EP 0348411 B1 19921202 - AN IMPROVED PEROXIDE BLEACHING METHOD
Title (en)
AN IMPROVED PEROXIDE BLEACHING METHOD
Publication
Application
Priority
- CA 612006 A 19890919
- SE 8700569 A 19870212
Abstract (en)
[origin: WO8806202A1] A method for bleaching wood pulp without the use of peroxy acids by means of from 0.1 to 10 %, based on the dry weight of the pulp, of hydrogen peroxide characterized in that an organic acid selected from the group formic acid, acetic acid, lactic acid, maleic acid and phtalic acid or any mixture thereof is added together with such an amount of an alkali hydroxide to the pulp suspension to be bleached as to give a pH-value of the suspension within the alkaline range of from 8.0 to 13.
IPC 1-7
IPC 8 full level
D21C 9/16 (2006.01)
CPC (source: EP)
D21C 9/163 (2013.01)
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
WO 8806202 A1 19880825; AT E83016 T1 19921215; CA 1333650 C 19941227; DE 3876429 D1 19930114; DE 3876429 T2 19930701; EP 0348411 A1 19900103; EP 0348411 B1 19921202; FI 893742 A0 19890808; FI 91545 B 19940331; FI 91545 C 19940711; SE 8700569 D0 19870212
DOCDB simple family (application)
SE 8800055 W 19880212; AT 88901957 T 19880212; CA 612006 A 19890919; DE 3876429 T 19880212; EP 88901957 A 19880212; FI 893742 A 19890808; SE 8700569 A 19870212