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A New Measurement Method of Silica Content in Sulfate Pulping Black Liquor
  
DOI：10.11980/j.issn.0254-508X.2014.01.003
Key Words:black liquor  silicon content  performic acid  spectrophotometry
Fund Project:本课题受国家十二五科技支撑计划项目课题（2012BAD23B0201）、国家级大学生创新创业训练计划项目（201210708009）、国家自然科学基金（20876092）、陕西科技大学学科带头人培育计划项目（20876092）的资助。
Author NameAffiliation
徐永建1 1.陕西科技大学造纸工程学院，陕西省造纸技术及特种纸品开发重点实验室，教育部轻化工助剂重点实验室，陕西西安，710021 
胡忠宇1 1.陕西科技大学造纸工程学院，陕西省造纸技术及特种纸品开发重点实验室，教育部轻化工助剂重点实验室，陕西西安，710021 
张永奇1 1.陕西科技大学造纸工程学院，陕西省造纸技术及特种纸品开发重点实验室，教育部轻化工助剂重点实验室，陕西西安，710021 
王润宇1 1.陕西科技大学造纸工程学院，陕西省造纸技术及特种纸品开发重点实验室，教育部轻化工助剂重点实验室，陕西西安，710021 
朱振峰2 2.陕西科技大学材料科学与工程博士后流动站，陕西西安，710021 
张鼎军3 3.贵州赤天化集团纸业股份有限公司，贵州赤水，564707 
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Abstract:A new measurement method of silica content in sulfate pulping black liquor was put forward on the basis of comentional silica molybdenum blue spectrophotometry, in which the effect of lignin and reducible sulfur compound in the black liquor on the absorbance values in the silica molybdenum blue spectrophotometry was eliminated by the performic acid resolution method. The analysis results of the new method was more truthful and accurate compared to the traditional silica molybdenum blue spectrophotometry. The recovery of silica content was 99% to 102% used this method. This method had a better stability, easy operation and less disturbance than the traditional method, was suitable for analysis and detection of silica content in sulfate pulping black liquor.
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