EP 2276883 A4 20140402 - METHOD OF BLEACHING PULP WITH OZONE, CHLORINE DIOXIDE AND PEROXIDE
Title (en)
METHOD OF BLEACHING PULP WITH OZONE, CHLORINE DIOXIDE AND PEROXIDE
Title (de)
VERFAHREN ZUR PULPEBLEICHUNG MIT OZON, CHLORINDIOXID UND PEROXID
Title (fr)
PROCÉDÉ DE BLANCHIMENT DE PÂTE AVEC DE L'OZONE, DU DIOXYDE DE CHLORE ET DU PEROXYDE
Publication
Application
Priority
- SE 2009050422 W 20090423
- SE 0801074 A 20080513
Abstract (en)
[origin: WO2009139693A1] The present disclosure relates to a cost efficient method of bleaching a pulp by means of ozone. The method comprises subjecting an oxygen delignified pulp to an ozone bleaching stage followed by a chlorine dioxide bleaching stage and a peroxide bleaching stage. The peroxide bleaching stage is performed directly after the chlorine dioxide stage without any intermediate wash.
IPC 8 full level
D21C 9/10 (2006.01); D21C 9/14 (2006.01); D21C 9/153 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP SE)
D21C 9/10 (2013.01 - EP); D21C 9/1057 (2013.01 - SE); D21C 9/14 (2013.01 - EP); D21C 9/144 (2013.01 - SE); D21C 9/153 (2013.01 - EP); D21C 9/16 (2013.01 - EP)
Citation (search report)
- [I] JP 2005076150 A 20050324 - DAIO SEISHI KK
- [I] JP 2006083506 A 20060330 - MITSUBISHI GAS CHEMICAL CO
- See also references of WO 2009139693A1
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
DOCDB simple family (publication)
WO 2009139693 A1 20091119; CN 102027167 A 20110420; CN 102027167 B 20130612; EP 2276883 A1 20110126; EP 2276883 A4 20140402; JP 2011521116 A 20110721; JP 5478610 B2 20140423; SE 0801074 L 20091114; SE 532470 C2 20100202
DOCDB simple family (application)
SE 2009050422 W 20090423; CN 200980117590 A 20090423; EP 09746853 A 20090423; JP 2011509438 A 20090423; SE 0801074 A 20080513