| 摘要 |
<p>2048618 9010749 PCTABS00002 A method of de-inking waste paper materials consists in pulping the paper material in a hydropulper (1) to form a fibrous stock, and adding a substance in the form of a mixture of phosphated and carbonated sodium salts to the fibrous stock to disperse ink particles from the stock. The stock and dispersed ink particles pass through washing stages (4), (7) and (8), in a centrifugal cleaner (3), in order to remove the ink particles from the fibrous stock.</p> |
