Deinking process

Details Deinking process Deinking process

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) C07C 51/41 (2006.01)

Patent

CA 2258786

Inks are removed from printed media by: (i) forming a pulp slurry containing the printed media and water, (ii) adding an alkaline earth metal tallate dispersion to the slurry and (iii) subjecting the slurry to flotation deinking in a flotation cell, wherein the alkaline earth metal tallate dispersion has been prepared by a double displacement method.

On enlève les encres de supports imprimés: en (i) formant une boue pâteuse contenant les supports imprimés et de l'eau, (ii) en ajoutant une dispersion de tallate de métal alcalino-terreux à la boue et (iii) en faisant subir à la boue un désencrage par flottation dans une cellule de flottation, la dispersion de tallate de métal alcalino-terreux ayant été préparée par un procédé de double décomposition.

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