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[目的]研究蔗渣中半纤维素、纤维素和木质素的分离条件。[方法]在溶剂-酸-水混合体系中对蔗渣半纤维素、纤维素和木质素进行蒸煮分离,利用单因素试验和响应面分析法对主要影响因素进行分析优化,得到最佳的分离条件。[结果]通过响应面分析法预测最佳的分离工艺条件为溶剂浓度(v/v)69.63%、酸浓度(v/v)6.41%、反应时间4 h,此条件下模型预测的半纤维素水解率为98.07%、纤维素存留率为92.49%、木质素去除率为66.72%,验证试验半纤维素水解率为99.00%、纤维素存留率为92.08%、木质素去除率为67.06%,接近理论值。[结论]研究结果可较好地用于蔗渣半纤维素、纤维素和木质素的分离。
[Objective] The study aimed to study the separation conditions of hemicellulose, cellulose and lignin in bagasse. [Method] The bagasse hemicellulose, cellulose and lignin were digested and separated in the solvent - acid - water mixed system. The main influencing factors were analyzed and optimized by single factor experiment and response surface analysis, and the best separation conditions were obtained . [Result] The optimum separation conditions were as follows: solvent concentration (v / v) 69.63%, acid concentration (v / v) 6.41% and reaction time 4 h by response surface analysis. The hydrolysis rate was 98.07%, the cellulose retention rate was 92.49%, the lignin removal rate was 66.72%. The validation test hemicellulose hydrolysis rate was 99.00%, the cellulose retention rate was 92.08% and the lignin removal rate was 67.06% Theoretical value. [Conclusion] The research results can be used for the separation of hemicellulose, cellulose and lignin of bagasse.