氧脱木质素对稻草SFP浆性能的影响

Effects of Oxygen Delignification on the Properties of Rice Straw Sulfite-Formaldehyde Pulp

亚硫酸盐―甲醛―蒽醌(SFP-AQ)法是适合于草类原料的一种制浆方法。文章研究了氧脱木质素对稻草SFP浆的卡伯值、白度、粘度及强度性能的影响。结果表明,较高的用碱量有助于残余木质素的脱除,在合适的工艺条件下,稻草SFP浆单段氧脱木质素的脱木质素率可达50%以上。在氧脱木质素用碱量3.5%、氧压0.4 MPa、温度110℃、时间60 min或90 min的条件下,稻草SFP浆的卡伯值较低、白度较高,而同时具有良好的粘度和强度性能。

The effects of alkali charge and time number, viscosity and strength properties of of oxygen delignification on brightness, Kappa rice straw sulfite-formaldehyde-anthraquinone （SF-AQ） pulp was investigated. The results show that the lignin removal of rice straw SF pulp can reach more than 50% with one stage oxygen delignification. Oxygen delignified pulp with 3.5% alkali charge is better than that with 2.5% alkali charge. Pulp with low Kappa number and high brightness with acceptable viscosity can be obtained after 60 or 90 min of oxygen delignification with the condition of alkali charge 3.5%, temperature 110℃, oxygen pressure 0.4 MPa, while the strength properties of pulp handsheet are also good.