EP 0430915 A1 19910605 - Procedure for the production pulp.
Title (en)
Procedure for the production pulp.
Title (de)
Verfahren zur Herstellung von Zellstoff.
Title (fr)
Procédé de fabrication de pâte de bois.
Publication
Application
Priority
FI 895676 A 19891127
Abstract (en)
The invention relates to a procedure for the production of mechanical pulp from a fibrous product. To reduce the refining energy, the fibrous product is subjected to an enzyme treatment in which an enzyme acts on the hemicellulose and/or cellulose in the fibrous product. When hydrolytic enzymes are used, it is preferable to use oxidation-reduction chemicals to adjust the redox potential to the optimum level characteristic of each hydrolytic enzyme. In addition to reducing the refining energy consumption, the enzyme treatment also improves the strength properties and the blue reflectance factor of the pulp. <IMAGE>
IPC 1-7
IPC 8 full level
C12S 3/08 (2006.01); D21B 1/02 (2006.01); D21B 1/14 (2006.01); D21C 3/22 (2006.01); D21C 5/00 (2006.01); D21C 9/00 (2006.01); D21C 9/10 (2006.01); D21D 1/20 (2006.01)
CPC (source: EP)
D21B 1/021 (2013.01); D21C 5/005 (2013.01)
Citation (search report)
- [X] FR 2557894 A1 19850712 - CENTRE TECH IND PAPIER [FR]
- [A] WO 8803190 A1 19880505 - CALL HANS PETER [DE]
- [XP] EP 0351655 A1 19900124 - CULTOR OY [FI]
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0430915 A1 19910605; CA 2030836 A1 19910528; FI 895676 A0 19891127; FI 895676 A 19910528; FI 92414 B 19940729; JP H03174079 A 19910729; NO 905134 D0 19901127; NO 905134 L 19910528
DOCDB simple family (application)
EP 90850385 A 19901126; CA 2030836 A 19901126; FI 895676 A 19891127; JP 32133990 A 19901127; NO 905134 A 19901127