Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1995-04-04
1997-05-27
Drodge, Joseph W.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 4, 210704, D21C 502
Patent
active
056328575
ABSTRACT:
A process for removing water borne flexographic inks from paper stock comprising the steps of (a) forming a slurry by pulping paper containing water borne flexographic inks in an aqueous medium having a pH of greater than 8 which includes: (1) one or more basic agents; (2) one or more nonionic surfactants; (3) one or more anionic polyelectrolytes; and (4) an amount of paper different from that being processed which contains inorganic fillers, coatings or mixtures thereof; and (b) subjecting the slurry produced in step (a) to a flotation cell having an aqueous medium having a pH of greater than 8 which includes: (1) one or more basic agents; (2) one or more nonionic surfactants; and (3) one or more anionic polyelectrolytes is provided.
REFERENCES:
patent: 4043908 (1977-08-01), Roberts et al.
patent: 4347099 (1982-08-01), Deceuster et al.
patent: 4599190 (1986-07-01), Maloney
patent: 5094716 (1992-03-01), Letscher
patent: 5288369 (1994-02-01), Ishibashi et al.
patent: 5384010 (1995-01-01), Hou et al.
patent: 5417807 (1995-05-01), Fossas et al.
patent: 5454955 (1995-10-01), Albrecht et al.
Drodge Joseph W.
Rhone-Poulenc Inc.
Solomon Andrew M.
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