Process and apparatus for the deresination of cellulose pulp

Details Process and apparatus for the deresination of cellulose pulp Process and apparatus for the deresination of cellulose pulp

D - Textiles, Paper

21

C

9/16, 92/52

D21C 3/02 (2006.01) D21C 9/08 (2006.01)

Patent

CA 1157209

16-242 PROCESS AND APPARATUS FOR THE DERESINATION OF CELLULOSE PULP ABSTRACT OF THE DISCLOSURE A process and apparatus are provided for the deresination of cellulose pulp, by adjusting the pulp concentration to within the range from about 15 to about 35%; adding sufficient alkali to the pulp to bring the amount of alkali, calculated as NaON, within the range from about 2 to about 17 g/kg of water accompanying the pulp; subjecting the pulp to a mild, mechanical working in the bite of twin interdigitated rotating screws at an energy input of from 8 to 100 kWh per ton of pulp; removing and reacting the pulp with the added alkali for from about 0.1 to about 5 hours, and then washing out dissolved resin from the pulp.

360196

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