Online 1H NMR Spectroscopic Study of the Reaction Kinetics in Mixtures of Acetaldehyde and Water Using a New Microreactor Probe Head

Online 1H NMR Spectroscopic Study of the Reaction Kinetics in Mixtures of Acetaldehyde and Water Using a New Microreactor Probe Head
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使用新型微反应器探头对乙醛和水混合物中的反应动力学进行在线 1H NMR 波谱研究

DOI:
10.1021/ie5033556
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发表时间:
2014
影响因子:
4.2
通讯作者:
H. Hasse
H. Hasse
中科院分区:
工程技术3区
文献类型:
--
作者:
A. Scheithauer;A. Brächer;T. Grützner;D. Zollinger;W.R. Thiel;E. von Harbou;H. Hasse

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乙醛和水的混合物是反应性多组分体系,因为形成聚(氧甲基亚甲基)二醇。这些低聚物的形成动力学的研究进行了使用一种新的微反应器NMR探头,结合在线流动1H NMR光谱与微反应技术。该研究涵盖了278和298 K之间的温度和3.5和10.3之间的pH值。从1H NMR谱中的峰面积,获得了乙醛转化率的定量结果。的新数据的基础上,反应动力学模型的开发和聚(氧亚甲基)二醇形成的动力学常数的数字一起确定的相关性,描述了它们对温度和pH值的依赖。
Mixtures of acetaldehyde and water are reactive multicomponent systems because poly(oxymethylmethylene) glycols are formed. A study on the kinetics of the formation of these oligomers was carried out using a new microreactor NMR probe head that combines online flow1H NMR spectroscopy with microreaction technology. The study covers temperatures between 278 and 298 K and pH values between 3.5 and 10.3. From the peak areas in the1H NMR spectra, quantitative results for the conversion of acetaldehyde were obtained. On the basis of the new data, a reaction kinetic model was developed and numbers for the kinetic constants of poly(oxymethylmethylene) glycol formation were determined together with a correlation that describes their dependence on the temperature and pH value.
乙醛水溶液中醛恶烷形成的核磁共振波谱研究
DOI: 10.1021/ie5004043
发表时间: 2014
影响因子: 4.2
作者:
A. Scheithauer;T. Grützner;C. Rijksen;D. Zollinger;E. von Harbou;W.R. Thiel;H. Hasse
通讯作者: H. Hasse
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影响因子: 2.2
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