分配ペーパークロマトグラフィーによるビスアルキルフェノールの分離と確認

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Various bis-alkylphenols have been extensively used as anti-oxidants for lubricating oils in recent years, therefore, increasing interest is being placed on the structural analysis of these compounds. This paper deals with the separation and identification of a variety of bis-alkylphenols having methyl and/or tert-butyl group by paper chromatography. Peculiar Rf value range was given to these bis-alkylphenols by partition paper chromatography using TCP as the stationary phase and 70% ethyl alcohol as the mobile phase. Since their Rf values are 0.04 to 0.05 and fairly lower than those of alkylphenols, it is possible to discriminate bis-alkylphenols from alkylphenols. Each bis-alkylphenol could be identified by the solvent systems of n-cetane, liquid paraffin or chlorinated paraffin as the stationary phase and 60 or 80% ethyl alcohol as the mobile phase. The Rf values of bis-alkylphenols are mainly affected by steric hindrance of hydroxyl group by alkyl substituents in the 2 and 6 positions. Bis-alkylphenols can be classified into the following three groups from the Rf values on the solvent system of liquid paraffin-80% ethyl alcohol. Group A canbe identified by the solvent system of chlorinated paraffin-80%ethylalcohol, group B by liquid paraffin-80% ethyl alcohol, and group C by chlorinated paraffin-60% ethyl alcohol.
社団法人日本油化学会の論文