DELIGNIFICATION OF ALEPPO PINE WOOD (Pinus halepensis Mill) BY SODA-ANTHRAQUINONE PROCESS: PULP AND PAPER CHARACTERISTICS

Aleppo pine, the dominant species of the Algerian forest, grows in sufficient quantity to satisfy its various industrial applications. Papermaking is a possible way for the valorization of the wood products resulting from thinning operations or short rotation logging. The present study observes the delignification of aleppo pine (Pinus halepensis Mill) young wood by an alkaline process (soda-anthraquinone), which allows the preparation of a chemical pulp from this type of wood (small wood). The physico-chemical and morphological analysis of the pulp is carried out, along with the study of delignification, to better understand the reactivity of wood in alkaline cooking. The kinetics of delignification shows that a total cooking time of 135 min makes it possible to exceed the defibring point by giving a yield bordering 44% with a kappa number of 29. It is obvious that the results obtained encourage the use of aleppo pine young wood as a raw material for the Algerian paper industry.