摘要
研究了废报纸脱墨浆过氧化氢―过氧化氢(PP)、过氧化氢―甲脒亚磺酸(PF)两段漂白工艺。结果表明,废报纸脱墨浆PP漂白中第二段过氧化氢漂白的适宜工艺条件为:浆浓20%,漂白时间2.5 h,温度60℃,乙二胺四乙酸(EDTA)用量0.2%,硫酸镁用量0.05%,硅酸钠用量0.5%,过氧化氢用量4%,氢氧化钠用量0.5%,漂后浆白度71.5%(ISO);PF漂白中第二段甲脒亚磺酸漂白的适宜工艺条件为:漂白温度60℃,漂白时间40 min,浆浓10%,甲脒亚磺酸(FAS)用量1.6%,NaOH用量0.8%,漂后浆白度68%(ISO)。
The technology of hydrogen peroxide-hydrogen peroxide(PP)two stages bleaching and hydrogen peroxid-formamidine sulphinicacid(PF)two stages bleaching of waste newspaper deinked pulp were investigated emphatically.The results showed that the optimum bleaching conditions of the second P stage in the PP two stages bleaching were determined as follows:bleaching temperature was 60℃,with H₂O2,Na2SiO3 and NaOH dosage on oven dry pulp of 4%,0.5%,and 0.5%.Other parameters such as pulp consistency,bleaching time,EDTA and MgSO4 dosage on oven dry pulp were kept at constant at 20%,2.5 h,0.2%and 0.05%,respectively.So the brightness of this bleached pulp was up to 71.5%(ISO)under the optimum condition.In addition,the optimum bleaching conditions of the second F stage in the PF two stages bleaching were pulp consistency of 10%,bleaching temperature of 60’C,bleaching time of 40 min,FASand NaOH dosage on oven dry pulp of 1.6%and 0.8%.And then the resulting pulp was obtained with the brightness of 68%(ISO).
作者
韦黎
曹云峰
熊林根
刘祝兰
WEI Li;CAO Yun-feng;XIONG Lin-gen;LIU Zhu-lan(Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology,Nanjing Forestry University,Nanjing 210037,China)
出处
《纤维素科学与技术》
CAS
CSCD
2011年第4期45-50,共6页
Journal of Cellulose Science and Technology
基金
"江苏省青蓝工程中青年学术带头人培养对象"省教育厅资助课题(164105308)
关键词
废报纸脱墨浆
过氧化氢
甲脒亚磺酸
漂白
waste newspaper deinked pulp
hydrogen peroxide
formamidine sulphinic acid
bleaching
