Quantitative Medium-Resolution NMR Spectroscopy Under Non-Equilibrium Conditions, Studied on the Example of an Esterification Reaction
Quantitative Medium-Resolution NMR Spectroscopy Under Non-Equilibrium Conditions, Studied on the Example of an Esterification Reaction
复制标题
以酯化反应为例研究非平衡条件下的定量中分辨率核磁共振波谱
DOI:
10.1007/s00723-014-0522-x
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发表时间:
2014
影响因子:
1
通讯作者:
G. Guthausen
中科院分区:
文献类型:
--
作者:
F. Dalitz;L. Kreckel;M. Maiwald;G. Guthausen
Medium-resolution nuclear magnetic resonance spectroscopy is a promising tool for the monitoring of liquid reactions. For process analytical applications, the requirements of robustness and insensitivity of the spectrometer in relation to high temperatures and pressures are challenging. Within this study, a flow probe using a glass dewar is presented. Temperatures of flowing samples up to 130 °C and pressures up to 40 bar were successfully applied, and the corresponding temperature loss of the flowing sample at 2 ml min−1was <2.4 °C at 130 °C. Furthermore, if the process requires a measurement in a non-equilibrium state of magnetization, a comprehensive data treatment is given. For this purpose, the influences of the flow andT1of the substances under investigation are studied in detail on the example of a homogeneously catalyzed esterification. In addition, data analysis schemes were designed such that the experiments directly revealed mole fractions from the spectra. Limited spectral resolutions and low signal-to-noise ratio still did not obstruct quantitative interpretation of the experiments.
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影响因子:
4.7
作者:
K. Alejski;F. Duprat
通讯作者:
K. Alejski;F. Duprat
影响因子:
7.4
作者:
M. Guðjónsdóttir;P. Belton;G. Webb
通讯作者:
G. Webb
影响因子:
3.5
作者:
G. Guthausen;Agnes von Garnier;R. Reimert
通讯作者:
R. Reimert
影响因子:
--
作者:
Markus Cudaj;G. Guthausen;Andreas Kamlowski;D. Maier;T. Hofe;M. Wilhelm
通讯作者:
M. Wilhelm
影响因子:
4.7
作者:
F. Dalitz;M. Maiwald;G. Guthausen
通讯作者:
G. Guthausen