EP 0728238 B2 20040811 - METHOD OF BLEACHING CHEMICAL PAPER PULP
Title (en)
METHOD OF BLEACHING CHEMICAL PAPER PULP
Title (de)
VERFAHREN ZUM BLEICHEN VON ZELLSTOFF
Title (fr)
PROCEDE POUR LE BLANCHIMENT D'UNE PATE A PAPIER CHIMIQUE
Publication
Application
Priority
- BE 9301251 A 19931110
- EP 9403590 W 19941028
Abstract (en)
[origin: WO9513420A1] Method of bleaching chemical paper pulp having undergone extensive cooking, involving a sequence of processing steps carried out without chlorine reagents. The pulp is subjected to decontamination from its transition metals and then to a step using alkaline hydrogen peroxide.
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 9513420 A1 19950518; AT E175738 T1 19990115; AU 7993994 A 19950529; BE 1007757 A3 19951017; BR 9408027 A 19961217; CA 2176246 A1 19950518; DE 69416000 D1 19990225; EP 0728238 A1 19960828; EP 0728238 B1 19990113; EP 0728238 B2 20040811; ES 2129142 T3 19990601; ES 2129142 T5 20050401; FI 961975 A0 19960509; FI 961975 A 19960709; JP H10500178 A 19980106; MA 23369 A1 19950701; NO 961889 D0 19960509; NO 961889 L 19960509; ZA 948563 B 19950630
DOCDB simple family (application)
EP 9403590 W 19941028; AT 94931025 T 19941028; AU 7993994 A 19941028; BE 9301251 A 19931110; BR 9408027 A 19941028; CA 2176246 A 19941028; DE 69416000 T 19941028; EP 94931025 A 19941028; ES 94931025 T 19941028; FI 961975 A 19960509; JP 51356595 A 19941028; MA 23693 A 19941109; NO 961889 A 19960509; ZA 948563 A 19941031