Study on Separation of Heteroatomic Compounds. (II). Determination of Nitrogen and Oxygen Compounds in Various Synthetic Naphthas.:Determination of Nitrogen and Oxygen Compounds in Various Synthetic Naphthas

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Trace amounts of nitrogen and oxygen compounds in various synthetic naphthas have been determined by combined use of column adsorption and gas chromatographic techniques. These compounds were quantitatively separated from the naphtha. The naphthas, which were produced by the hydrocracking of vacuum bottoms, contained 0.15-2.01wt% of nitrogen compounds and 0.5wt% of oxygen compounds. In contrast, the naphtha, which was produced by coking process, contained less nitrogen compounds and more oxygen compounds. The difference in yield was due to the different feedstocks rather than processes. The main types of nitrogen compounds were pyridine and pyrrole homologs in most naphthas and those of oxygen compounds were phenols.
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