EP 1688535 A1 20060809 - Method for removing unsaturated uronic acid in chemical pulp for papermaking
Title (en)
Method for removing unsaturated uronic acid in chemical pulp for papermaking
Title (de)
Verfahren zur Entfernung von ungesättigter Uronsäure in chemischen Zellstoff für Papierherstellung
Title (fr)
Méthode d'élimination de l'acide uronique insaturé de pates chimiques pour la production de papier
Publication
Application
Priority
JP 2005032317 A 20050208
Abstract (en)
The present invention provides a method for removing unsaturated uronic acid contained in chemical pulp for papel-niaking, characterized by adding glucuronidase. According to the preferred embodiment of the present invention, in an ECF or TCF bleaching method using no molecular chlorine, unsaturated uronic acid can be reduced while controlling a bleaching cost, and a brightness reversion property of pulp can be improved.
IPC 8 full level
D21C 5/00 (2006.01); D21H 17/22 (2006.01); D21C 9/147 (2006.01)
CPC (source: EP US)
D21C 5/005 (2013.01 - EP US); D21H 17/22 (2013.01 - EP US); D21C 9/147 (2013.01 - EP US)
Citation (applicant)
- JP H05247865 A 19930924 - JUJO PAPER CO LTD
- TAPPI JOURNAL, vol. 2, no. 5, May 2003 (2003-05-01)
- TAPPI JOURNAL, vol. 2, no. 5, May 2003 (2003-05-01)
- PAPEHI JA PUU-PAPER AND TIMBER, vol. 86, no. 1, 2004
- PAPEHI JA PUU-PAPER AND TIMBER, vol. 86, no. 1, 2004
- RESEARCH REPORT OF FORESTRY AND FOREST PRODUCTS RESEARCH INSTITUTE, no. 359, pages 141 - 157
- RESEARCH REPORT OF FORESTRY AND FOREST PRODUCTS RESEARCH INSTITUTE, no. 359, pages 141 - 157
Citation (search report)
- [X] WO 9311296 A1 19930610 - VALTION TEKNILLINEN [FI]
- [X] US 2004069426 A1 20040415 - SIIKA-AHO MATTI [FI], et al
- [X] WO 9118978 A1 19911212 - VALTION TEKNILLINEN [FI]
- [A] US 2003148453 A1 20030807 - MANTYLA ARJA [FI], et al
- [A] WO 9203541 A1 19920305 - VALTION TEKNILLINEN [FI]
- [A] US 5837515 A 19981117 - SUOMINEN PIRKKO [FI], et al
- [A] WO 9414965 A1 19940707 - GIST BROCADES NV [NL], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1688535 A1 20060809; BR PI0600247 A 20061003; CA 2535519 A1 20060808; JP 2006219767 A 20060824; US 2006177921 A1 20060810
DOCDB simple family (application)
EP 06002054 A 20060201; BR PI0600247 A 20060207; CA 2535519 A 20060207; JP 2005032317 A 20050208; US 34732406 A 20060206