EP 0212329 B1 19901010 - PROCESS FOR THE DELIGNIFICATION OF CELLULOSIC MATERIALS
Title (en)
PROCESS FOR THE DELIGNIFICATION OF CELLULOSIC MATERIALS
Publication
Application
Priority
US 76272685 A 19850805
Abstract (en)
[origin: EP0212329A1] 1. Process for the delignification of cellulosic materials characterized in that in a first step the cellulosic materials are treated with an acid under regulated conditions to effect a decontamination of the cellulosic materials of the metals which they contain, in a second step the cellulosic materials of the first step are treated with hydrogen peroxyde under alcaline conditions and in a third step the cellulosic materials of the second step are boiled in the presence of soda.
IPC 1-7
IPC 8 full level
D21C 1/00 (2006.01); D21C 1/04 (2006.01); D21C 1/08 (2006.01); D21C 3/00 (2006.01); D21C 3/02 (2006.01); D21C 3/26 (2006.01)
CPC (source: EP)
D21C 3/26 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0212329 A1 19870304; EP 0212329 B1 19901010; AT E57400 T1 19901015; AU 591509 B2 19891207; AU 6054486 A 19870212; BR 8603672 A 19870310; CA 1311093 C 19921208; DE 3674859 D1 19901115; ES 2000385 A6 19880216; FI 85726 B 19920214; FI 85726 C 19920525; FI 863194 A0 19860805; FI 863194 A 19870206; JP H0742670 B2 19950510; JP S6297992 A 19870507; NO 168490 B 19911118; NO 168490 C 19920226; NO 863133 D0 19860804; NO 863133 L 19870206; NZ 217002 A 19881129; PT 83118 A 19860901; PT 83118 B 19881014; YU 136986 A 19871031; YU 45351 B 19920528
DOCDB simple family (application)
EP 86110248 A 19860725; AT 86110248 T 19860725; AU 6054486 A 19860725; BR 8603672 A 19860804; CA 515193 A 19860801; DE 3674859 T 19860725; ES 8600840 A 19860804; FI 863194 A 19860805; JP 18326286 A 19860804; NO 863133 A 19860804; NZ 21700286 A 19860728; PT 8311886 A 19860801; YU 136986 A 19860731