Method of deinking laser printed wastepaper

Details Method of deinking laser printed wastepaper Method of deinking laser printed wastepaper

1993-05-06

1995-05-09

Jones, W. Gary

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 29, 162 41, 162189, D21C 502

Patent

active

054136750

ABSTRACT:
A process for deinking wastepaper printed with heat fused inks to provide a source of deinked paper which can be reused or repulped and converted into a recycled paper product comprises immersing the wastepaper in a non-aqueous solvent bath containing a solvent capable of dissolving the binder component of the ink, and subjecting the wastepaper to low frequency ultrasound energy to separate the ink particles from the wastepaper. The separated ink particles may be collected magnetically or otherwise and the excess solvent recovered and reintroduced into the solvent bath.

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