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首页> 外文期刊>Industrial Crops and Products >Evaluation of the mild Mg(OH)(2)-AQ aided alkaline oxidation degumming process of ramie fiber at an industrial scale
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Evaluation of the mild Mg(OH)(2)-AQ aided alkaline oxidation degumming process of ramie fiber at an industrial scale

机译：评价MID MG（OH）（2） - 在工业规模下苎麻纤维的抗碱性氧化脱胶过程

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The traditional alkaline (TA) degumming process using NaOH is a huge challenge in terms of energy consumption and environmental pollution. An earlier laboratory study initiated a Mg(OH)(2)-AQ aided alkaline oxidation (MAAO) degumming method, which is of promise as an alternative to TA degumming. In this study, the MAAO degumming was evaluated at an industrial scale. With an increase of the scouring pressure, the difference of fibers located in the inner and outer parts of the ramie cage became successively weak and even faded away, finally resulting in the equivalent residual gum content of 7.3% and unseparated fiber rate of 1.4% for both fibers at 0.6 MPa. Two percent of the 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) addition in high hardness nature water (60 mg/L for Sichuan, 6 mg/L for Hunan) increased above 70% of fiber tenacity. The MAAO degumming process allowed 80.3% of the ramie fiber yield. The cellulose and hemicellulose retention reached 97.7% and 47.6%, respectively, whereas 90.1% of the gum removal, indicating a robust component selectivity of the MAAO method. The resulting fiber was 6.27 cN / dtex of the tenacity and 64 mm of the length, respectively, which was similar to that of conventional oxidation degumming. Remarkably, the MAAO de gumming process consumed 33% less water and 50% shorter degumming time, and discharged 21.4% less total COD, than the TA degumming did. The MAAO method is of promise to the industrial application of oxidation degumming of ramie.
机译：使用NaOH的传统碱性（TA）脱胶过程在能耗和环境污染方面是一个巨大的挑战。早期的实验室研究引发了Mg（OH）（2）-AQ辅助碱性氧化（Maao）脱胶方法，这是承诺作为TA脱胶的替代品。在这项研究中，Maao Degumming以工业规模评估。随着擦洗压力的增加，位于苎麻笼的内部和外部的纤维差异连续弱，甚至褪色，最终导致等效的残留胶含量为7.3％，未分子的纤维率为1.4％两种纤维在0.6MPa。 1-羟基乙基-1,1-二膦酸（HEDP）的两种百分之二的高硬度自然水（60mg / L对于湖南6毫克/升）增加偏纤维韧度的70％以上。 Maao Degumming过程允许苎麻纤维产量的80.3％。纤维素和半纤维素潴留分别达到97.7％和47.6％，而胶的90.1％，表明MAAO方法的鲁棒组分选择性。得到的纤维分别为韧度和64mm的韧度为6.27cn / dtex，其长度与常规氧化脱胶相似。值得注意的是，毛泽东的过程消耗了33％的水和50％的脱胶时间，总鳕鱼排放了21.4％，而不是TA脱胶。 Maao方法是希望苎麻氧化脱胶的工业应用。

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