catalКатализ в промышленностиKataliz v promyshlennosti1816-03872413-6476LLC "KALVIS"10.18412/1816-0387-2023-5-14-24catal-965Research ArticleКАТАЛИЗ В ХИМИЧЕСКОЙ И НЕФТЕХИМИЧЕСКОЙ ПРОМЫШЛЕННОСТИCATALYSIS IN CHEMICAL AND PETROCHEMICAL INDUSTRYОбразование эпоксициклооктана при совместном окислении циклооктена и алкилбензоловThe formation of epoxycyclooctane by the simultaneous oxidation of cyclooctene and alkylbenzenesКузнецоваН. И.KuznetsovaN. I.ctls@kalvis.ruЗудинВ. Н.ZudinV. N.ctls@kalvis.ruИнститут катализа им. Г.К. Борескова СО РАН, НовосибирскРоссияBoreskov Institute of Catalysis SB RAS, NovosibirskRussian Federation2023021020232351424Copyright © LLC "KALVIS", 20232023LLC "KALVIS"LLC "KALVIS"https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNoticehttps://www.catalysis-kalvis.ru/jour/article/view/965

Проведено совместное окисление циклооктена и алкилбензолов под действием кислорода и системы двух катализаторов. Радикальный катализатор Fe(acac)3/NHPI вызывал образование гидроперекисей алкилбензолов, которые in situ расходовались в катализируемом MoO3/SiO2 эпоксидировании циклооктена. Присутствие циклооктена и MoO3/SiO2 ограничивало интенсивность цепного окисления, позволяя, тем не менее, радикальному катализатору Fe(acac)3/NHPI сохранять достаточную активность в окислении алкилбензолов в гидроперекиси. Кумол оказался предпочтительнее этилбензола в качестве совосстановителя, обеспечивая более активное и селективное образование эпоксициклооктана. При оптимизированных количествах компонентов и температуре 80 °С селективность образования эпоксициклооктана в присутствии этилбензола или кумола достигала, соответственно, 92 и 96 % при конверсии циклооктена более 70 %.

The oxidation of cyclooctene by oxygen was performed simultaneously with ethyl benzene or cumene. Hydroperoxides of alkylbenzenes formed in situ under the action of radical initiator Fe(acac)3 /NHPI were consumed for the epoxidation of cyclooctene in the presence of MoO3 /SiO2 catalyst. The mutual influence of two catalysts of different nature was studied; the temperature and the amount of cyclooctene and MoO3 /SiO2 catalyst, which were favorable for the formation of epoxycyclooctane and allowed retaining sufficient activity of the radical catalyst in the oxidation of alkylbenzenes, were determined. Cyclooctene was affected only slightly by the radical oxidation during the joint oxidation and was converted to epoxycyclooctane with the selectivity above 90 %.

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