玉米秸秆纤维素提取及半纤维素与木质素脱除工艺探讨

Study on Extraction of Cellulose and Removal of Hemicelluloses and Lignin from Corn Stalk

为了获取优质的纤维素,以玉米秸秆为原料,通过对纤维素提取工艺的探讨,确定了既能保持纤维素提取量,又可较多脱除半纤维素和木质素的工艺条件。试验结果表明,在NaOH溶液的质量分数为5%、反应温度为55℃、反应时间为1.5h条件下,半纤维素的脱除率达到92.82%;在NaClO2溶液浓度为9.5g/L、处理温度75℃条件下,木质素脱除率达到64.32%。在此工艺条件下,玉米秸秆纤维素含量达到70.12%。

To get the high quality cellulose, by studying on the extraction technology of cellulose from corn stalk, the author had determined the technique of more extraction contents of cellulose and bigger removal rate of hemicellulose and lignin. The results showed that the removal rate of hemicellulose was 92.82% under the conditions of NaOH concentration 5%, extracting temperature 55℃, extracting time 1.5 h. The removal rate of lignin was 64.32 % under the conditions of NaClO 2 concentration 9.5 g/L, extracting temperature 75℃. Based on these conditions, the content of cellulose extraction was more than 70.12%.