Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
Bioresour Technol. 2011 Oct;102(20):9613-8. doi: 10.1016/j.biortech.2011.07.049. Epub 2011 Jul 22.
Hemicelluloses in industrially produced pre-hydrolysis liquor (PHL) were precipitated with ethanol. These PHL-derived hemicelluloses (PHL-EH) and a commercial, pure birch wood xylan sample (powder form) (BWX) were bleached using chlorine dioxide (D(0) and D(1)) and hydrogen peroxide (Ep) in the D(0)EpD(1) sequence, and the chemical compositions, molecular weights and charge densities of the treated samples were assessed. When applied to high-yield pulp (HYP) at 50 mg/g, 26 and 20 mg/g of the bleached PHL-EH and BWX, respectively, were adsorbed without significantly affecting paper properties. These results suggest that semi-bleached hemicelluloses could be used to increase the basis weight of paper products. Furthermore, an integrated process was proposed that converts the kraft-based dissolving pulp production process into a biorefinery unit with dissolving pulp, bleached hemicelluloses and lignin as main products.
工业生产预水解液（PHL）中的半纤维素用乙醇沉淀。这些来源于 PHL 的半纤维素（PHL-EH）和商业的、纯的桦木木聚糖样品（粉末形式）（BWX）分别用二氧化氯（D(0)和 D(1))和过氧化氢（Ep）在 D(0)EpD(1)序列中进行漂白，并评估了处理样品的化学成分、分子量和电荷密度。当应用于高得率浆（HYP）时，分别用 50 mg/g 的漂白 PHL-EH 和 BWX 处理 26 和 20 mg/g，它们被吸附而没有显著影响纸张性能。这些结果表明，半漂白半纤维素可用于增加纸制品的基重。此外，还提出了一种集成工艺，将基于硫酸盐法制浆的溶解浆生产工艺转化为一个生物精炼单元，主要产品为溶解浆、漂白半纤维素和木质素。
