李 蒙,付丽敏,罗小林*,黄六莲,陈礼辉.草酸酸洗对麦草氧脱木素浆中铁离子去除及H2O2漂白的影响[J].中国造纸学报,2015,30(1):6-10 本文二维码信息
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Effect of Oxalic Acid Washing on the Content of Fe3+ in Oxygen Delignified Wheat Straw Pulp and Its Hydrogen Peroxide Bleaching
  
DOI:10.11981/j.issn.1000-6842.2015.01.6
Key Words:oxalic acid washing  wheat straw  oxygen delignified pulp  ferric ion  hydrogen peroxide bleaching
作者单位
李 蒙 福建农林大学材料工程学院福建福州350002 
付丽敏 惠州市质量计量监督检测所广东惠州516003 
罗小林* 福建农林大学材料工程学院福建福州350002 
黄六莲 福建农林大学材料工程学院福建福州350002 
陈礼辉 福建农林大学材料工程学院福建福州350002 
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Abstract:
      By using oxygen delignified wheat straw pulp as material, the role of oxalic acid washing (AC) in improving Fe3+ removal and subsequent hydrogen peroxide bleaching efficiency was studied.It was found that Fe3+ removal was about 40% when pH value of washing liquor and pulp consistency were fixed as 3 and 4%, optimal treatment time and temperature of AC were 60 min and 60℃ respectively. In addition to providing acidic environment, oxalic acid could chelate Fe3+, decrease its absorption on pulp and thus change dissolving balance of Fe(OH)3. Based on these functions, the target for improving Fe3+ removal could be achieved by AC. With the same pulp kappa number and viscosity, the brightness of the pulp bleached with the OACQP sequence was 73%, which was higher than those bleached with OQP (56.4%) and OAS(sulfuric acid washing)QP (64.5%) by about 30% and 13%.
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