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首页> 外文会议>TAPPI(Technical Association of the Pulp and Paper Industry) Engineering, Pulping amp; Environmental Conference; 20061105-08; Atlanta,GA(US) >CHEMICAL AND PULPING CHARACTERISTICS OF CORN STALK FRACTIONS
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CHEMICAL AND PULPING CHARACTERISTICS OF CORN STALK FRACTIONS

机译：玉米秸秆馏分的化学和纸浆特性

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摘要

Two different varieties of domestic, whole corn stalk were separated into three fractions: stalk (depithed), leaves, and husks. One variety had almost twice the pith content of the other. A portion of each fraction was milled and tested for ash content, hot water solubles, NaOH solubles, solvent extractives, and klason lignin content. With respect to lignin content, the test values showed that stalks > leaves > husks. Ash content values were similar for all three fractions. NaOH solubility varied according to leaves > husks > stalks. Hot water solubility and solvent extractives were similar for the fractions of one variety, but for the other variety the stalk fraction had much higher values. While the leaf fraction of both varieties had similar composition, the stalk and husk fractions of one variety had a much higher level of ash, water solubles, and extractives than for the other variety. Each (unmilled) fraction was pulped, using a mild soda-AQ process. For both varieties, the stalk fraction had higher total and screened yields than the other fractions. The variety with higher ash, solubles, and extractives had a much poorer response to pulping, with the stalk fraction requiring 37 % more alkali to reach a bleachable Kappa number. Fiber length values for the unbleached pulps were similar to those for hardwoods, but the fiber width values were lower.
机译：整个国内玉米秸秆的两个不同品种分为三个部分：秸秆（去皮），叶片和果壳。一种品种的髓含量几乎是另一种品种的髓含量的两倍。研磨每个级分的一部分，测试其灰分，热水可溶物，NaOH可溶物，溶剂萃取物和克拉森木质素含量。关于木质素含量，测试值表明，茎＞叶＞壳。所有三个部分的灰分含量值均相似。 NaOH的溶解度根据叶片>稻壳>茎而变化。一个品种的馏分的热水溶解度和溶剂萃取物相似，但另一种品种的茎馏分具有更高的值。虽然两个品种的叶级分具有相似的组成，但一个品种的茎和壳部分具有比其他品种高得多的灰分，水溶性和提取物含量。使用温和的苏打-AQ工艺将每个（未研磨的）级分制浆。对于这两个品种，秸秆部分的总收率和筛选出的收率均高于其他部分。灰分，可溶物和萃取物含量较高的品种对制浆的反应较差，茎部分需要更多的碱37％才能达到可漂白的Kappa值。未漂白纸浆的纤维长度值与硬木相似，但纤维宽度值较低。

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