EP 0712453 A1 19960522 - METHOD FOR OZONE BLEACHING PAPER PULP
Title (en)
METHOD FOR OZONE BLEACHING PAPER PULP
Title (de)
OZONBLEICHVERFAHREN UVON ZELLSTOFF
Title (fr)
PROCEDE DE BLANCHIMENT DE PATES A PAPIER PAR L'OZONE
Publication
Application
Priority
- FR 9400910 W 19940720
- FR 9308967 A 19930721
Abstract (en)
[origin: WO9503448A1] A method for ozone bleaching unbleached chemical paper pulp in a single ozone stage and in the presence of a tertiary alcohol including four to eight carbon atoms which is fed into the reaction medium at a temperature of - 5 DEG C to 80 DEG C prior to the actual ozone treatment stage, whereby the gas-liquid transfer, the exchange potentiality, the lignin oxidation selectivity and the ozone efficiency are improved, and the consitency of the treated pulp undergoing ozone treatment is between 6 and 60 %.
IPC 1-7
IPC 8 full level
D21C 9/10 (2006.01); D21C 9/153 (2006.01)
CPC (source: EP)
D21C 9/1036 (2013.01); D21C 9/153 (2013.01)
Citation (search report)
See references of WO 9503448A1
Designated contracting state (EPC)
DE ES FR PT SE
DOCDB simple family (publication)
FR 2708010 A1 19950127; FR 2708010 B1 19950922; BR 9407083 A 19960813; CA 2167605 A1 19950202; DE 69406457 D1 19971127; DE 69406457 T2 19980219; DE 712453 T1 19961024; EP 0712453 A1 19960522; EP 0712453 B1 19971022; ES 2086272 T1 19960701; ES 2086272 T3 19971216; FI 960297 A0 19960122; FI 960297 A 19960122; JP H09505357 A 19970527; WO 9503448 A1 19950202
DOCDB simple family (application)
FR 9308967 A 19930721; BR 9407083 A 19940720; CA 2167605 A 19940720; DE 69406457 T 19940720; DE 94922284 T 19940720; EP 94922284 A 19940720; ES 94922284 T 19940720; FI 960297 A 19960122; FR 9400910 W 19940720; JP 50497995 A 19940720