麦草氧碱法纸浆压力/温度过氧化氢漂白  

THE PRESSURIED/TEMPERATURE HYDROGEN PEROXIDE BLEACHING OF WHEAT-STRAW SODA-OXYGEN PULPS

作　　者：曹云峰[1] 杨益琴[1] 李忠正[1] 

机构地区：[1]南京林业大学化学工程学院,江苏南京210037

出　　处：《林产化学与工业》2005年第3期59-62,共4页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(39770601;30070636)

摘　　要：麦草氧碱法纸浆经压力/温度H2O2(Ppt)漂白时,纸浆的卡伯值随H2O2用量和氧压的提高而下降,卡伯值从17.3下降至2.38,下降幅度达86.2 %,表明Ppt漂白时,脱木质素效果明显.若采用氧脱木质素 -鳌合处理 -压力温度H2O2漂白(OQPpt)和氧脱木质素 -酸处理 -压力温度H2O2(OAPpt)漂程,当H2O2用量为原料质量的3 %～4 %时,均可将麦草氧碱纸浆漂至白度80 %(SBD,以下同)左右,而采用OAPpt漂白比OQPpt漂白的纸浆的白度高2.0 %左右,且聚合度达到1 038左右.Wheat-straw soda/soda-oxygen pulps were bleached through pressurized-temperature H2O2 （ Ppt ） in this research. Kappa number of pulp decreased with increasing of H2O5 charge and oxygen pressure. Kappa number was reduced from 17.3 to 2.38, the removal of remaining lignin up to 86.2 %. That is to say that Pp, bleaching had high efficiency of delignification. Brightnesses of the bleached wheat straw soda-oxygen pulps by both-oxygen delignification-chelant pretreatment-pressurized/temperature H2O2 （OQPpt） and oxygen delignification-acidic pretreatmentpressurized/temperature H2O2 （OAPpt） sequences reached to about 80 % （SBD）, when 3 % -4% peroxide charge as used in the Ppt bleaching stage, while brightness of the pulp bleached by sequence of OAPpt was 2.0 % （SBD） higher than that by the OQPpt sequence and the degree of polymerization of bleached pulp reached about 1 038.

关 键 词：麦草 氧碱法蒸煮 漂白 

分 类 号：TQ91[化学工程] TS745[轻工技术与工程—制浆造纸工程]