EP 2430233 B1 20130508 - METHOD FOR PRODUCING PULP
Title (en)
METHOD FOR PRODUCING PULP
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PULPE
Title (fr)
PROCEDE DE PRODUCTION DE PATE A PAPIER
Publication
Application
Priority
- FI 2011050206 W 20110310
- FI 20105243 A 20100311
Abstract (en)
[origin: WO2011110746A1] A method for producing pulp is disclosed. More particularly, the invention concerns a displacement batch cooking process comprising a steam-phase prehydrolysis step, wherein the recovery of the by-products is improved. In the recovery step of the present invention, after the target P-factor in the prehydrolysis stage is reached, hot washing liquid is introduced into the digester from the bottom thereof. The washing liquid is circulated via the suction screens to the top and to the bottom of the digester until the prehydrolyzed chips are under the washing liquid. The hot washing liquid containing by-products is recovered from the digester and the digester contents are neutralized by displacing the washing liquid with alkaline liquor.
IPC 8 full level
D21C 11/00 (2006.01)
CPC (source: EP FI)
D21C 1/02 (2013.01 - FI); D21C 11/00 (2013.01 - FI); D21C 11/0007 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011110746 A1 20110915; CA 2761757 A1 20110915; CA 2761757 C 20171010; CN 102472006 A 20120523; CN 102472006 B 20141022; EP 2430233 A1 20120321; EP 2430233 B1 20130508; FI 123100 B 20121115; FI 20105243 A0 20100311; FI 20105243 L 20110912
DOCDB simple family (application)
FI 2011050206 W 20110310; CA 2761757 A 20110310; CN 201180002449 A 20110310; EP 11713494 A 20110310; FI 20105243 A 20100311