EP 1062387 A1 20001227 - METHOD FOR BLEACHING AND/OR DELIGNIFICATION OF PAPER PULP
Title (en)
METHOD FOR BLEACHING AND/OR DELIGNIFICATION OF PAPER PULP
Title (de)
VERFAHREN ZUM BLEICHEN UND/ODER ZUR DELIGNIFIZIERUNG VON ZELLSTOFF
Title (fr)
PROCEDE DE BLANCHIMENT ET/OU DE DELIGNIFICATION DE PATES A PAPIER
Publication
Application
Priority
- BE 9800190 A 19980310
- EP 9901612 W 19990306
Abstract (en)
[origin: WO9946441A1] The invention concerns a method for bleaching and/or delignification of paper pulp using one or several peroxidized oxidants, which consists in pre-treating the paper pulp to a pH higher than 8 by means of one or several chelating agents selected among aspartic acid and its derivatives substituted on the nitrogen atom.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21C 9/1042 (2013.01); D21C 9/16 (2013.01)
Citation (search report)
See references of WO 9946441A1
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)
WO 9946441 A1 19990916; AU 3330599 A 19990927; BE 1011785 A3 20000111; EP 1062387 A1 20001227; ZA 991903 B 20001011
DOCDB simple family (application)
EP 9901612 W 19990306; AU 3330599 A 19990306; BE 9800190 A 19980310; EP 99914514 A 19990306; ZA 991903 A 19990309