Soda pulping of sapwood
2004
Rahman, S. M. | Jahan, M. S. | Rashid, M. H. O. | Mahbubar Rahman, A. H. M.
Pulping of sapWOOd by soda and soda.anthraquinone (AQ) processes was done with varying cooking variables, namely cooking time, temperature, alkali concentration and liquor ratio, At 20% alkali concentration in 2 hours of cooking at 170 °e, sapWOOd produced pulp of about 42% yield with kappa number ofabout 25. The pulp yield was increased by 2-3% on ovendried (o.d.) wood with an addition of 0.1 % AQ in soda liquor at the targeted kappa number of 25. The addition of AQ in soda liquor saved cooking time by 1 hour or alkali concentration by 2% on o.d. wood. The physical properties of sapwood pulp from soda-AQ process were greater than those of pulp from soda process.
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