910626; BR 8804126 A 19890307; FI 883811 A0 19880817; FI 883811 A 19890218; JP S6485387 A 19890330
DOCDB simple family (application)
EP 88113019 A 19880810; BR 8804126 A 19880816; FI 883811 A 19880817; JP 20455088 A 19880817