D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 5/02 (2006.01)
Patent
CA 2206006
The invention concerns a method of removing printing inks from printed wastepaper, whereby an additive is added in a metered manner to the process water and the precipitated solids are then removed by flotation and/or filtration. The additive contains one or a plurality of amino and/or ammonium group-containing polymers and/or copolymers, with number average molecular weights of between 2,000 and 1,000,000, and one or a plurality of cellulose derivatives. The deinked wastepaper is distinguished by high brightness whilst the recycled water is very clear.
L'invention concerne un procédé qui permet d'éliminer les encres d'imprimerie présentes sur des papiers de récupération, selon lequel un additif est ajouté de manière dosée à l'eau de traitement et les substances solides détachées pendant le processus sont ensuite éliminées par flottation et/ou par filtration. L'additif renferme un ou plusieurs polymères et/ou copolymères contenant des groupes amino et/ou ammonium dont les poids moléculaires moyens en nombre se situent entre 2.000 et 1.000.000, ainsi qu'un ou plusieurs dérivés cellulose. Les papiers de récupération ainsi désencrés se caractérisent en ce que leur degré de blanc est important et que l'eau de recyclage est simultanément très limpide.
Hornfeck Klaus
Liphard Maria
Nellessen Bernhard
Henkel Kommanditgesellschaft Auf Aktien
Van Zant & Associates
LandOfFree
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