紫外光谱法实时测定新枞酸的氧化动力学研究  

Study on the kinetics of oxidation of neoabietic acid using UV-VIS spectroscopy

作　　者：刘珈伶[1] 刘雄民[1] 关文龙[1] 赖芳[1] 李伟光[1] 

机构地区：[1]广西大学化学化工学院精细化工研究所,广西南宁530004

出　　处：《食品工业科技》2014年第4期140-143,共4页Science and Technology of Food Industry

基　　金：广西科学研究与技术开发计划项目(桂科攻12118008-2);广西研究生教育创新计划项目(105931003096);广西八桂学者团队项目;玉林市科技计划项目(201210505)

摘　　要：采用了紫外光谱法建立的新枞酸定量分析方法，跟踪测定在连续反应器上的新枞酸氧化反应动力学。在物质的量范围0．6420×10^-6～3．854×10^-6mol内，新枞酸的吸光度（A1）与物质的量（n1）的线性关系是：A1=0．7390×10^6n1＋0．2403。在反应温度25、30、40、50℃下，新枞酸的氧化反应动力学呈现表观一级反应，氧化速率常数分别为0．0024、0．0040、0．0083、0．0168min^-1。反应的表观活化能Ea为61．39kJ·mol^-1。The method was applied to the analysis of the mole quantities of neoabietic acid by UV Spectrophotometry. The kinetics of oxidation of neoabietic acid was investigated using a continuous experiment apparatus. Results and conclusions drawn were as follows. Firstly, plot of absorption （A1） against the mole quantity（n1） was linear：A1=0.7390×10^6n1＋0.2403,in the mole quantity range of 0.6420×10^-6～3.854×10^-6mol. Secondly.the oxidation reaction was first order at 25,30,40,50℃ ,respectively. The reaction rate constants were 0.0024, 0.0040,0.0083,0.0168min-1,respectively. Finally,the reaction activation energy was 61.39kJ·mol-1.

关 键 词：新枞酸 氧化反应 动力学和机理 紫外光谱 

分 类 号：TQ651.2[化学工程—精细化工]