无硫蒸煮在竹材溶解浆制备中的应用

Production of Bamboo Dissolving Pulp by Sulfur Free Cooking Process

通过正交实验方法,研究无硫竹材溶解浆制备的适宜工艺条件。结果表明,无硫蒸煮优化的工艺条件为:用碱量16%,最高温度170℃,高保温时间100 min,蒸煮助剂用量0.15%;在此工艺条件下,制得的未漂本色竹浆粕性能指标为:卡伯值9.9,黏度691 mL·g-1,得率33.1%,多戊糖4.6%,白度35.8%ISO,黑液残碱14.5 g·L-1。然后对本色竹浆粕进行单段氧脱木素,其工艺条件为:氧压0.55 MPa、用碱量2%、硫酸镁0.5%、100℃、氧漂时间60 min。再经D0-EOP-D1-A四段漂白,得到漂白竹浆粕性能指标为:得率90.3%(对未漂浆),α-纤维素含量94.7%,黏度447mL·g-1,R1896.5%,R1095.3%,白度87.1%ISO,灰分0.06%,铁含量16 mg·kg-1,可满足黏胶纤维产品的生产要求。

By orthogonal experiment method to study no sulfur dissolved pulp prepared suitable process conditions. The results showed that the sulfur-free cooking optimum conditions： alkali dosage 16%, maximum temperature of 170℃, time at maximum temperature lOOmin, cooking additives 0.15%; Under this condition, the qualities of resultant bamboo dissolving pulp are： kappa number 9.9, viscosity 691 mL·g -1, yield 33.1%, pentosan 4.6%, brightness 35.8%ISO, black liquor residual alkali 14.5g·L-1.