EP 2140064 A1 20100106 - A METHOD FOR REDUCING THE ENERGY CONSUMPTION AT THE REFINING OF A PULP SUSPENSION IN A PAPERMAKING PROCESS AND USE OF SODIUM BICARBONATE IN PAPERMAKING
Title (en)
A METHOD FOR REDUCING THE ENERGY CONSUMPTION AT THE REFINING OF A PULP SUSPENSION IN A PAPERMAKING PROCESS AND USE OF SODIUM BICARBONATE IN PAPERMAKING
Title (de)
VERFAHREN ZUR REDUZIERUNG DES STROMVERBRAUCHS BEI DER VERFEINERUNG EINER ZELLSTOFFSUSPENSION IN EINEM PAPIERHERSTELLUNGSVERFAHREN UND VERWENDUNG VON NATRIUMBICARBONAT BEI DER PAPIERHERSTELLUNG
Title (fr)
PROCÉDÉ DESTINÉ À RÉDUIRE LA CONSOMMATION D'ÉNERGIE LORS DU RAFFINAGE D'UNE PÂTE EN SUSPENSION DANS UN PROCESSUS DE FABRICATION DE PAPIER ET UTILISATION DE BICARBONATE DE SODIUM POUR LA FABRICATION DU PAPIER
Publication
Application
Priority
- EP 2008055340 W 20080430
- FI 20075301 A 20070430
Abstract (en)
[origin: WO2008132228A1] The invention relates to a method for reducing the energy consumption at the refining of a pulp suspension in a papermaking process. The reducing of the e nergy consumption is provided by treating said pulp suspension with non-stoichiometric sodium bicarbonate. Due to the treatment with sodium bicarbonate the calcium hardness value of the said pulp suspension is decreased to a level having an advantageous ef fect on the energy consumption and at the same time the pH value is adjusted and maintained at the desired level in the refining and preferably also throughout the subsequent paper making. The invention also relates to use of non-stoichiometric sodium bica rbonate in the papermaking process.
IPC 8 full level
D21B 1/16 (2006.01); D21C 9/00 (2006.01); D21H 17/67 (2006.01); D21H 17/70 (2006.01)
CPC (source: EP FI)
D21B 1/16 (2013.01 - EP FI); D21C 3/02 (2013.01 - EP); D21C 9/004 (2013.01 - FI); D21D 1/20 (2013.01 - EP FI); D21H 17/67 (2013.01 - EP FI); D21H 17/70 (2013.01 - EP)
Citation (search report)
See references of WO 2008132228A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008132228 A1 20081106; EP 2140064 A1 20100106; FI 120651 B 20100115; FI 20075301 A0 20070430; FI 20075301 A 20081031
DOCDB simple family (application)
EP 2008055340 W 20080430; EP 08749924 A 20080430; FI 20075301 A 20070430