EP 0553141 B1 19940928 - METHOD FOR PRESERVING THE MECHANICAL STRENGTH PROPERTIES OF CHEMICAL PAPER PULP.
Title (en)
METHOD FOR PRESERVING THE MECHANICAL STRENGTH PROPERTIES OF CHEMICAL PAPER PULP.
Title (de)
VERFAHREN ZUR ERHALTUNG DER MECHANISCHEN FESTIGKEIT VON CHEMISCHEN ZELLSTOFFEN.
Title (fr)
PROCEDE POUR LA PRESERVATION DES CARACTERISTIQUES DE RESISTANCE MECANIQUE DES PATES A PAPIER CHIMIQUES.
Publication
Application
Priority
- BE 9000985 A 19901017
- EP 9101906 W 19911004
Abstract (en)
[origin: WO9207139A1] A method for preserving the mechanical strength properties of chemical paper pulp comprises two processing steps using a peroxygenated reagent, the first of which is carried out in an acidic medium while the second is carried out in an alkaline one, treatment with a reducing compound being inserted therebetween.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
D21C 9/1057 (2013.01 - EP US); D21C 9/1084 (2013.01 - EP US); D21C 9/16 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR IT NL SE
DOCDB simple family (publication)
WO 9207139 A1 19920430; AT E112340 T1 19941015; AU 648115 B2 19940414; AU 8637191 A 19920520; BE 1004630 A3 19921222; BR 9107000 A 19930908; CA 2094268 A1 19920418; DE 69104374 D1 19941103; EP 0553141 A1 19930804; EP 0553141 B1 19940928; FI 931664 A0 19930414; FI 931664 A 19930414; NO 300901 B1 19970811; NO 931419 D0 19930416; NO 931419 L 19930416; PT 99243 A 19920831; PT 99243 B 19990430; US 5534115 A 19960709; ZA 918219 B 19920930
DOCDB simple family (application)
EP 9101906 W 19911004; AT 91917649 T 19911004; AU 8637191 A 19911004; BE 9000985 A 19901017; BR 9107000 A 19911004; CA 2094268 A 19911004; DE 69104374 T 19911004; EP 91917649 A 19911004; FI 931664 A 19930414; NO 931419 A 19930416; PT 9924391 A 19911016; US 3914693 A 19930415; ZA 918219 A 19911015