A selection of the best wood raw materials for cellulose pulp and papermaking from five varieties of the Leucaena has been made (Leucaena diversifolia, Leucaena collinsii and three varieties of Leucaena leucocephala) with growth periods of one, two and three years. In accordance with biomass production and the features of the raw materials and cellulose pulp obtained, L. diversifolia in its second year of growth was selected as the most suitable material for pulp and papermaking. Pulping of L. diversifolia by soda–ethanol was studied using an experimental design in order to investigate the effects of cooking variables: temperature, time, soda concentration, ethanol concentration and wash-disintegrate temperature on the chemical composition of the obtained pulps (yield, kappa number, viscosity, solubles substances, lignin, holocellulose and α-cellulose contents) and the physico-chemical characteristics of paper sheets (tensile index). The results were evaluated using the response surface methodology. The optimum pulping conditions were established for this lignocellulosic material, using the model predictions. The pulp obtained at these conditions has suitable chemical (pulp) and physical (paper sheets) characteristics: yield (46.5%), 1%NaOH solubles (3.04%), hot water solubles (0.63%), ethanol–benzene extractives (0.44%), holocellulose contents (96.7%), α-cellulose contents (75.8%), lignin contents (0.85%), viscosity (1367) kappa number (15.2) and tensile index (19.2 kN m/kg).
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机译：已经从五个变种的Leucaena（Leucaena diversifolia，Leucaena collinsii和三个变种Leucaena leucocephala）中选出了最佳的纤维素纸浆和造纸木材原料，其生长期分别为1、2和3年。根据生物质的生产以及所获得的原料和纤维素纸浆的特性，在第二年的生长时间中，L。diversifolia被选为最适合制浆和造纸的材料。为了研究蒸煮变量：温度，时间，苏打浓度，乙醇浓度和洗涤分解温度对制浆化学成分（收率，卡伯值，粘度，可溶物，木质素，全纤维素和α-纤维素含量）和纸张的理化特性（拉伸指数）。使用响应面方法评估结果。使用模型预测为该木质纤维素材料确定了最佳制浆条件。在这些条件下获得的纸浆具有合适的化学（纸浆）和物理（纸页）特性：收率（46.5％），1％NaOH可溶物（3.04％），热水可溶物（0.63％），乙醇-苯萃取物（0.44％ ），全纤维素含量（96.7％），α-纤维素含量（75.8％），木质素含量（0.85％），粘度（1367）卡伯值（15.2）和拉伸指数（19.2 kN m / kg）。
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