摘要
对桉木KP浆进行单段氧脱木素工艺研究,重点比较了筛前浆和筛后浆以及滤液洗涤对氧脱木素效果的影响,并进行了纤维分析。结果表明:桉木KP浆最佳氧脱木素工艺为:浆浓10%,用碱量4.0%,温度100℃,时间80min,氧压0.5MPa。此时所得浆样的白度54.48%ISO,黏度688.5mL·g-1,卡伯值10.39。滤液洗浆和筛前浆的氧脱木素效果优于筛后浆的氧脱木素效果,滤液洗浆的白度增值率最高为18.3%,筛前浆的木素脱除率和得率最高,分别为47.3%、96.9%。这几种浆样经过氧脱木素后纤维长度几乎没有差别,粗度变化不大。
Oxygen delignification of Eucalyptus kraft pulp and their performance were studied in this paper, focusing on the effects of oxygen delignification on unscreened pulp, screened pulp and the pulp washing with filtrate, as well as conducted fiber analysis. The results showed that the best oxygen delignification process on Eucalyptus KP pulp as follows, the dose of alkali was 4.0%（relative to dry, as below）, the time was 80 min, pulp consistency was 10%, the temperature was 100℃, the oxygen pressure was 0.5MPa, and 0.5% MgSO4 during the oxygen bleaching as a protecting agent for carbohydrates. Pulp obtained at this condition, the brightness was 54.48% ISO, viscosity was 688.5mL·g-1, Kappa number was 10.39. The pulp washing with filtrate and unscreened pulp were better than the screened pulp after oxygen delignification, the pulp washing with filtrate had the highest brightness, and the add rate of brightness was 18.3%, lignin removal rate and the yield of unscreened pulp were the highest, they were 47.3%, 96.7% respectively. These types of pulps were almost no difference in fiber length and the coarseness changed little after oxygen delignification.
出处
《纸和造纸》
北大核心
2010年第7期5-8,共4页
Paper and Paper Making
关键词
硫酸盐浆
氧脱木素
筛选
滤液
eucalyptus kraft pulp
oxygen delignification
screening and filtrate.
