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ECF漂白

ECF漂白的相关文献在1998年到2022年内共计114篇,主要集中在轻工业、手工业、工业经济、生物化学 等领域,其中期刊论文82篇、会议论文4篇、专利文献3529篇;相关期刊25种,包括华南理工大学学报(自然科学版)、中国学术期刊文摘、国际造纸等; 相关会议4种,包括中国造纸学会第十四届学术年会、2009年中国制浆造纸用木材资源研讨会、两广造纸学会2008年学术年会等;ECF漂白的相关文献由168位作者贡献,包括陈嘉川、杨桂花、吉兴香等。

ECF漂白—发文量

期刊论文>

论文:82 占比:2.27%

会议论文>

论文:4 占比:0.11%

专利文献>

论文:3529 占比:97.62%

总计:3615篇

ECF漂白—发文趋势图

ECF漂白

-研究学者

  • 陈嘉川
  • 杨桂花
  • 吉兴香
  • 田中建
  • 马浩
  • 袁素娟
  • 宋雪萍
  • 翟华敏
  • 聂双喜
  • 刘玉
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 陈绍旭; 马志超; 尹勇军; 詹磊; 林婷婷; 陆晓丹; 周燕英
    • 摘要: 能源和化学品价格的快速上涨使得制浆工作者尤为关注如何降低纸浆漂白成本.本研究构建了纸浆漂白成本的在线计算模型,并应用于典型ECF漂白技术(D0EpPD1),同时系统分析了影响纸浆漂白成本的主要因素和该模型在漂白工艺条件优化过程中的应用效果.研究发现,化学品成本是影响漂白成本的最主要因素,其次是能源成本、废水处理成本、清水成本;化学品中ClO2用量对纸浆漂白成本的影响最大,其次是H2O2用量,NaOH用量影响最小;能源成本中蒸汽用量对纸浆漂白成本影响最大;而清水成本和废水处理成本影响最小;通过对化学品用量、漂白温度等漂白工艺条件的调整可降低纸浆漂白成本;该模型可实现对漂白工艺条件的优化或能源及化学品价格变化后纸浆漂白成本的在线预测,也是实现纸浆漂白系统全局优化、进一步降低漂白成本的基础.
    • 袁亚东; 张锦; 时留新; 金二锁
    • 摘要: The cooking conditions of Liriodendron Hybrids for preparing dissolving pulp were optimized. It provided theoretical support for Liriodendron Hybrids becoming a new material to produce dissolving pulp. In the stage of pre-hydrolysis, the conditions were controlled followed by acid concentration of 0.5%, temperature of 170°C, liquor ratio of 1∶3.5 and hydrolysis time of 90 min. In the following cooking period, holding temperature of 165°C, holding time of 90 min, liquor ratio of 1∶4, alkali charge of 19%(Na2O) and sulfidity of 20%was set for cooking chips by kraft method. Oxygen delignification, ECF bleaching process of D0EpD1 and following dilute acid washing was operated, and dissolving pulp with first grade quality was obtained. The dissolving pulp had the property with viscosity of 8.5 MPa·s,α-cellulose content of 96.2%, ash content of 0.04%, pentosan component of 2.58%, brightness of 89.1%ISO, iron ion proportion of 12.5 mg/kg.%对杂交鹅掌楸制备溶解浆的蒸煮工艺条件进行了优化,为其成为制备溶解浆新材料提供了理论支持。在0.5%酸浓、170°C、液比1∶3.5条件下稀酸预水解90 min,而后在蒸煮条件为保温温度165°C、液比1∶4、保温时间90 min、用碱量19%(Na2O计)、硫化度20%下对木片进行硫酸盐法蒸煮,接着进行氧脱木质素和D0EPD1漂序的ECF漂白,然后进行稀酸洗涤,最终制得粘度为8.5 MPa·s、-纤维素为96.2%、灰分为0.04%、聚戊糖为2.58%、白度为89.1%ISO、铁离子含量为12.5 mg/kg、二氯甲烷抽出物为0.05%的一等品溶解浆。
    • 戴铠; 翟华敏
    • 摘要: 研究了高纯度耐热耐碱木聚糖酶(X_A)对麦草化学浆预处理的选择性及其ECF漂白特性的影响。结果表明:该木聚糖酶预处理麦草化学浆的选择性较高,有明显的助漂效果。经酶预处理后,在相同用氯量情况下,其D_0ED_1D_2各段白度较参照浆均有明显提高,1.0 IU/g酶用量的预处理即可达到一定的助漂效果。采用X_AD_0ED_1D_2漂白程序,酶用量4.0 IU/g,卡伯因子0.21,终漂浆白度可达近90%ISO,在高白度情况下较参照漂白浆提高近3个百分点;当漂到参照浆相同白度(87%ISO)时,经酶处理可减少D_0段23.5%的ClO_2用量(14%总ClO_2用量)。较高的温度、pH(80°C、pH 8.0)、较宽的酶用量(1.0~4.0 IU/g)范围,使该木聚糖酶颇具工业应用前景。预处理专一地降解半纤维素、脱除一定程度木质素和己烯糖醛酸,是其改善漂白性能的重要原因。
    • 刘红峰
    • 摘要: ZDED and DEDD sequences were applied on an oxygen-delignified eucalyptus (mixture of E.grandisand E.saligna) kraft pulp from Brazil. When ZDED and DEDD were compared, the displacement ratio calculated as the quantity of pure chlorine dioxide replaced by 1 kg ozone was found between 2.5 and 3.5 kg, as compared to 1.7 kg in theory—indicating that less wasting reactions occur in the ZDED sequence. The cellulose viscosity decreased substantially with the increase in the ozone charge (down to 50% at 0.8% ozone). Other typical characteristics of the ZDED pulps were easier beating, lower water retention value, higher proportion of kinked fibers, and lower wet zerospan breaking length (seen only at 0.8% ozone charge), as compared to DEDD. The viscosity loss due to the introduction of ozone in an elemental chlorine free sequence did not translate into a similar loss in strength. A comparison with the depolymerizing effect of cellulase suggests that the determining factoris not the extent of the drop in viscosity but rather the heterogeneity of the attack along the fibers. It is concluded that ozone oxidation of cellulose in the fibers would be rather homogeneous. Moreover, the appearance of morecurls and kinks would not be necessarily related to the viscosity loss. For example, a (2,2,6,6-tetramethylpiperidin-1-yl) oxidanyl (TEMPO) treated DEDD pulp, enriched in carboxyl groups, had more straight fibers than the original DEDD pulp, despite its lower viscosity. The presence of ionic groups would be a more important factor; the lower content in carboxyl groups in the ZDED pulps, compared to the DEDD pulps, could promote the easier formation of curl and kinks during the ZDED sequence.%巴西桉木浆(巨桉和柳桉)氧脱木素采用了ZDED和DEDD漂白工序.对比ZDED和DEDD漂白工序,计算出的置换率(1kg臭氧可代替的纯二氧化氯量)为2.5~3.5kg,而理论值为1.7kg,表明ZDED漂白工序中无效反应较少.随着臭氧用量的增加,纤维黏度大幅降低(臭氧用量0.8%时,纤维黏度降低50%).与采用DEDD漂白的桉木浆相比,采用ZDED漂白的桉木浆其他典型特性有:易打浆、保水值低、纤维连接比例高和湿零距裂断长低(仅发生在臭氧用量为0.8%时).
    • 成显波; 吉兴香; 陈桂光; 梁智群
    • 摘要: The xylanase-assisted pulp bleaching technology was summarized in this paper. The conditions of kraft wood pulp ECF bleaching processes was analyzed, the application program for applying xylanase under acidic condition in ECF bleaching was put forward. A series of new research results domestic and abroad were introduced, which show that xylanase to be applied in pulp bleaching must possess such properties as keeping the long term bioactivity at 70~90°C reaction temperature, free from cellulase or low cellulase bioactivity and stability in alkaline condition. Furthermore, xylanase with lower moleculer-weight proved to be favorable to improve bleaching efifciency.%概述了木聚糖酶辅助纸浆漂白的意义和现状,分析硫酸盐木浆ECF漂白工艺条件,提出在ECF漂白中应用酸性木聚糖酶的方案。介绍国内外科研工作者对纸浆辅助漂白木聚糖酶研究的最新成果。指出用于纸浆漂白的木聚糖酶应具备以下酶学性质:在70~90°C高温环境下保持长效活力,不含纤维素酶或者纤维素酶活较低,具有一定的碱稳定性。低分子量的木聚糖酶有利于提高漂白效率。
    • 刘倩; 彭建军; 王根; 沈臻煌; 杨小博
    • 摘要: 将麦草浆ECF漂白(DQP)中的P段洗涤废水用于D段漂后浆料的洗涤,初步探讨P段洗涤废水回用对漂白废水污染负荷及浆料性能的影响.结果表明,P段洗涤废水回用后,漂后浆料白度升高1~2个百分点,黏度略有下降;不同漂剂用量下,漂白废水CODcr下降0~2.5 kg/t漂白浆,BOD5下降2.1~2.9 kg/t漂白浆,AOX下降17% ~ 20%,漂白废水产生量减少30%.
    • Alexis Métais; Jean-Christophe Hostachy; Brendan Van Wyk
    • 摘要: 论述了一种应用臭氧的新方法:热酸处理漂段A放在臭氧漂段Z之前。已有充分的证据证明,从化学药剂成本的角度达到效率最大化,可通过A-Z结合工艺方法明智地用酸抽提己烯糖醛酸(HexA),辅以更具针对性的臭氧脱木素来实现。
    • 杨洁; 平清伟; 管函
    • 摘要: 主要研究对芦苇乙醇法三段逆流蒸煮浆进行ECF漂白。浆料分别采用Op-D-E-P,Op-D1-E1-D2-E2-P,拟定了各段最优参数,主要分析氧漂出现的问题,探讨二氧化氯用量对D1、D2漂段的影响,以及过氧化氢用量对漂白的影响,从而能获得比较高的得率。最后确定Op-D1-E-D2-P漂序。浆浓环境是10%,最终浆料ISO白度为82.5‰得率为63.93%。
    • 杨洁; 平清伟; 管函
    • 摘要: 主要研究对芦苇乙醇法三段逆流蒸煮浆进行ECF漂白.浆料分别采用Op-D-E-P,Op-D1-E1-D2-E2-P,拟定了各段最优参数,主要分析氧漂出现的问题,探讨二氧化氯用量对D1、D2漂段的影响,以及过氧化氢用量对漂白的影响,从而能获得比较高的得率.最后确定Op-D1-E-D2-P漂序.浆浓环境是10%,最终浆料ISO白度为82.5%,得率为63.93%.
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