EP 2438235 A1 20120411 - PROCESS FOR PRODUCING MECHANICAL PULP
Title (en)
PROCESS FOR PRODUCING MECHANICAL PULP
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HOLZSTOFF
Title (fr)
PROCÉDÉ POUR PRODUIRE UNE PÂTE MÉCANIQUE
Publication
Application
Priority
- EP 2010057288 W 20100527
- EP 09161636 A 20090602
- US 18327509 P 20090602
- EP 10724032 A 20100527
Abstract (en)
[origin: WO2010139589A1] The present invention relates to a process for preparing a high-yield pulp comprising a) treating a lignocellulose containing material chemically by means of an oxidising system comprising at least one non-enzymatic oxidant and an activator and optionally an alkali at a pH from about 2 to about 6.5; and b) treating the lignocellulose containing material mechanically in at least one mechanical treatment stage for a time sufficient to produce a high-yield pulp, wherein the lignocellulose containing material is chemically treated prior to and/or during at least one mechanical treatment stage, wherein the temperature of the lignocellulosic material before, during and/or after at least one mechanical treatment stage of the process ranges from about 45°C to about 200°C for a period of time ranging from about 1 second to about 5 hours and wherein oxidant is present: wherein oxidant is present: (i) after addition of alkali provided alkali is added to the oxidising system and/or (ii) after said at least one mechanical treatment stage.
IPC 8 full level
D21C 1/08 (2006.01)
CPC (source: EP)
D21C 1/08 (2013.01); D21C 1/04 (2013.01); D21C 1/06 (2013.01); D21C 3/222 (2013.01)
Citation (search report)
See references of WO 2010139589A1
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 SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2010057288 W 20100527; EP 10724032 A 20100527