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

Improved Oxygen Delignification of RDH Kraft Pulp from Eucalyptus by Pretreatment and Reinforcement

作　　者：李雪芝[1] 赵建[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》2006年第2期18-21,共4页Transactions of China Pulp and Paper

摘　　要：研究了HNO3/NaNO3预处理、KMnO4预处理和H2O2强化对桉木RDH硫酸盐浆氧脱木素的改善效果,并与常规KP浆进行了对比。结果表明,少量H2O2对RDH浆氧脱木素具有良好的强化效果,较佳的H2O2用量为0.8%。在制备低卡伯值纸浆时,采用RDH蒸煮与H2O2强化的氧脱木素相结合的制浆方法比采用常规KP蒸煮与H2O2强化的氧脱木素相结合的方法更有利于保护纸浆的黏度。在氧脱木素前对RDH浆进行HNO3/NaNO3或KMnO4预处理也有利于改善氧脱木素的效果,提高残余木素的脱除程度,其中KMnO4预处理还可以较明显地提高纸浆白度。但相对而言,这两种预处理方式更适合于用来改善常规KP浆这类残余木素含量较高纸浆的氧脱木素。Improved oxygen delignifieation of RDH （Rapid displacement heating） kraft pulp from eucalyptus by pretreatment with HNOs/NaNO3 and KMnO4, and reinforcement with H2O2 was studied in the paper. The results showed that addition of a low charge H2O2 to oxygen stage enhanced oxygen delignification of RDH pulp, and the optimum charge of H2O2 was 0.8% （on oven dry pulp weight）. The pulping method, which combined RDH cooking with H2O2-reinforeed oxygen delignification was superior to that which combined conventional kraft cooking with H2O2-reinforeed oxygen delignification in the production of pulp with low kappa number and high viscosity. Pretreatment with HNO3/NaNO3 and KMnO4 prior to oxygen stage could improve efficiency of oxygen delignification, increase residual lignin removal rate, KMnO4 pretreatment also increased effectively brightness of the oxygen-delignified pulp. Relatively, oxygen delignification with HNO3/NaNO3 and KMnO4 pretreatment was more suitable for conventional kraft pulp than RDH pulp.

关 键 词：RDH 硫酸盐浆 氧脱木素 预处理 强化 

分 类 号：TS743.9[轻工技术与工程—制浆造纸工程]