EP 0892107 A1 19990120 - Preparation of mechanical wood pulps with reduced energy
Title (en)
Preparation of mechanical wood pulps with reduced energy
Title (de)
Herstellung von mechanischem Holzstoff mit reduziertem Energieverbrauch
Title (fr)
Préparation de pâtes méchaniques à partir de bois avec réduction d' energie
Publication
Application
Priority
US 5292497 P 19970717
Abstract (en)
A refiner mechanical pulp is produced employing a two stage refining operation with an interstage chemical treatment. Energy savings are achieved to substantiate the same overall pulp quality by employing a reduced application of energy in the first stage of refining having a maximum of about 0.75 MWh/odt of pulp.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21C 3/06 (2013.01); D21C 9/004 (2013.01)
Citation (search report)
- [DY] EP 0030778 A1 19810624 - QNS PAPER [CA]
- [Y] US 4145246 A 19790320 - GOHEEN DAVID W, et al
- [A] HAYNES J B ET AL: "IMPROVING TMP PULP PROPERTIES BY SULFONATION", TAPPI JOURNAL, vol. 71, no. 10, October 1988 (1988-10-01), pages 123 - 127, XP000025617
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0892107 A1 19990120; CA 2243228 A1 19990117; NO 983302 D0 19980716; NO 983302 L 19990118
DOCDB simple family (application)
EP 98305702 A 19980716; CA 2243228 A 19980715; NO 983302 A 19980716