Treatment of cellulosic material and compositions for use in...

Details Treatment of cellulosic material and compositions for use in... Treatment of cellulosic material and compositions for use in...

D - Textiles, Paper

21

C

D21C 5/02 (2006.01)

Patent

CA 2152782

Waste paper, especially office waste including laser and/or photocopier paper, is subjected to de-inking by pulping in the presence of a water-soluble anionic polymer at a substantially neutral pH and then by flotation in the presence of a cationic surfactant.

Du papier de récupération, notamment du papier de récupération de bureaux comprenant des copies laser et/ou des photocopies, est soumis à un désencrage consistant à le réduire en pâte en présence d'un polymère anionique soluble dans l'eau à un pH sensiblement neutre, puis à une flottation en présence d'un tensioactif cationique.

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