EP 0587822 B1 19950830 - PROCESS FOR BLEACHING AND DELIGNIFYING CHEMICAL PAPER PULP.
Title (en)
PROCESS FOR BLEACHING AND DELIGNIFYING CHEMICAL PAPER PULP.
Title (de)
VERFAHREN ZUM BLEICHEN UND ZUR DELIGNIFIZIERUNG VON CHEMISCHEN PAPIERZELLSTOFFEN.
Title (fr)
PROCEDE POUR BLANCHIMENT ET LA DELIGNIFICATION DE PATES A PAPIER CHIMIQUES.
Publication
Application
Priority
- BE 9100549 A 19910606
- EP 9201222 W 19920601
Abstract (en)
[origin: WO9221814A1] Process for bleaching and delignifying chemical paper pulp in three stages: a first stage in which the pulp is subjected to gaseous oxygen, followed by two stages in which gaseous ozone and peroxymonosulphuric acid or one of its salts are used in any order.
IPC 1-7
IPC 8 full level
D21C 9/10 (2006.01); D21C 9/147 (2006.01); D21C 9/153 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP)
D21C 9/1057 (2013.01); D21C 9/147 (2013.01); D21C 9/153 (2013.01); D21C 9/166 (2013.01)
Designated contracting state (EPC)
AT BE DE ES FR SE
DOCDB simple family (publication)
WO 9221814 A1 19921210; AR 247257 A1 19941130; AT E127179 T1 19950915; AU 1877592 A 19930108; AU 651462 B2 19940721; BE 1004974 A3 19930309; BR 9206112 A 19951010; CA 2110698 A1 19921210; DE 69204457 D1 19951005; DE 69204457 T2 19960418; EP 0587822 A1 19940323; EP 0587822 B1 19950830; ES 2079209 T3 19960101; FI 935422 A0 19931203; FI 935422 A 19940111; JP H06507683 A 19940901; NO 302129 B1 19980126; NO 934406 D0 19931203; NO 934406 L 19940126; NZ 242996 A 19950127; YU 48264 B 19970930; YU 58792 A 19940909; ZA 924021 B 19930224
DOCDB simple family (application)
EP 9201222 W 19920601; AR 32245592 A 19920602; AT 92924472 T 19920601; AU 1877592 A 19920601; BE 9100549 A 19910606; BR 9206112 A 19920601; CA 2110698 A 19920601; DE 69204457 T 19920601; EP 92924472 A 19920601; ES 92924472 T 19920601; FI 935422 A 19931203; JP 51014192 A 19920601; NO 934406 A 19931203; NZ 24299692 A 19920603; YU 58792 A 19920605; ZA 924021 A 19920602