EP 0514608 B1 19940810 - Process for hydrogen peroxide bleaching of high-yield pulps.
Title (en)
Process for hydrogen peroxide bleaching of high-yield pulps.
Title (de)
Verfahren zum Wasserstoffperoxydbleichen von Hochausbeute-Zellstoffen.
Title (fr)
Procédé de blanchiment au peroxyde d'hydrogène de pâtes à papier à haut rendement.
Publication
Application
Priority
FR 9005748 A 19900430
Abstract (en)
[origin: FR2661430A1] Bleaching of high-yield paper pulps by means of sodium peroxide in alkaline medium, during which the only intervention is the modification of the alkalinity of the pulp by adding an alkaline agent at a time when 40 % to 75 % of the initial quantity of hydrogen peroxide has been consumed.
IPC 1-7
IPC 8 full level
D21C 9/16 (2006.01)
CPC (source: EP US)
D21C 9/163 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR GB IT SE
DOCDB simple family (publication)
FR 2661430 A1 19911031; FR 2661430 B1 19920717; AU 640775 B2 19930902; AU 7607191 A 19911107; CA 2041388 A1 19911031; CA 2041388 C 19990928; EP 0514608 A1 19921125; EP 0514608 B1 19940810; ES 2057804 T3 19941016; FI 912073 A0 19910429; FI 912073 A 19911031; FI 99153 B 19970630; FI 99153 C 19971010; JP H04228692 A 19920818; JP H0726352 B2 19950322; NO 177606 B 19950710; NO 177606 C 19951018; NO 911490 D0 19910416; NO 911490 L 19911031; NZ 237979 A 19930428; PT 97513 A 19920131; PT 97513 B 19980831; US 5169495 A 19921208
DOCDB simple family (application)
FR 9005748 A 19900430; AU 7607191 A 19910429; CA 2041388 A 19910429; EP 91401316 A 19910522; ES 91401316 T 19910522; FI 912073 A 19910429; JP 9560191 A 19910425; NO 911490 A 19910416; NZ 23797991 A 19910429; PT 9751391 A 19910429; US 69362991 A 19910430