The data presented in Figure 1 show that all hemp pulps (Hs3-6, Hw-r, Hw-nr) are delignified with oxygen in a manner characteristic of this process, i.e. with a relatively large amount of lignin removed from the pulp in the initial stage and significantly lower amounts removed in the second. The pattern of the delignification of pulps obtained from hemp stalks (Hs3- 6) and wood (Hw) is similar to that of the delignification of birch pulp (B).
Figure 2 shows comparative yields of oxygen-delignified pulps obtained from hemp and tree wood pulps.
Analysis of Figure 2 reveals that pulps derived from hemp wood (Hw-nr, Hw-r) have a yield comparable to that of birch pulp, i.e. approximately 96%, when del- ignified to a kappa number of 10 - 12. A slightly higher yield (approx. 1%) was obtained from hemp stalks (Hs3-6) of similar kappa numbers.
The data presented in Figure 1 show that all hemp pulps (Hs3-6, Hw-r, Hw-nr) are delignified with oxygen in a manner characteristic of this process, i.e. with a relatively large amount of lignin removed from the pulp in the initial stage and significantly lower amounts removed in the second. The pattern of the delignification of pulps obtained from hemp stalks (Hs3- 6) and wood (Hw) is similar to that of the delignification of birch pulp (B).
Figure 2 shows comparative yields of oxygen-delignified pulps obtained from hemp and tree wood pulps.
Analysis of Figure 2 reveals that pulps derived from hemp wood (Hw-nr, Hw-r) have a yield comparable to that of birch pulp, i.e. approximately 96%, when del- ignified to a kappa number of 10 - 12. A slightly higher yield (approx. 1%) was obtained from hemp stalks (Hs3-6) of similar kappa numbers.
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