No abstract

thuya / délignification / soude-anthraquinone / rendement / indice Kappa Abstract -Characteristics of the pulp and paper of "thuya de Berbérie" (Algeria) (Tetraclinis articulata Vahl) obtained by soda-antraquinone process. The coniferous trees of the thuya de Berbérie (Tetraclinis articulata Vahl), from the North Africa (Algeria) is commonly grown as a coppice stand. The biomass of thuya, and especially its wood, can be transformed in pulp by the paper and pulp industry throughout the soda cooking process with the help of the anthraquinone (AQ). The young wood (20 years-old) is well delignified in the soda-anthraquinone process, in the usual conditions applied to the resinous species, in the cooking time schedule of 145 min with the level of 165• C of temperature. The pulp yield of raw material obtained is 43.3% (oven dried wood), with a kappa number of: 33.6. In the same cooking conditions, the mature wood (60 years-old) can be also treated, but with some lower delignification level.thuya / delignification / soda-anthraquinone / pulp yield / Kappa number