EP 0759105 A1 19970226 - METHOD FOR PREPARING DELIGNIFIED AND BLEACHED CHEMICAL PAPER PULPS
Title (en)
METHOD FOR PREPARING DELIGNIFIED AND BLEACHED CHEMICAL PAPER PULPS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON DELIGNIFIZIERTEN UND GEBLEICHTEN CHEMISCHEN ZELLSTOFFEN
Title (fr)
PROCEDE DE PREPARATION DE PATES A PAPIER CHIMIQUES DELIGNIFIEES ET BLANCHIES
Publication
Application
Priority
- FR 9500494 W 19950414
- FR 9405815 A 19940511
Abstract (en)
[origin: WO9531599A1] A method wherein a cooked lignocellulose pulp is (a) delignified using oxygen, (b) processed with a transition metal complexing or sequestering agent and washed, and (c) processed with hydrogen peroxide in the presence of an alkali metal silicate at a temperature of over 100 DEG C and at a pressure of 5-200 bar.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
D21C 9/1026 (2013.01 - EP US); D21C 9/1042 (2013.01 - EP US); D21C 9/163 (2013.01 - EP US)
Citation (search report)
See references of WO 9531599A1
Designated contracting state (EPC)
ES FR SE
DOCDB simple family (publication)
WO 9531599 A1 19951123; AU 2348495 A 19951205; CA 2189796 A1 19951123; CA 2189796 C 20000822; CN 1065304 C 20010502; CN 1147841 A 19970416; EP 0759105 A1 19970226; EP 0759105 B1 19981202; EP 0759105 B2 20011010; ES 2126278 T3 19990316; ES 2126278 T5 20020216; FI 117394 B 20060929; FI 964499 A0 19961108; FI 964499 A 19961108; FR 2719854 A1 19951117; FR 2719854 B1 19960621; NO 320946 B1 20060220; NO 964609 D0 19961031; NO 964609 L 19961031; US 6019870 A 20000201
DOCDB simple family (application)
FR 9500494 W 19950414; AU 2348495 A 19950414; CA 2189796 A 19950414; CN 95192987 A 19950414; EP 95917403 A 19950414; ES 95917403 T 19950414; FI 964499 A 19961108; FR 9405815 A 19940511; NO 964609 A 19961031; US 73768497 A 19970117