Official Journal of the Japan Wood Research Society
Table 2 Effects of prehydrolysis and active alkali on soda-anthraquinone (AQ) cooking of EFB
Prehydrolysisa time (min) | Active alkalib (%) | Kappa number | Pulp yield (%) | Viscosity (cPc) |
|---|---|---|---|---|
90 | 19 | 17.5 | 37.3 | 17.5 |
120 | 19 | 14.6 | 36.5 | 19.7 |
150 | 19 | 11.5 | 35.0 | 20.0 |
180 | 19 | 10.7 | 33.5 | 20.2 |
90 | 20 | 13.9 | 37.1 | 20.8 |
120 | 20 | 11.2 | 35.8 | 21.0 |
150 | 20 | 10.3 | 33.4 | 21.8 |
180 | 20 | 9.6 | 31.1 | 23.1 |
90 | 21 | 13.0 | 37.1 | 19.5 |
120 | 21 | 11.1 | 34.9 | 20.9 |
150 | 21 | 10.2 | 31.7 | 22.4 |
180 | 21 | 9.4 | 29.0 | 22.8 |