废报纸脱墨浆两段漂白工艺研究  

Study on Two Stages Bleaching Technology of Waste Newspaper Deinked Pulp

作　　者：韦黎[1] 曹云峰[1] 熊林根[1] 刘祝兰[1] 

机构地区：[1]南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京210037

出　　处：《纤维素科学与技术》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)

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 sulphinic acid （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 1-1202, 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℃, bleaching time of 40 min, FAS and 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）.

关 键 词：废报纸脱墨浆 过氧化氢 甲脒亚磺酸 漂白 

分 类 号：TS749.7[轻工技术与工程—制浆造纸工程] TS745