EP 2286024 A1 20110223 - PROCESS FOR THE BLEACHING OF PAPER PULP
Title (en)
PROCESS FOR THE BLEACHING OF PAPER PULP
Title (de)
VERFAHREN ZUM BLEICHEN VON PAPIERZELLSTOFF
Title (fr)
PROCÉDÉ DE BLANCHIMENT DE LA PÂTE À PAPIER
Publication
Application
Priority
- EP 2009056278 W 20090525
- EP 08156934 A 20080526
- EP 09753845 A 20090525
Abstract (en)
[origin: EP2128331A1] Process for the bleaching of paper pulp in which an aqueous suspension of paper pulp is subjected to a bleaching treatment with hydrogen peroxide in the presence of magnesium hydroxide and of at least one poly-±-hydroxyacrylic acid, its salt or their mixture.
IPC 8 full level
D21C 9/16 (2006.01)
CPC (source: EP US)
D21C 9/163 (2013.01 - EP US); D21C 9/1036 (2013.01 - EP US); D21C 9/1042 (2013.01 - EP US)
Citation (search report)
See references of WO 2009144190A1
Designated contracting state (EPC)
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 SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2128331 A1 20091202; CA 2723311 A1 20091203; EP 2286024 A1 20110223; US 2011067831 A1 20110324; WO 2009144190 A1 20091203
DOCDB simple family (application)
EP 08156934 A 20080526; CA 2723311 A 20090525; EP 09753845 A 20090525; EP 2009056278 W 20090525; US 99231609 A 20090525