Kinetic Study on Lignin Extraction by Ionic Liquid

This paper has studied the dynamics of delignification in ionic liquids pulping for straw at atmospheric pressure. The date showed that the concentration of the residual lignin in the pulp obviously decreased with the extension of steaming time, pulp yield increase, and the hexose and pentose content in the black liquor was gradually increasing, and at the same time, the amount of the hexose was higher than the pentyl. The concentration of the residual lignin reduced gradually with the cooking temperature increased,the pulp yield increase slowly. The lignin removal reaction is first order reaction, the activation energy is 42.117kJ/mol.