부산대학교 도서관

In this study, wheat straw was investigated in order to evaluate it as raw material for pulp production with the application of solvolysis methods of delignification. Experiments were carried out to investigate the effect of pulping parameters on the properties of pulp. The aqueous solutions of acetic acid, solution of acetic acid, ethyl acetate and water in equal parts and water-ethanol solution of ammonia and sulfur dioxide were used as cooking liquors. Pulp was prepared at various temperatures and time according to a 22 full-factorial design. The experimental-statistical models for wheat straw pulping were obtained and optimal conditions of the process using Harrington's desirability function were determined. The obtained results show that the pulping conditions impact on yield, residual lignin content and strength properties of pulp. Comparing the results obtained, it can be concluded that the delignification of wheat straw with water-ethanol solution of ammonia and sulfur dioxide presents better results of strength properties. The application of the proposed technology enables obtaining pulp from wheat straw which can be used in paper production as an alternative to wood pulp. [ABSTRACT FROM AUTHOR]