EP 0627522 B1 19970409 - Improved process for the bleaching of mechanical pulps
Title (en)
Improved process for the bleaching of mechanical pulps
Title (de)
Verbessertes Verfahren zur Bleiche von Holzstoffen
Title (fr)
Procédé amélioré pour le blanchiment de pâtes à papier mécaniques
Publication
Application
Priority
DE 4317466 A 19930526
Abstract (en)
[origin: US5554258A] An improved process for bleaching pulps is disclosed in which the unbleached pulp is subject to flotation before bleaching and, if necessary, the circulating water is also purified of interfering compounds by flotation.
IPC 1-7
IPC 8 full level
C09K 23/18 (2022.01); D21C 9/00 (2006.01); D21C 9/10 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP US)
D21C 9/007 (2013.01 - EP US); D21C 9/1005 (2013.01 - EP US); D21C 9/163 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR LI SE
DOCDB simple family (publication)
US 5554258 A 19960910; AT E151479 T1 19970415; DE 4317466 A1 19941201; DE 59402342 D1 19970515; EP 0627522 A1 19941207; EP 0627522 B1 19970409; FI 108947 B 20020430; FI 942424 A0 19940525; FI 942424 A 19941127
DOCDB simple family (application)
US 23874694 A 19940505; AT 94101156 T 19940127; DE 4317466 A 19930526; DE 59402342 T 19940127; EP 94101156 A 19940127; FI 942424 A 19940525