オレイン酸メチルの空気酸化及びオレイン酸メチルヒドロペルオキシドの分解に及ぼす第5, 6, 7族金属塩化物の影響

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The effects of MoC5, VCl3, CrCl3·6 H2O, WCl6, and MnCl2 on the autoxidation of pure methyl oleate and decomposition of methyl oleate hydroperoxide at 80°C were evaluated on the basis of changes in characteristic numbers, oxirane oxygen content, and reaction products. The chlorides of Cr, V, and W acted as redox catalysts on the decomposition of hydroperoxide and enhanced the autoxidation of methyl oleate remarkably. The prooxi dant activity of the metal chlorides appeared in the order of Cr > V > W > Mn. Molybdenum chloride accelerated the decomposition of hydroperoxide but inhibited the autoxidation of methyl oleate. Manganese chloride had no effect on either reaction. The products resulting from these two reactions were trans-and cis-epoxyoctadecanoates, hydroxyoctadecenoates, hydroxiyepoxyoctadecanoates, oxooctadecenoates, and cleaved products.