摘要
对低卡伯值的麦草浆采用全无氯漂序OQP和OQP1P2进行漂白,探讨了不同目标白度(78.0%ISO至85.7%ISO)的工艺条件。研究结果表明,低卡伯值麦草浆经氧脱木素(O)和螯合预处理(Q)后,纸浆的kappa值为3.9,黏度为965ml/g。两段常压过氧化氢漂白后,纸浆的最高白度为85.7%ISO。其工艺条件如下:O段:氧压0.7MPa,反应温度100℃,反应时间60min,NaOH用量4.0%,MgSO4用量0.5%;两段常压过氧化氢漂白的工艺条件:反应温度80℃,总H2O2用量8.0%,但实际消耗的过氧化氢量较少,这主要是因为螯合处理后未漂浆的卡伯值仅为3.9,铁离子含量为29mg/kg,铜离子含量为19mg/kg,锰离子含量为3mg/kg。
Totally chlorine-free bleaching sequence （OQP/OQP1P2） of low kappa number wheat straw pulp and the operating conditions for various brightness （from 78.0%ISO to 85.7%ISO） of bleached pulp were investigated. The results show that chelated oxygeu-delignification of wheat straw pulp has a kappa number of 3.9, a viscosity of pulp 965 ml/ g. The process conditions to the highest ISO brightness of 85.7% are as follow： O stage, oxygen pressure 0.7MPa, reaction temperature 100℃, reaction time 60 min, NaOH charge 4.0%, MgSO4 charge 0.5%, reaction temperature 80℃, total H202 dosage 8.0%, but the consumption of H2O2 is low, because the kappa number and content of transition metal are low. The kappa number is 3.9, the content of Fe is 29 mg/kg, the content of Cu is 19 mg/kg, and the content of Mn is 3 mg/kg, respectively.
出处
《中华纸业》
CAS
2013年第24期16-18,共3页
China Pulp & Paper Industry
基金
湖南省教育厅项目(12C0022
11C0048)
天津市制浆造纸重点实验室开放基金资助课题(201102)
关键词
麦草浆
全无氯漂白
白度
wheat straw pulp
TCF bleaching
brightness
