甲酸脱除竹材非纤维素物质

 用甲酸对天然竹材非纤维素成分的脱除效果进行了探讨。结果表明：使用催化剂后，竹材非纤维素脱除作用明显增强，在硝酸、硫酸和盐酸三种常用催化剂中盐酸的催化作用最好；甲酸对竹材中非纤维素成分有较强的选择性脱除作用，而对纤维素的降解作用很小；甲酸的浓度、反应温度和反应时间是影响竹材非纤维素成分脱除率的三个重要因素，通过正交试验得出这三个因素对竹材非纤维素成分脱除作用的影响程度为：甲酸体积分数＞温度＞时间；得到甲酸脱除竹材非纤维素成分的最佳工艺条件为：体积分数为0.3%HCl做催化剂，甲酸体积分数为80%，温度为100℃，时间为2h，在此条件下脱除率为42.8%。

Removal of non-cellulose component of bamboo material by formic acid

The removal effect of formic acid on the non-cellulose component of natural bamboo material was discussed. The results show that: the removal effect on non-cellulose component of bamboo material was significantly enhanced by the inorganic acid catalyst; hydrochloric acid’s catalysis effect was the best among nitric acid, sulfuric acid and hydrochloric acid. Formic acid can effectively remove the non-cellulose component of bamboo material, but almost has no effect on the cellulose component. Formic acid’s concentration, reaction temperature and reaction time are three factors that have important influence on the removal ratio of non-cellulose component of bamboo material, through an orthogonal experiment, we concluded that the influence effect of the three factors is: concentration > temperature > time; The optimum treatment conditions were found to be: 0.3%HCl as the catalyst, 80% of formic acid, 100℃ and 2h of processing time; in this condition, the removal rate of 42.8%.