Impregnation of wood particles

Details Impregnation of wood particles Impregnation of wood particles

D - Textiles, Paper

21

C

9/2

D21C 3/00 (2006.01) D21C 1/10 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1057007

IMPREGNATION OF WOOD PARTICLES ABSTRACT OF DISCLOSURE: A method particularly useful in the treatment of small chips to produce wood pulp is disclosed. The me- thod includes impregnating small chips in an impregna- tion zone using a large quantity of impregnation liquor having a moderate concentration of cooking chemical which permits more uniform impregnation and the formation of a more uniform pulp. The liquor and small chips at a liquor to wood ratio of no more than 9 to 1 i.e. at a consistency of less than 10% pass through the impregnation zone. Im- pregnated small chips are separated from the impregnation liquor by means of a drainer or a press and the impregnated small chips are cooked at a low liquor to wood ratio pre- ferably in the vapour phase.

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