摘要
杨木与桉木ＫＰ浆经氧脱木素，卡伯值分别降低４８．１％和４７．３％。杨木浆在氧脱木素前用过氧酸预处理，桉木浆在氧脱木素段用１％Ｈ２Ｏ２强化，脱木素程度分别达５５．８％和５３．６％。上述杨木浆再经（ＰｘａＯ）ＤＥｐＰ程序漂白，白度达８５．７％，桉木浆再经ＯＤＥｐＰ和ＯｐＤＥｐＰ程序漂白，白度分别为８３．３％和８７．８％。
Kappa numbers of Populus and Eucalyptus kraft pulps are reduced by 48 1% and 47 3% respectively after oxygen delignification.Peroxyacid pretreatment of populus kraft pulp before oxygen delignification and hydrogen peroxide reinforcement of oxygen delignification of Eucalypt kraft pulp can remove 55 8% and 53 6% residual lignin of the pulps respectively while the viscosities of the pulps increase. High brightness of the pulps can be obtained by short sequence ECF bleaching.The brightness of Populus kraft pulp bleached with(PxaO)DEpP sequence can reach to 85 7% and the brightness of Eucalypt kraft pulp bleached with ODEpP and OpDEpP can reach 83 3% and 87 7% respectively.
出处
《中国造纸》
CAS
北大核心
1997年第5期30-34,共5页
China Pulp & Paper
关键词
杨木
桉木
KP浆
无元素氯漂白
制浆工艺
oxygen delignification,peroxyacid,hydrogen peroxide,ECF bleaching,kraft pulp
