EP 2097582 A4 20131225 - A METHOD FOR MANUFACTURING MECHANICAL PULP
Title (en)
A METHOD FOR MANUFACTURING MECHANICAL PULP
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HOLZSTOFF
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE PULPE MÉCANIQUE
Publication
Application
Priority
- FI 2007050721 W 20071227
- FI 20065860 A 20061228
Abstract (en)
[origin: WO2008081078A1] The present invention relates to a method for manufacturing mechanical pulp, the method comprising -introducing raw material of the mechanical pulp, -refining the raw material in a first refining stage in order to form the mechanical pulp, -adjusting the pH of the mechanical pulp between 9 and 11 in aprocess step in which a first process delay is arranged, the first process delay being at least 0.5 hours, -sorting the mechanical pulp into a first accepted stock (A1) and a first rejected stock (R1), -ozonizing the first rejected stock (R1) whose pH at the start of the ozonation process is between 9 and 11, -refining the ozonated first rejected stock (R1) in a second refining stage so that at least a part of it will belong to a second accepted stock, and -combining the accepted stocks. The present invention also relates to the use of the mechanical pulp.
IPC 8 full level
D21B 1/16 (2006.01); D21C 9/153 (2006.01)
CPC (source: EP FI US)
D21B 1/16 (2013.01 - EP FI US); D21C 9/153 (2013.01 - EP US)
Citation (search report)
- [AD] CA 1083870 A 19800819 - MYRENS VERKSTED AS
- See references of WO 2008081078A1
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 MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008081078 A1 20080710; BR PI0707368 A2 20110503; CA 2633800 A1 20080628; CA 2633800 C 20110802; CN 101389808 A 20090318; CN 101389808 B 20110511; EP 2097582 A1 20090909; EP 2097582 A4 20131225; FI 119062 B 20080715; FI 20065860 A0 20061228; JP 2009530508 A 20090827; JP 4882090 B2 20120222; RU 2373313 C1 20091120; US 2011036523 A1 20110217
DOCDB simple family (application)
FI 2007050721 W 20071227; BR PI0707368 A 20071227; CA 2633800 A 20071227; CN 200780006960 A 20071227; EP 07858372 A 20071227; FI 20065860 A 20061228; JP 2009500882 A 20071227; RU 2008126954 A 20071227; US 15822207 A 20071227