Application of Alkaline Ionic Liquids in the Pretreatment Process of Eucalyptus Kraft Pulping
Yi Hou,
Chao Liu,
Junxin Xu,
Youming Li,
Songqing Hu
Affiliations
Yi Hou
South China University of Technology; China
Chao Liu
South China University of Technology; China
Junxin Xu
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; National Engineering Research Center of Papermaking and Pollution Control, South China University of Technology, Guangzhou 510640, China; China
Youming Li
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; National Engineering Research Center of Papermaking and Pollution Control, South China University of Technology, Guangzhou 510640, China; China
Songqing Hu
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; National Engineering Research Center of Papermaking and Pollution Control, South China University of Technology, Guangzhou 510640, China; China
In order to explore the potential application of green solvent ionic liquids (ILs) in the kraft pulping process, eucalyptus wood was pretreated by [Mmim]DMP before normal pulping. The results showed that materials pretreated shortly by the ionic liquid had a higher yield and viscosity coupled with a lower potassium permanganate value and residual lignin content in the pulp, as a result of the cooking process. It was also inferred that alkaline [Mmim]DMP pretreatment could dissolve lignin effectively from fiber to result in a stronger binding force and more entangled properties. Paper tensile and burst strength were improved by about 40% and 60%, respectively. These results provide a new way for eucalyptus to be utilized in the kraft pulping process.
