EP 0447673 B1 19950308 - Process of enzymatic bleaching of pulp.
Title (en)
Process of enzymatic bleaching of pulp.
Title (de)
Verfahren zum enzymatischen Bleichen von Zellstoffen.
Title (fr)
Procédé pour le blanchiment enzymatique de pâtes.
Publication
Application
Priority
DE 4008893 A 19900320
Abstract (en)
[origin: EP0447673A1] The present invention concerns a process for the enzymatic bleaching of celluloses in which a) a redox potential in the range between 200 and 500 mV is set with the simultaneous dosed addition of oxidation and reducing agents and the addition of salts and complex formers to provide an aqueous cellulose-containing solution; b) a bleaching reaction is initiated by the addition of lignolytic enzymes; and c) the reaction is maintained for 15 minutes to 12 hours under continuous agitation.
IPC 1-7
IPC 8 full level
C12S 3/08 (2006.01); C12S 3/04 (2006.01); D21C 5/00 (2006.01); D21C 9/10 (2006.01); D21C 9/147 (2006.01); D21C 9/153 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP)
D21C 5/005 (2013.01); D21C 9/1084 (2013.01); D21C 9/1089 (2013.01); D21C 9/147 (2013.01); D21C 9/153 (2013.01); D21C 9/163 (2013.01)
Citation (examination)
J.P. Casey "Pulp and Paper; Chemistry and Chemical Technology" dritte Auflage, Band I, 1980, John Wiley & Sons, New York, Seiten 651, 652.
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0447673 A1 19910925; EP 0447673 B1 19950308; AT E119593 T1 19950315; AU 641494 B2 19930923; AU 7543291 A 19911021; BR 9106411 A 19930504; CA 2078345 A1 19910921; DE 4008893 A1 19910926; DE 4008893 C2 19920903; DE 59008655 D1 19950413; DK 0447673 T3 19950724; ES 2072965 T3 19950801; FI 924169 A0 19920917; FI 924169 A 19920917; HU 9202982 D0 19930128; HU T64119 A 19931129; JP H05505857 A 19930826; NO 180388 B 19961230; NO 180388 C 19970409; NO 923601 D0 19920916; NO 923601 L 19920916; WO 9114823 A1 19911003
DOCDB simple family (application)
EP 90125380 A 19901222; AT 90125380 T 19901222; AU 7543291 A 19910319; BR 9106411 A 19910319; CA 2078345 A 19910319; DE 4008893 A 19900320; DE 59008655 T 19901222; DK 90125380 T 19901222; EP 9100540 W 19910319; ES 90125380 T 19901222; FI 924169 A 19920917; HU P9202982 A 19910319; JP 50630691 A 19910319; NO 923601 A 19920916