EP 0687322 A1 19951220 - CHEMICAL PAPER PULP DELIGNIFICATION METHOD
Title (en)
CHEMICAL PAPER PULP DELIGNIFICATION METHOD
Title (de)
VERFAHREN ZUR DELIGNIFIZIERUNG VON EINEM CHEMISCHEN ZELLSTOFF
Title (fr)
PROCEDE POUR LA DELIGNIFICATION D'UNE PATE A PAPIER CHIMIQUE
Publication
Application
Priority
- BE 9300196 A 19930302
- EP 9400546 W 19940224
Abstract (en)
[origin: WO9420674A1] A chemical paper pulp delignification method comprising a series of chlorinated reagent-free steps, i.e. an oxygen treatment step, a pulp decontamination step using a metal ion sequestering agent, an alkaline hydrogen peroxide treatment step and a peroxyacid treatment step.
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); D21C 9/166 (2013.01)
Citation (search report)
See references of WO 9420674A1
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL PT SE
DOCDB simple family (publication)
WO 9420674 A1 19940915; AU 6206094 A 19940926; BE 1006881 A3 19950117; BR 9405943 A 19960206; CA 2157291 A1 19940915; EP 0687322 A1 19951220; FI 954113 A0 19950901; FI 954113 A 19951004; JP H08507332 A 19960806; NO 953440 D0 19950901; NO 953440 L 19951101; ZA 941468 B 19940927
DOCDB simple family (application)
EP 9400546 W 19940224; AU 6206094 A 19940224; BE 9300196 A 19930302; BR 9405943 A 19940224; CA 2157291 A 19940224; EP 94909058 A 19940224; FI 954113 A 19950901; JP 51953094 A 19940224; NO 953440 A 19950901; ZA 941468 A 19940302