桉木常规KP浆和RDH浆的氧脱木素研究(Ⅱ)——预处理和强化对常规KP浆氧脱木素的改善效果  

Improving Oxygen Delignification of Efficiency Eucalyptus Kraft Pulp by Pretreatment and Reinforcement

作　　者：赵建[1] 李雪芝[1] 石淑兰[2] 胡惠仁[2] 

机构地区：[1]山东大学微生物技术国家重点实验室,山东济南250100 [2]天津科技大学材料科学与化学工程学院,天津300222

出　　处：《中国造纸学报》2003年第2期35-38,共4页Transactions of China Pulp and Paper

摘　　要：研究了预处理和强化对桉木常规KP浆氧脱木素效果的影响。结果表明 ,在氧脱木素时添加H2 O2 和甲醇进行强化 ,或在氧脱木素前采用KMnO4 对浆料进行预处理 ,对氧脱木素都有良好的改善效果。与单纯的氧脱木素相比 ,使用 0 8%H2 O2 、6 %甲醇 (对浆料总液量的体积百分比 )和 1 5%KMnO4 ,浆料脱木素程度分别增加了 5 7%、4 5%和 2 0 3% ,纸浆白度分别增加 6 8%ISO、5 1 %ISO和 1 2 6 %ISO ,而纸浆粘度仅分别多降低 2 35%、1 72 %和 2 8%。采用KMnO4 预处理与H2 O2 强化相结合 ,可以更有效地改善氧脱木素效率 。Improving oxygen delignification efficiency of eucalyptus kraft pulp by KMnO4 pretreatment and H2O2 and methanol reinforcement was studied. The results showed that reinforcement with H2O2 and methanol in oxygen delignification stage, and pretreatment with KMnO4 prior to oxygen delignification can improve oxygen delignification of kraft pulp from eucalyptus, increase degree of oxygen delignification and brightness of oxygen delignified pulps with little influence on viscosity of the pulp. Compared to oxygen delignification without any additives, using 0.8% H2O2, 6% methanol (based on volume of pulp slurry) and 1.5% KMnO4 separately as reinforcement and pretreatment agents, degree of delignification in oxygen stage increased by 5.7%, 4.5% and 20.3% respectively (from 44.9% to 50.6%, 49.4% and 65.2% respectively), and ISO brightness of oxygen delignified-pulps increased by 6.8% ISO, 5.1% ISO and 12.6% ISO respectively (from 54.0% ISO to 60.8% ISO, 59.1% ISO and 66.6% ISO respectively), viscosity of oxygen delignified-pulps only decreased by 2.35%, 1.72% and 2.8% (based on unbleached pulp). Combining KMnO4 pretreatment and H2O2 reinforcement, efficiency of oxygen delignification and ISO brightness of delignified pulps further increased.

关 键 词：氧脱木素 KP浆 桉木 RDH浆 纸浆白度 浆料 H2O2强化 甲醇 KMnO4 研究 

分 类 号：TS745[轻工技术与工程—制浆造纸工程] TS749.1