Petroleum ChemistryPetroleum ChemistryНефтехимия0028-24213034-5626The Russian Academy of Sciences65562410.31857/S0028242123020041HJUSTDArticlesСтатьиResearch ArticleOxidation of Sulfur Compounds by Sodium Hypochlorite over Molybdenum-Based Amphiphilic CatalystsОкисление серосодержащих соединений гипохлоритом натрия в присутствии амфифильных молибденсодержащих катализаторовGevorgyanK. P.ГеворгянК. Пpetrochem@ips.ac.ruPolikarpovaP. D.ПоликарповаП. Д.polikarpova-polina@rambler.ruDepartment of Chemistry, Lomonosov Moscow State UniversityМосковский государственный университет им. М.В. Ломоносова15042023632NO2 (2023)№2 (2023)20221011022025Copyright ©; 2023, Russian Academy of SciencesCopyright ©; 2023, Российская академия наук2023Russian Academy of SciencesРоссийская академия наукhttps://journals.eco-vector.com/0028-2421/article/view/655624

The study reports on the oxidation of sulfur compounds by sodium hypochlorite over molybdenum-based amphiphilic catalysts. The conversion of dibenzothiophene (DBT) was investigated as a function of the catalyst composition and reaction conditions. When sodium hypochlorite was used in combination with the heptamolybdate-anion-containing amphiphilic catalyst, sulfur compounds were found to be effectively oxidized even at room temperature. Under optimum process conditions (an oxidant to sulfur molar ratio of 4 : 1, a catalyst concentration of 0.5 wt %, and an acetonitrile volume of 1 mL), 100% conversion of DBT to sulfone had already been achieved after ten min of oxidation. The addition of acetonitrile to the reaction mixture was found to minimize the aggregation of catalyst particles and enhance the process performance. The catalyst demonstrated sustained activity over five oxidation cycles without regeneration.

В работе исследовано окисление серосодержащих соединений гипохлоритом натрия в присутствии амфифильных молибденсодержащих катализаторов. Проведено исследование зависимости величины конверсии дибензотиофена (ДБТ) в процессе окисления от состава катализатора и условий проведения реакции. Применение гипохлорита натрия в сочетании с амфифильным катализатором, содержащим гептамолибдат анион, позволяет окислять сернистые соединения уже при комнатной температуре. В выбранных оптимальных условиях (мольное соотношение окислитель : сера 4 : 1, дозировка катализатора 0.5 мас. %, 1 мл ацетонитрила) удается достичь 100% конверсии ДБТ до сульфона всего за 10 мин окисления. Доказано, что добавление ацетонитрила в реакционную смесь позволяет минимизировать агрегацию частиц катализатора и повысить эффективность процесса. Показано, что катализатор сохраняет свою активность в течение 5 циклов окисления без регенерации.

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