碱性离子液体有效去除烟梗中木质素的研究

制备碱性离子液体［Mmim］DMP，将其作为溶剂，以微波辐射为加热源，研究其对造纸法再造烟叶原料烟梗中木质素的去除效果.建立了快速、准确的液相木质素紫外分光光度定量分析方法，通过正交实验确定了碱性离子液体有效去除烟梗中木质素的最佳工艺：浸渍温度80 ℃，浸渍时间25 min，浸渍料液比1∶15.在此工艺条件下，烟梗木质素的去除率达到22.60%，其溶解去除率约为常规热水提取的5倍.烟梗经离子液体处理后，纤维间的填充物大量脱除，纤维轮廓更清晰，有利于后续原料打浆及烟气品质控制.
Making alkaline ionic liquid ［Mmim］ DMP and using it as solvent by microwave heating，the effective removal of lignin in tobacco stems of reconstituted tobacco was studied. A rapid and accurate method for quantitative determination of liquid lignin by using UV spectrometry was established. The optimum technology for the removal of lignin in tobacco stems with the ionic liquids was determined by orthogonal experiment as follows: a maceration temperature of 80℃，a maceration time of 25 min and a solid /liquid ratio of 1∶15. In this process，the removal rate of lignin was 22.60%. The removal rate was about 5 times of that of water extraction. After extraction of tobacco stems by using ionic liquids，the fillers of fiber were removed heavily and the fiber profile was clearer，which were conducive to the pulping of the subsequent raw materials and the control of smoke quality.