Process for removing ink from wastepaper

Details Process for removing ink from wastepaper Process for removing ink from wastepaper

1987-07-01

1988-06-07

Bashore, S. Leon

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209170, 162 4, 261 87, B03D 102, B03D 122

Patent

active

047494735

ABSTRACT:
Wastepaper is treated by a ink-removing process in which an aqueous wastepaper pulp slurry is introduced into a treating vessel, air is blown into the wastepaper pulp slurry preferably through a number of air-blowing orifices formed on a peripheral surface of at least one horizontal cylinder located in the bottom portion of the vessel to absorb ink particles floating in the wastepaper pulp slurry by air bubbles ejected from the orifices and rising toward the wastepaper pulp slurry surface. The resultant ink-absorbed froth is then removed. In this process, air is blown in an amount satisfying the relationship (I)

REFERENCES:
patent: 507774 (1893-10-01), Ball
patent: 1608896 (1926-11-01), MacIntosh
patent: 4288319 (1981-09-01), Heijs et al.
patent: 4399028 (1983-08-01), Kile et al.
Pfalzer, "The Injector Cell-a Low-energy Flotation Machine" Tappi Journal, Oct. 1982, pp. 73-76.
Flynn, "Precise Air Control Key to Efficient Flotation Cell Deinking Operation" Pulp & Paper, Jul. 1983, pp. 78-81.

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