EP 0578303 B1 19960110 - Process for the delignification of a chemical paper pulp
Title (en)
Process for the delignification of a chemical paper pulp
Title (de)
Verfahren zur Delignifizierung von chemischen Zellstoffen
Title (fr)
Procédé pour la délignification d'une pâte à papier chimique
Publication
Application
Priority
US 90808392 A 19920706
Abstract (en)
[origin: EP0578303A1] Process for the delignification of a chemical paper pulp by means of an organic peroxyacid, according to which the unbleached pulp originating from the cooking operation is treated with an aqueous solution of this organic peroxyacid in which the hydrogen peroxide content does not exceed 20 % of the weight of the peroxyacid.
IPC 1-7
IPC 8 full level
IPC 8 main group level
D21C 1/00 (2006.01)
CPC (source: EP US)
D21C 9/163 (2013.01 - EP US); D21C 9/166 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR LI NL PT SE
DOCDB simple family (publication)
EP 0578303 A1 19940112; EP 0578303 B1 19960110; AT E132926 T1 19960115; AU 4170493 A 19940113; AU 666375 B2 19960208; BR 9302768 A 19940208; CA 2099828 A1 19940107; DE 69301285 D1 19960222; DE 69301285 T2 19960822; ES 2086183 T3 19960616; FI 933105 A0 19930706; FI 933105 A 19940107; JP H06108392 A 19940419; NZ 248082 A 19951221; SI 9300364 A 19940331; SK 70493 A3 19940202; US 5431781 A 19950711
DOCDB simple family (application)
EP 93201885 A 19930629; AT 93201885 T 19930629; AU 4170493 A 19930702; BR 9302768 A 19930705; CA 2099828 A 19930705; DE 69301285 T 19930629; ES 93201885 T 19930629; FI 933105 A 19930706; JP 16549493 A 19930705; NZ 24808293 A 19930706; SI 9300364 A 19930706; SK 70493 A 19930702; US 26419694 A 19940622