Method for ozone treatment of used paper

Details Method for ozone treatment of used paper Method for ozone treatment of used paper

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) C02F 1/78 (2006.01) D21C 9/153 (2006.01)

Patent

CA 2475689

The invention concerns a novel method for ozone treatment of used paper which consists in transforming used paper into pulp in an aqueous medium, screening then de-inking said paper by liquid flotation, the method further comprising an ozone treatment step carried out at latest prior to the liquid flotation step.

La demanderesse propose un nouveau procédé de traitement de papiers usés dans lequel, les papiers usés sont mis en pâte dans un milieu aqueux, la pâte est ensuite tamisée puis désencrée par flottation, le procédé comporte en outre une étape d'ozonation effectuée au plus tard avant l'étape de flottation.

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