EP 0728238 A1 19960828 - 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)
Citation (search report)
See references of WO 9513420A1
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