EP 0726979 A1 19960821 - PROCESS FOR BLEACHING A CHEMICAL PULP
Title (en)
PROCESS FOR BLEACHING A CHEMICAL PULP
Title (de)
VERFAHREN ZUM BLEICHEN VON ZELLSTOFF
Title (fr)
PROCEDE POUR LE BLANCHIMENT D'UNE PATE A PAPIER CHIMIQUE
Publication
Application
Priority
- BE 9301215 A 19931104
- EP 9403591 W 19941028
Abstract (en)
[origin: WO9512709A1] Process for bleaching a chemical pulp through a sequence of processing steps comprising, in this order, a step for decontaminating the pulp by removing its transition metals, an alcaline hydrogen peroxide processing step and a processing step using a non peroxygenated acid.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21C 9/1042 (2013.01); D21C 9/1057 (2013.01); D21C 9/163 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR LI PT SE
DOCDB simple family (publication)
WO 9512709 A1 19950511; AT E166118 T1 19980515; AU 7994094 A 19950523; BE 1007700 A3 19951003; BR 9407976 A 19961203; CA 2175817 A1 19950511; DE 69410286 D1 19980618; DE 69410286 T2 19981210; EP 0726979 A1 19960821; EP 0726979 B1 19980513; ES 2119234 T3 19981001; FI 961895 A0 19960503; FI 961895 A 19960503; JP H09507096 A 19970715; MA 23365 A1 19950701; NO 961817 D0 19960503; NO 961817 L 19960503; NZ 274852 A 19970424; ZA 948562 B 19950630
DOCDB simple family (application)
EP 9403591 W 19941028; AT 94931026 T 19941028; AU 7994094 A 19941028; BE 9301215 A 19931104; BR 9407976 A 19941028; CA 2175817 A 19941028; DE 69410286 T 19941028; EP 94931026 A 19941028; ES 94931026 T 19941028; FI 961895 A 19960503; JP 51301595 A 19941028; MA 23689 A 19941104; NO 961817 A 19960503; NZ 27485294 A 19941028; ZA 948562 A 19941031