Global Patent Index - EP 1969176 B1

EP 1969176 B1 20110216 - METHOD FOR CONTROLLING A PROCESS FOR THE PRODUCTION OF SHORT-FIBRED CELLULOSE PULP

Title (en)

METHOD FOR CONTROLLING A PROCESS FOR THE PRODUCTION OF SHORT-FIBRED CELLULOSE PULP

Title (de)

VERFAHREN ZUR STEUERUNG EINES VERFAHRENS ZUR HERSTELLUNG VON KURZFASERIGEM ZELLSTOFF

Title (fr)

PROCEDE DE CONTROLE D' UN PROCESSUS DE PRODUCTION DE PATE A PAPIER A COURTES FIBRES

Publication

EP 1969176 B1 20110216 (EN)

Application

EP 06835895 A 20061221

Priority

  • SE 2006001486 W 20061221
  • SE 0502899 A 20051223

Abstract (en)

[origin: WO2007073312A1] Special demands are placed on the properties of short-fibred cellulose pulp when this type of pulp is used for the manufacture of paper, and a paper manufacturer primarily desires a pulp with predictable and constant properties. The present invention makes possible the production of such pulp and consists of a method for the production of chemical pulp by the digestion of short-fibred lignocellulose material with the use of a certain ramping profile, a certain maximum temperature, a certain time at this maximum temperature, and certain content of cooking reagents, whereby the pulp in association with the end of the digestion is analysed with respect to at least two properties of the pulp fibres, one of which is constituted by the lignin content of these, and in that also the content of readily soluble carbohydrates in the pulp fibres is determined, which content has an influence on several properties of the pulp and of paper manufactured from the pulp and that control of the specified cooking parameters is based in the first hand, primarily, on the content of readily soluble carbohydrates and in the second hand, secondarily, on the content of lignin, and in this case, preferably, in a manner that is approximate while, however, always taking both contents into consideration.

IPC 8 full level

D21C 7/12 (2006.01); D21C 3/22 (2006.01)

CPC (source: EP SE)

D21C 3/228 (2013.01 - EP SE); D21C 7/12 (2013.01 - SE); D21C 3/02 (2013.01 - EP)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2007073312 A1 20070628; AT 498733 T 20110315; BR PI0620303 A2 20111108; CA 2632124 A1 20070628; DE 602006020182 D1 20110331; EP 1969176 A1 20080917; EP 1969176 A4 20091111; EP 1969176 B1 20110216; ES 2359163 T3 20110519; PT 1969176 E 20110511; SE 0502899 L 20070624; SE 529420 C2 20070807

DOCDB simple family (application)

SE 2006001486 W 20061221; AT 06835895 T 20061221; BR PI0620303 A 20061221; CA 2632124 A 20061221; DE 602006020182 T 20061221; EP 06835895 A 20061221; ES 06835895 T 20061221; PT 06835895 T 20061221; SE 0502899 A 20051223