EP 0464110 B1 19940608 - BLEACHING PROCESS FOR THE PRODUCTION OF HIGH BRIGHT PULPS.
Title (en)
BLEACHING PROCESS FOR THE PRODUCTION OF HIGH BRIGHT PULPS.
Title (de)
BLEICHVERFAHREN ZUR HERSTELLUNG VON HOCHWEISSEM ZELLSTOFF.
Title (fr)
PROCEDE DE BLANCHIMENT SERVANT A LA PRODUCTION DE PULPES TRES CLAIRES.
Publication
Application
Priority
- CA 594763 A 19890323
- CA 9000097 W 19900322
Abstract (en)
[origin: WO9011403A1] A process for the bleaching of mechanical and chemimechanical pulps which includes the steps of treating in a first stage the pulp with a reducing agent and subsequently treating the same pulp with a peroxygen compound in a second stage followed by a subsequent treatment with a peroxygen compound in a third stage.
IPC 1-7
IPC 8 full level
D21C 9/10 (2006.01)
CPC (source: EP)
D21C 9/1057 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9011403 A1 19901004; AT E106961 T1 19940615; CA 1340348 C 19990126; DE 69009750 D1 19940714; EP 0464110 A1 19920108; EP 0464110 B1 19940608
DOCDB simple family (application)
CA 9000097 W 19900322; AT 90905400 T 19900322; CA 594763 A 19890323; DE 69009750 T 19900322; EP 90905400 A 19900322