| 摘要 |
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. |
