Structural investigation on lubricating oil base stocks by 13c NMR spectroscopy.
Structural investigation on lubricating oil base stocks by 13c NMR spectroscopy.
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通过 13C NMR 光谱对润滑油基础油进行结构研究。
DOI：
10.1627/jpi1958.24.151
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
Y. Takegami
中科院分区：
文献类型：
--
作者：
Toshimitsu Suzuki;M. Itoh;Yoshihisa Watanabe;T. Mitsudo;Y. Takegami
对真空馏出物（润滑油馏分）及其溶剂处理油进行1H和13C NMR谱分析，研究其平均分子结构。利用Brown-Ladner方程（faH）得到的1H NMR芳香性估计低于直接从13C NMR （faC）得到的芳香性。指出Brown-Ladner的参数（x和y） 2.0的假设在这种情况下是不合适的；结果是2.06-2.22。在13C核磁共振光谱的脂肪族区，可以观察到-(CH2)n-n_ _ _6（29.7ppm）和CH3-(CH2)n-n_ _ __3 （14.1ppm）等几个特征峰。利用这些峰的相对强度和平均结构参数，建立了溶剂处理油的平均结构模型。该模型较好地反映了润滑油精炼过程的特点。
1H and 13C NMR spectroscopy of vacuum distillates (lubricating oil fractions) and the solvent treated oils of them were carried out to investigate their average molecular structures. The aromaticity derived from 1H NMR using Brown-Ladner's equation (faH) was estimated to be lower than that derived directly from 13C NMR (faC). It was pointed out that the assumption that Brown-Ladner's parameters (x and y) 2.0 was not suitable in this case; and instead a value, 2.06-2.22 was obtained. In the aliphatic region of the 13C NMR spectra, several characteristic peaks assignable to-(CH2)n- n_??_6(29.7ppm)and CH3-(CH2)n-n_??_3(14.1ppm) and others can be observed. Using the relative intensities of these peaks and average structural parameters, average structural models of the solvent treated oils were proposed. The models well demonstrate the characteristics of the lubricating oil refining process.