玉米芯水解残渣中纤维素和木素的分离纯化

Separation and Purification of Cellulose from Corncob Hydrolysis Residues

以玉米芯水解残渣为原料,采用碱性H_2O_2和NaClO_2两段法处理,以纤维素含量与木素脱除率为指标,对纤维素和木素的分离纯化工艺进行了实验探讨。结果表明,碱性H_2O_2处理段较适宜的条件为:混合液中NaOH用量3%,H_2O_2用量0.8%和反应温度80℃;NaClO_2处理段较适宜的条件为:NaClO_2浓度12 g/L,处理温度70℃;经过以上两段处理,玉米芯水解残渣中纤维素含量为84.73%,木素脱除率高达91.11%,分离纯化效果最佳。

In order to upgrade the utilization value of corncob hydrolysis residue （CHR） and separate and purify cellulose and lignin from CHR, CHR was treated by two stages treatment of alkali H202 and NaCI02, using the cellulose content and the removal rate of lignin as evaluation index to optimize the treatment process. The results showed that the optimal conditions were H2O2 dosage of 0. 8%, NaOH dosage of 3%, reaction temperature of 80℃, and NaClO2 concentration of 12 g/L, temperature of 70℃ for the two stages treatment. Under this conditions, the content of cellulose was 84. 73% and the removal rate of lignin was 91.11%, it reached the best separation and purification efficiency.