作　　者： ; ; ; ;

机构地区： 华南理工大学轻工与食品学院制浆造纸工程国家重点实验室

出　　处： 《造纸科学与技术》 2010年第1期6-11,75,共7页

摘　　要： 本文研究了不同反应条件下热水预抽提过程中糠醛(F)和羟甲基糠醛(HMF)的生成规律。结果表明:H因子(分别为Hp和Hh因子)及氢离子浓度能很好地描述抽提液中F和HMF生成量的变化规律。据此,分别建立了竹子热水预抽提液中F和HMF浓度的预测模型,即CF0.5=0.0005713×HP、C0F.6=9453.8×[H+]和C0H.M4F=0.000189×Hh+0.0545、C0H.M6F=2394.6×[H+]+0.0112。为了控制F和HMF的生成量,预抽提的Hp因子和Hh因子应分别控制在2000和2400以下,抽提液的氢离子浓度不应高于0.0013mol/L。这将为竹子热水预抽提过程中F和HMF生成的控制提供理论依据和技术支持。 This paper reports on the forming behaviors of furfural （F） and hydroxymethylfurfural （HMF） during bamboo hot-water pre-extraction. The results showed that hydrogen ion concentration and the H-factors, i. e. , Hp and Hh, for F and HMF, respectively, provide a good description on the F and HMF forming behaviors during the hot-water extraction at the given process conditions. Based on the H-factors and hydrogen ion concentration, the prediction models for F and HMF concentration in bamboo hot-water extracted liquor were established, i. e. , CF=0.0005713×Hp,CF^0.6=9453.8×[H＊] and CHMF^0.4=0.000189×Hh＋0.0545、CHMF^0.6=2394.6×[H＊]＋0.0112. The Hp-factor and Hh-factor, separately, should be lower than 2000 and 2400, and the hydrogen ion concentration in pre-extracted liquor should not be higher than 0. 0013mol/L for controlling the amount of F and HMF . This will provide theoretic foundation and technical support for the controlled formation of F and HMF during bamboo hot-water extraction.

关 键 词： 竹子热水预提取 因子 氢离子浓度 糠醛 羟甲基糠醛

领　　域： [轻工技术与工程]