| 硝酸氧化淀粉制备草酸动力学研究 |
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| 引用本文： | 贾瑛,王煊军,崔虎,吕晓猛.硝酸氧化淀粉制备草酸动力学研究[J].化学推进剂与高分子材料,2008,6(4). |
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| 作者姓名： | 贾瑛 王煊军 崔虎 吕晓猛 |
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| 作者单位： | 第二炮兵工程学院503室,陕西西安,710025;第二炮兵工程学院503室,陕西西安,710025;第二炮兵工程学院503室,陕西西安,710025;第二炮兵工程学院503室,陕西西安,710025 |
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| 摘 要： | 探讨利用硝酸与淀粉在酸性及催化剂与助催化剂存在条件下合成草酸的反应机理,提出了在酸性条件下由淀粉水解成葡萄糖,葡萄糖进一步被硝酸氧化成草酸的宏观动力学模型。该过程分为2步:淀粉水解过程为表观一级反应,动力学方程为CA=CA0exp(-k1t);葡萄糖氧化过程通过稳态法处理后,动力学方程为CE=CB0(1-e-k2t)。通过实验计算出其中参数k1=0.082min-1;k2=0.0050min-1。研究结果为报废液体推进剂红烟硝酸的再利用提供了理论与技术支持。
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| 关 键 词： | 硝酸 淀粉 草酸 反应机理 动力学 |
Study on Kinetics of Oxalic Acid Preparation by Starch Oxidized With Nitric Acid |
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| JIA Ying,WANG Xuan-jun,CUI Hu,LU Xiao-meng.Study on Kinetics of Oxalic Acid Preparation by Starch Oxidized With Nitric Acid[J].Chemical Propellants & Polymeric Materials,2008,6(4). |
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| Authors: | JIA Ying WANG Xuan-jun CUI Hu LU Xiao-meng |
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| Abstract: | Reaction mechanism of synthesizing oxalic acid by starch and nitric acid with catalyst and cocatalyst under acidic condition is explored. The macroscopical dynamics mode of starch becoming glucose by hydrolysis under acidic condition, the glucose further becoming oxalic acid by nitric acid oxidation is put forward. This course divides into two steps: starch hydrolysis course is apparent first order reaction, the dynamics equation is: CA=CA0exp(-k1t); the glucose oxidation course is handled by steady state method, the dynamics equation is: CE=CB0(1-e-k2t). Through experiment, it can be obtained by parameter calculation that k1 = 0.082min-1, k2 = 0.0050min-1. The research results provide theoretical and technical support for the recycling utilization of the red fuming nitric acid as discard liquid propellant. |
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| Keywords: | nitric acid starch oxalic acid reaction mechanism kinetics |
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