EP 0712452 A1 19960522 - IMPROVED DEINKING METHOD USING INK AGGLOMERATION
Title (en)
IMPROVED DEINKING METHOD USING INK AGGLOMERATION
Title (de)
VERBESSERTES DEINKING-VERFAHREN DURCH TINTEN-AGLLOMERATION
Title (fr)
PROCEDE PERFECTIONNE DE DESENCRAGE PAR AGGLOMERATION DE L'ENCRE
Publication
Application
Priority
- US 9408774 W 19940802
- US 10088693 A 19930802
Abstract (en)
[origin: WO9504187A1] Deinking of printed paper is accomplished by defibering printed wastepaper (1) to produce a pulp medium and contacting the pulp medium with an aqueous medium containing a deinking chemical (2) wherein the presence of the deinking chemical causes agglomeration of ink particles to produce an ink pulp medium. Agglomerated ink particles are removed from the ink pulp medium by size (3) and density (4) separation procedures to produce a substantially ink-free pulp medium. The invention provides improved deinking processes with high ink removal from printed paper by more effective agglomeration of ink particles through separation of defibering and agglomeration actions which are subject to different chemical and physical requirements.
IPC 1-7
IPC 8 full level
D21C 5/02 (2006.01)
CPC (source: EP)
D21C 5/025 (2013.01); Y02W 30/64 (2015.05)
Designated contracting state (EPC)
DE ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9504187 A1 19950209; AU 7479994 A 19950228; CA 2168578 A1 19950209; EP 0712452 A1 19960522; EP 0712452 A4 19990421
DOCDB simple family (application)
US 9408774 W 19940802; AU 7479994 A 19940802; CA 2168578 A 19940802; EP 94924565 A 19940802