Table 1.
Chemical composition and properties of the pine cellulosic pulps.
| Active alkali | Kappa number | Pulp yield from digester | Pulp yield after screening | Glucose | Mannose | Lignin | Extractives | Ash | DP |
|---|---|---|---|---|---|---|---|---|---|
| [%] | [–] | [–] | [–] | [%] | [%] | [%] | [%] | [%] | [–] |
| 20 | 89.7 (0.4) | 49.33 (0.47) | 47.19 (0.55) | 79.1 (0.2) | 6.0 (0.3) | 13.5 (0.2) | 1.4 (< 0.1) | 1.4 (0.2) | 2387 (11) |
| 21 | 76.5 (0.1) | 47.62 (0.39) | 46.94 (0.41) | 81.2 (0.4) | 5.9 (0.4) | 11.5 (0.2) | 1.0 (< 0.1) | 1.4 (0.1) | 2414 (17) |
| 22 | 63.8 (0.4) | 46.14 (0.32) | 45.68 (0.29) | 82.9 (0.4) | 6.1 (0.5) | 9.6 (0.1) | 0.8 (< 0.1) | 1.4 (0.2) | 2788 (42) |
| 24 | 46.6 (0.5) | 43.64 (0.42) | 43.52 (0.35) | 85.4 (0.6) | 6.2 (0.3) | 7.0 (0.1) | 0.7 (< 0.1) | 1.4 (0.1) | 3273 (12) |
| 30 | 29.6 (0.6) | 40.53 (0.36) | 40.50 (0.31) | 87.5 (0.5) | 6.7 (0.3) | 4.4 (0.1) | 0.6 (< 0.1) | 1.4 (0.1) | 2282 (40) |
| 34 | 23.7 (0.4) | 38.54 (0.29) | 38.54 (0.44) | 88.7 (0.7) | 6.3 (0.1) | 3.6 (< 0.1) | 0.5 (< 0.1) | 1.4 (0.1) | 2053 (4) |
| 38 | 19.1 (0.6) | 36.91 (0.22) | 36.91 (0.28) | 88.9 (0.4) | 6.8 (0.2) | 2.9 (< 0.1) | 0.4 (< 0.1) | 1.4 (0.2) | 1589 (35) |
| 38 (bleached pulp) | 0.5 (0.1) | 37.32 (0.24) | 37.32 (0.24) | 97.1 (0.5) | 2.0 (< 0.1) | 0.1 (0.0) | 0.0 (0.0) | 0.8 (< 0.1) | 1074 (7) |