From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 83155 10.52957/27821900_2020_01_161 Научные статьи Scientific articles Научные статьи Study of cyclohexylbenzene liquid-phase oxidation products composition Study of cyclohexylbenzene liquid-phase oxidation products composition Кошель Георгий Николаевич Koshel Georgy Nikolaevich

доктор химических наук;

doctor of chemical sciences;

 Курганова Екатерина Анатольевна Kurganova Ekaterina Anatol'evna kurganovaea@ystu.ru https://orcid.org/0000-0002-0491-7452 Фролов Александр Сергеевич Frolov Aleksandr Sergeevich frolovas@ystu.ru

кандидат химических наук;

candidate of chemical sciences;

 Коршунова Александра Игоревна Korshunova Aleksandra Igorevna Ярославский государственный технический университет Yaroslavl State Technical University 31 12 2020 31 12 2020 1 1 161 167 14 09 2020 19 10 2020 https://chemintech.ru/en/nauka/article/83155/view

The paper examines the contents of products of liquid-phase oxidation of cyclohexylbenzene. The study proves the existence of tertiary and secondary hydroperoxide in the oxidation products of cyclohexylbenzene. The hydroperoxides were determined directly by NMR1H-spectroscopy and indirectly by their products of reduction to ketones and alcohols. By comparing integral intensities of tertiary and secondary cyclohexylbenzene hydroperoxide proton signals, we can assume that the content of the latter is approximately 15-20% of the total hydroperoxide content present in the cyclohexylbenzene oxidation products. The general scheme of oxidative transformations of cyclohexylbenzene is compiled based on the experimental data obtained and the existing knowledge of the essence of liquid-phase oxidation of alkylsubstituted aromatic and cycloaliphatic hydrocarbons. The study shows a considerable decrease in selectivity of oxidation process when cyclohexylbenzene conversion increases up to 40-50%.

The paper examines the contents of products of liquid-phase oxidation of cyclohexylbenzene. The study proves the existence of tertiary and secondary hydroperoxide in the oxidation products of cyclohexylbenzene. The hydroperoxides were determined directly by NMR1H-spectroscopy and indirectly by their products of reduction to ketones and alcohols. By comparing integral intensities of tertiary and secondary cyclohexylbenzene hydroperoxide proton signals, we can assume that the content of the latter is approximately 15-20% of the total hydroperoxide content present in the cyclohexylbenzene oxidation products. The general scheme of oxidative transformations of cyclohexylbenzene is compiled based on the experimental data obtained and the existing knowledge of the essence of liquid-phase oxidation of alkylsubstituted aromatic and cycloaliphatic hydrocarbons. The study shows a considerable decrease in selectivity of oxidation process when cyclohexylbenzene conversion increases up to 40-50%.

 cyclohexylbenzene liquid-phase oxidation tertiary cyclohexylbenzene hydroperoxide secondary cyclohexylbenzene hydroperoxide

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