Method of treatment of waste paper of the like

Details Method of treatment of waste paper of the like Method of treatment of waste paper of the like

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) D21B 1/32 (2006.01) D21B 1/36 (2006.01) D21C 1/02 (2006.01)

Patent

CA 2098092

Method is disclosed of treatment of waste paper or the like at high temperatures in the range of 160°C to about 230°C. The furnish is treated in a digester with or without added chemicals but in the presence of saturated steam. The preferred dwell times are in the range of about 1 minute to about 6 minutes. The treated furnish is then discharged from the digester, preferably, but not exclusively, by an explosive discharge. The advance in the art is in an improved de-inking effect, reduced consumption of chemicals and power. Also, some furnishes previously unsuitable for re-cycling, have been successfully processed by the method of the invention.

DEJA TRADUIT.

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