甘油碱法脱除烟梗中的木质素

  目的  应用甘油碱法工艺对烟梗进行处理，制备低木质素烟梗薄片。  方法  以木质素脱除率和浆得率为衡量指标，对甘油碱法制浆工艺条件进行了优化，并比较了不同预处理工艺对再造烟叶烟气评吸质量的影响。  结果  （1）甘油碱法制浆最佳工艺条件为，氢氧化钾用量45%、蒸煮温度为200℃、蒸煮液固比为11∶1、蒸煮时间为0.5h，此时烟梗中的木质素含量为5.06%，木质素脱除率为43.01%，浆得率为37.12%。（2）甘油碱法的木质素脱除率和木质气降低效果虽然稍逊色于氧碱法，但其对烟气质量提升的综合效果明显优于氧碱法和乙酸法。（3）采用甘油碱法再造烟叶制备的项目卷烟，其感官质量优于常规卷烟。  结论  采用甘油碱法工艺制备的烟草薄片，木质素含量低，应用于卷烟中可提升烟气品质。 

Removing lignin from tobacco stems with glycerin alkali method

In order to prepare tobacco stem sheets with low lignin content, technological condition for processing tobacco stems with glycerin alkali method was optimized。The effect of different pretreatment processes on smoke quality of reconstituted tobacco was compared.Results show that∶ (1) The optimum process conditions were as follows∶ potassium hydroxide dosage was 45%, cooking temperature was 200 ℃, liquidsolid ratio was 11∶1, and cooking time was 0.5h.Under these conditions, the lignin content in tobacco stems was 5.06%, the removal rate of lignin was 43.01%, the yield of pulp was 37.12%.(2) The lignin removal rate and reduction effect of lignin flavor by glycerin alkali method were slightly inferior to those by oxygen alkali method, but glycerin alkali method was better than oxygen alkali method and acetic acid method in improving smoke quality.(3)Sensory quality of the target cigarettes made with reconstituted tobacco by glycerin alkali method was better than that of routine cigarettes.It can be concluded that the reconstituted tobacco prepared by glycerine process had low lignin content and could be used to improve smoke quality of cigarette.