EP 0226114 B1 19900711 - PROCESS FOR BLEACHING AND DELIGNIFICATION OF CELLULOSIC PRODUCTS
Title (en)
PROCESS FOR BLEACHING AND DELIGNIFICATION OF CELLULOSIC PRODUCTS
Publication
Application
Priority
DE 3544398 A 19851216
Abstract (en)
1. Process for the bleaching and delignifying of cellulose-containing products with peroxides and/or oxygen and/or ozone, characterised in that one additionally uses 0.01 to 2.5 wt. % of cyanamide and/or cyanamide salts, referred to the dry weight of the cellulose, and adjusts the pH value of the bleach to 4 to 13.
IPC 1-7
IPC 8 full level
D21C 9/10 (2006.01); D21C 9/147 (2006.01); D21C 9/153 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP US)
D21C 9/1036 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE ES FR IT LI SE
DOCDB simple family (publication)
EP 0226114 A1 19870624; EP 0226114 B1 19900711; AT E54475 T1 19900715; CA 1277457 C 19901211; DE 3544398 A1 19870619; DE 3672577 D1 19900816; ES 2016084 B3 19901016; FI 85390 B 19911231; FI 85390 C 19920410; FI 865100 A0 19861215; FI 865100 A 19870617; JP H0723593 B2 19950315; JP S62191588 A 19870821; NO 169023 B 19920120; NO 169023 C 19920429; NO 864983 D0 19861210; NO 864983 L 19870617; US 5034096 A 19910723
DOCDB simple family (application)
EP 86116722 A 19861202; AT 86116722 T 19861202; CA 524868 A 19861209; DE 3544398 A 19851216; DE 3672577 T 19861202; ES 86116722 T 19861202; FI 865100 A 19861215; JP 29785686 A 19861216; NO 864983 A 19861210; US 93956286 A 19861209