EP 2534296 A1 20121219 - METHOD FOR PULP BLEACHING
Title (en)
METHOD FOR PULP BLEACHING
Title (de)
VERFAHREN ZUM BLEICHEN VON ZELLSTOFF
Title (fr)
PROCÉDÉ POUR LE BLANCHIMENT DE PÂTE À PAPIER
Publication
Application
Priority
- EP 10153474 A 20100212
- EP 2011052129 W 20110214
- EP 11703872 A 20110214
Abstract (en)
[origin: WO2011098599A1] A process for pulp bleaching is disclosed wherein an amino acid phosphonic acid is used together with a bleaching agent, pH regulants and pH buffers for pulp treatment in an aqueous medium. The bleaching agent can be represented by oxidative and reductive bleaching agents. The oxidative bleach treatment is conducted in alkaline medium whereas the reductive treatment is conducted in mildly acid medium.
IPC 8 full level
D21C 9/10 (2006.01); D21C 9/14 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP US)
D21C 9/1036 (2013.01 - EP US); D21C 9/14 (2013.01 - EP US); D21C 9/147 (2013.01 - EP US); D21C 9/163 (2013.01 - EP US)
Citation (search report)
See references of WO 2011098599A1
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 2011098599 A1 20110818; BR 112012020292 A2 20160503; CA 2789180 A1 20110818; EP 2534296 A1 20121219; JP 2013519801 A 20130530; RU 2012137954 A 20140320; US 2013042986 A1 20130221
DOCDB simple family (application)
EP 2011052129 W 20110214; BR 112012020292 A 20110214; CA 2789180 A 20110214; EP 11703872 A 20110214; JP 2012552422 A 20110214; RU 2012137954 A 20110214; US 201113577515 A 20110214