Method for discharging delignified cellulosic materials from...

Details Method for discharging delignified cellulosic materials from... Method for discharging delignified cellulosic materials from...

D - Textiles, Paper

21

C

92/57

D21C 7/00 (2006.01) D21C 7/08 (2006.01)

Patent

CA 1301516

ABSTRACT Lignocellulosic material, after delignification in an alkaline pulping liquor, can be removed from the digester in which it was pulped by first cooling the cooked material and relieving the overpressure from the digester, and then pumping the cooked material from the diges- ter to a receiving vessel as a fluid suspension in spent liquor. When the fluid suspension is pumped at a low flow rate, the pulp thus ob- tained is superior in its physical properties to pulped material which is discharged under conventional conditions of high pressure and high flow rate from batch or continuous digesters.

560849

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