EP 0351330 B1 19980930 - Process for manufacturing bleached chemithermomechanical pulps
Title (en)
Process for manufacturing bleached chemithermomechanical pulps
Title (de)
Verfahren zur Herstellung von gebleichten chemithermomechanischen Zellstoffen
Title (fr)
Procédé de fabrication de pâtes chimicothermomécaniques blanchies
Publication
Application
Priority
FR 8809703 A 19880712
Abstract (en)
[origin: EP0351330A1] Process for manufacturing bleached CTMP pulps comprising a treatment of the lignocellulosic stock with sulphite at a temperature of at least 100 DEG C under saturated steam pressure, and a bleaching operation with the aid of H2O2 in alkaline medium without removal of solid or liquid matter from the pulp from the start of the treatment until the end of the bleaching.
IPC 1-7
IPC 8 full level
D21B 1/14 (2006.01); D21C 3/04 (2006.01); D21C 3/06 (2006.01); D21C 3/22 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP)
D21C 3/06 (2013.01); D21C 9/163 (2013.01)
Citation (examination)
- International Sulfite Pulping Conference 1982; Tappi Proceedings; H.Krüger et al; Bleaching of sulfite pups with peroxide and oxygen, possibilities and limitation, Tappi proceedings, pages 143
- TMP Survey, Pulp & Paper, July 1978, pages 99-110
- The Joint Textbook Committee of the Paper Industry, Pulp and Paper Manufacture; Vol. 2; Third Edition, 1987; R.Barton et al; Mechanical Pulping; pages 99-111, 155, 157
Designated contracting state (EPC)
AT BE DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0351330 A1 19900117; EP 0351330 B1 19980930; AT E171741 T1 19981015; AU 3799989 A 19900118; AU 616541 B2 19911031; CA 1335406 C 19950502; DE 351330 T1 19900613; DE 68928822 D1 19981105; DE 68928822 T2 19990527; ES 2012324 A4 19900316; ES 2012324 T3 19981116; FI 893372 A0 19890711; FI 893372 A 19900113; FI 96522 B 19960329; FI 96522 C 19960710; FR 2634233 A1 19900119; FR 2634233 B1 19950414; JP H0250236 B2 19901101; JP H0268377 A 19900307; NO 176726 B 19950206; NO 176726 C 19950516; NO 892805 D0 19890706; NO 892805 L 19900115; NZ 229902 A 19910925; PT 91128 A 19900208; PT 91128 B 19941230
DOCDB simple family (application)
EP 89420245 A 19890706; AT 89420245 T 19890706; AU 3799989 A 19890711; CA 605392 A 19890711; DE 68928822 T 19890706; DE 89420245 T 19890706; ES 89420245 T 19890706; FI 893372 A 19890711; FR 8809703 A 19880712; JP 18011389 A 19890712; NO 892805 A 19890706; NZ 22990289 A 19890711; PT 9112889 A 19890711