添加多硫化钠的马尾松硫酸盐法蒸煮特性

研究了添加多硫化钠硫酸盐法蒸煮的特性.结果表明,多硫化钠用量、小保温温度以及小保温时间对马尾松纸浆的得率、卡伯值和粘度均有较明显的影响.在一定范围内,增加多硫化钠用量,采用相对合理的较高的小保温温度以及适当延长小保温时间有益于提高纸浆得率,改善脱木质素的选择性.

Characteristic of the Delignification of Pinus massoniana in KP-PS/AQ Process

This paper deals with the effects of polysulfide on the KP-PS/AQ of Pinus massoniana. The results show that polysulfide charge, temperature and time at the temperature during cooking process had an obvious effect on the pulp yield, Kappa number and viscosity. A proper high polysulfide dosage, high temperature and long time at this temperature during the cooking process are beneficial to the pulp yield and the selectivity of delignification. Thus they improved the selectivity of delignification and can extend delignification. The influence of polysulfide is based on a specific oxidation of the reducing end groups to carboxyl group via glucosone intermediates.