Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1992-09-09
1995-03-28
Jones, W. Gary
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 4, D21B 132
Patent
active
054013607
ABSTRACT:
A two phase method for deinking printed waste paper having a mixture of printing inks is shown. The first phase is carried out in a neutral or slightly acid medium and the second phase in an alkaline medium. The first phase has disintegration, ink removal, and thickening steps. The second phase includes mixing and treating the thickened output from phase one with alkaline reagents, removal of any residual ink, and a second thickening. A third treatment of the removed ink and recycling of the media is also indicated.
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Centre Technique de l'Industrie des Papiers, Cartons et Cellulos
Jones W. Gary
Lamb Brenda
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