EP 0351330 A1 19900117 - 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)
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.
Abstract (fr)
Procédé de fabrication de pâtes CTMP blanchies comprenant un traitement de la matière lignocellulosique avec le sulfite à température au moins égale à 100°C sous pression de vapeur d'eau saturée, et un blanchiment à l'aide de H2O2 en milieu alcalin, sans élimination de matière solide ou liquide de la pâte depuis le début du traitement jusqu'à la fin du blanchiment.
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 (search report)
- [X] EP 0172135 A1 19860219 - VIT RUDY [CA], et al
- [A] FR 1389308 A 19650212 - FMC CORP
- [A] DE 834808 C 19520324 - DEGUSSA
- [A] FR 2389712 A1 19781201 - MO OCH DOMSJOE AB [SE]
- [AD] US 4718980 A 19880112 - LOWRIE LEONARD E [US], et al
- [A] TAPPI JOURNAL, vol. 68, no. 2, février 1985, pages 64-68, Easton, Pennsylvania, US; N. JACKSON et al.: "Chemithermomechanical pulp production and end-uses in Scandinavia"
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