Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1988-05-02
1989-04-11
Hastings, Karen
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 6, 162 55, D21C 502
Patent
active
048203793
ABSTRACT:
The present invention relates to a method of removing ink from secondary fiber by contacting a pulp of said secondary fiber with an aqueous medium in the presence of a polymeric material having a glass transition temperature in the range of from about 20.degree. C. to about 70.degree. C. and a substituted polyethylene oxide to agglomerate the ink into discrete masses and separating the agglomerated ink from the pulp-containing aqueous medium.
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1987 TAPPI Pulping Conference Proceedings, pp. 133-142.
Hastings Karen
PPG Industries Inc.
Whitfield Edward J.
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