杨木NS-AQ法超高得率漂白化学浆的研究  

Manufacture of Neutral Sulfite-Anthraquinone Ultra High Yield Bleached Chemical Pulp of Aspen

作　　者：张学铭[1] 张运展[1] 邢效功[1] 

机构地区：[1]大连轻工业学院

出　　处：《中国造纸学报》2005年第1期24-27,共4页Transactions of China Pulp and Paper

摘　　要：对杨木NSAQ法制超高得率漂白化学浆进行了探讨,着重研究了蒸煮过程中温度、NaOH/Na2CO3和用药量对成浆质量的影响以及氧脱木素的最佳漂白工艺条件。实验结果表明,蒸煮最佳工艺条件为用药量22.6%(Na2O计),最高温度175℃,Na2CO3∶NaOH(质量比)=100∶0,亚硫酸化度为0.85,保温3h,液比1∶4,AQ用量0.1%,蒸煮结果得率70.3%,卡伯值45.4;氧脱木素的最优条件为浆浓11%,氧压0.6MPa,NaOH用量5%,温度95℃,H2O2用量3%,时间60min,Na2SiO3用量3.0%,MgSO4用量0.3%。漂白结果粘度1072.0mL/g,白度86.6%ISO,漂白损失10.8%。Manufacture of neutral sulfite-anthraquinone ultra high yield bleached chemical pulp of aspen was studied in this paper, which mainly focused on the cooking parameters including temperature, Na2CO3/NaOH ratio and total chemical charge and the parameters of oxygen delignification and bleaching. The results showed that the optimum cooking conditions were as follows: total chemical charge 22.6% (as Na2O), maximum temperature 175°C, sulfitity 0.85, time 180 min, the liquor-to-wood ratio 4.0, AQ charge 0.1%, the cooking results: yield 70.3%, kappa number 45.4. The optimum oxygen delignification conditions were as follows: pulp consistency 11%, the pressure of oxygen 0.6 MPa, NaOH charge 5%, temperature 95°C, H2O2 charge 3%, time 60 min, Na2SiO3 charge 3.0%, MgSO4 charge 0.3%. The bleaching results: viscosity 1072.0 mL/g, brightness 86.6%ISO, bleaching loss 10.8%.

关 键 词：漂白化学浆 NS-AQ法 高得率 杨木 NA2SIO3 NaOH 最佳工艺条件 Na2CO3 H2O2用量 氧脱木素 亚硫酸化度 MgSO4 蒸煮过程 成浆质量 最高温度 最优条件 用药量 质量比 卡伯值 浆浓 氧压 白度 

分 类 号：TS743[轻工技术与工程—制浆造纸工程] TS743.1