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首页> 外文期刊>Journal of Wood Chemistry and Technology >Effect of Alkaline Hemicellulose Extraction on Kraft Pulp Fibers from Eucalyptus Grandis
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Effect of Alkaline Hemicellulose Extraction on Kraft Pulp Fibers from Eucalyptus Grandis

机译：碱性半纤维素提取物对桉树牛皮纸浆纤维的影响

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摘要

The alkaline extraction of hemicelluloses from hardwoods prior to pulping, for further conversion to value-added products, seems to be a promising pathway for paper mills to increase profit and improve sustainability. However, the amount of hemicellulose extracted will be limited by the requirement to maintain pulp quality and pulp yield in comparison to existing pulping processes. The effects of NaOH concentration, temperature, and time on hemicellulose extraction of Eucalyptus grandis were studied using a statistical experimental design. Extracted wood chips were subjected to kraft pulping to evaluate the effect of the extraction on cooking chemicals, pulp quality, and handsheet paper strengths. The selective xylan recovery (12.4% dry mass) from E. grandis combined with low-cooking, active alkali charge, and less cooking time advantaged the xylan extraction and subsequent modified kraft pulping process under the studied conditions. Pulp viscosity, breaking strength, and tensile index of handsheets were slightly improved.
机译：制浆前从硬木中碱提取半纤维素，以进一步转化为增值产品，似乎是造纸厂增加利润和改善可持续性的有前途的途径。但是，与现有制浆工艺相比，提取半纤维素的量将受到维持纸浆质量和纸浆产量的要求的限制。使用统计实验设计研究了NaOH浓度，温度和时间对桉树半纤维素提取的影响。将提取的木屑进行牛皮纸制浆，以评估提取对烹饪化学品，纸浆质量和手抄纸强度的影响。在研究条件下，从大肠埃希氏菌中选择性回收木聚糖（干质量为12.4％）与低蒸煮，活性碱加入量和更少的蒸煮时间相结合，有利于木聚糖的提取和随后的改性牛皮纸制浆过程。纸浆的纸浆粘度，断裂强度和拉伸指数略有提高。

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