EP 2025807 A1 20090218 - Method to recover chemicals in mechanical pulping
Title (en)
Method to recover chemicals in mechanical pulping
Title (de)
Verfahren zur Wiederherstellung von Chemikalien beim mechanischen Aufschluss
Title (fr)
Procédé de récupération de produits chimiques dans une mise en pâte mécanique
Publication
Application
Priority
EP 07397025 A 20070725
Abstract (en)
The present invention refers to a method to recover chemicals in mechanical pulping by evaporating mechanical pulping or recycled fibre plant effluent and burning the received concentrate under oxidative atmosphere to yield sodium carbonate. According to the invention said sodium carbonate is dissolved into water together with CaO in order to convert said sodium carbonate into sodium hydroxide at least partly.
IPC 8 full level
D21C 11/00 (2006.01)
CPC (source: EP US)
D21C 11/0064 (2013.01 - EP US); D21C 9/10 (2013.01 - EP US); D21C 11/10 (2013.01 - EP US); D21C 11/122 (2013.01 - EP US)
Citation (search report)
- [YD] US 2005150440 A1 20050714 - TANNER TEEMU [FI]
- [Y] EP 1777338 A1 20070425 - KVAERNER POWER OY [FI]
- [Y] EP 1566480 A1 20050824 - NIPPON RENSUI KK [JP], et al
- [Y] US 2007051482 A1 20070308 - OLSEN GARY A [US], et al
- [Y] US 2006201641 A1 20060914 - HARRIS ANDREW T [AU], et al
- [Y] EP 0633351 A1 19950111 - DOMTAR INC [CA]
- [A] WO 9723687 A1 19970703 - COMBUSTION ENG [US]
- [A] WO 9737944 A1 19971016 - POEYRY JAAKKO & CO OY [FI], et al
Designated contracting state (EPC)
AT SE
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 07397025 A 20070725; US 88903007 A 20070808