Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
162 5, 162 55, 162 57, D21B 108, D21B 132
A process for separating printing ink from recycled paper fiber includes the steps of repulping recycled paper furnish with water in a rotary mixer for about 5 minutes at a consistency of 6% to 18% with a mixing element having a top speed no greater than 2,000 ft/min. This first stage repulping and mixing is followed by a second mixing stage of 20 to 45 minutes with a mixing element tip speed of 2,500 to 4,000 ft/min. Agglomerated contamination particles in the resulting slurry are removed by centrifugal cleaning and slot screening.
patent: 2872313 (1959-02-01), House et al.
patent: 3425897 (1969-02-01), Murphy, Jr.
patent: 4000031 (1976-12-01), Acobas
patent: 4224102 (1980-09-01), Mamers et al.
patent: 4566942 (1986-01-01), Holz et al.
patent: 4619736 (1986-10-01), Henricson et al.
patent: 4816117 (1989-03-01), Pfalzer et al.
patent: 5059280 (1991-10-01), Thompson
patent: 5112444 (1992-05-01), Henricson et al.
W. J. Fondow, "Pulping Of Secondary Fiber", Proceedings, Contaminant Problems, and Strategies in Wastepaper Recycling, TAPPI (1989), 21-31.
International Paper Company
Jones W. Gary
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