EP 3066257 B1 20190306 - METHOD FOR DELIGNIFYING AND BLEACHING PULP
Title (en)
METHOD FOR DELIGNIFYING AND BLEACHING PULP
Title (de)
VERFAHREN ZUR DELIGNIFIZIERUNG UND BLEICHE VON ZELLSTOFF
Title (fr)
PROCÉDÉ DE DÉLIGNIFICATION ET DE BLANCHIMENT
Publication
Application
Priority
- DE 102013222468 A 20131106
- EP 2014072096 W 20141015
Abstract (en)
[origin: WO2015067446A1] Method for delignifying and bleaching pulp, comprising a first bleaching stage using hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture, followed by a second bleaching stage using hydrogen peroxide in an alkaline aqueous mixture, and followed by a third bleaching stage using hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture.
IPC 8 full level
D21C 3/00 (2006.01); D21C 3/02 (2006.01); D21C 9/10 (2006.01); D21C 9/147 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP KR US)
D21C 3/00 (2013.01 - EP KR US); D21C 3/026 (2013.01 - US); D21C 9/10 (2013.01 - EP KR US); D21C 9/1036 (2013.01 - EP KR US); D21C 9/1042 (2013.01 - EP KR US); D21C 9/1057 (2013.01 - EP KR US); D21C 9/147 (2013.01 - EP KR US); D21C 9/16 (2013.01 - EP KR US); D21C 9/163 (2013.01 - EP KR US); D21C 9/166 (2013.01 - EP KR US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2015067446 A1 20150514; AR 098317 A1 20160526; AU 2014345837 A1 20160428; AU 2014345837 B2 20180118; CA 2929443 A1 20150514; CL 2016001088 A1 20160930; CN 105723028 A 20160629; EP 3066257 A1 20160914; EP 3066257 B1 20190306; ES 2724323 T3 20190910; KR 20160085281 A 20160715; PT 3066257 T 20190604; RU 2016122102 A 20171211; RU 2016122102 A3 20180620; US 10006169 B2 20180626; US 2016298294 A1 20161013; UY 35820 A 20150529
DOCDB simple family (application)
EP 2014072096 W 20141015; AR P140104164 A 20141105; AU 2014345837 A 20141015; CA 2929443 A 20141015; CL 2016001088 A 20160506; CN 201480060946 A 20141015; EP 14786164 A 20141015; ES 14786164 T 20141015; KR 20167014927 A 20141015; PT 14786164 T 20141015; RU 2016122102 A 20141015; US 201415034453 A 20141015; UY 35820 A 20141105