A method of de-inking waste paper materials

Details A method of de-inking waste paper materials A method of de-inking waste paper materials

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) D21C 3/00 (2006.01) D21C 9/08 (2006.01) D21D 1/40 (2006.01) D21H 17/66 (2006.01)

Patent

CA 2048618

A method of de-inking waste paper materials consists in pulping the paper material in a hydropulper (I) to form a fibrous stack, and adding a substance in the form of a mixture of phosphated and carbonated sodium salts to the fibrous stock to dis- perse ink particles from the stock, The stock and dispersed ink particles pass through washing stages (4), (7) and (8), in a centrifu- gal cleaner (3), in order to remove the ink particles from the fibrous stock.

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