Национальный цифровой ресурс Руконт - межотраслевая электронная библиотека (ЭБС) на базе технологии Контекстум (всего произведений: 634699)
Контекстум
.
0   0
Первый авторSimakova
АвторыDemidova YuliyaS., Prikhod’ko SergeyA., Simonov MikhailN., Shabalin AntonYu.
Страниц11
ID576569
АннотацияLiquid phase pentanol condensation in solutions of nonpolar hydrocarbons as well as in solventfree conditions was studied in the presence of platinum group metals (platinum, palladium, iridium, ruthenium, and rhodium) supported on mesoporous carbon support Sibunit as well as on metal oxides – alumina, zirconia and ceria. This reaction was carried out in a batch mode in the temperature range 140-200 °C, under nitrogen pressure 1 – 10 bar in the presence of catalysts and a base – NaOH. It was shown that pentanol condensation mainly resulted in formation of the target product 2-propylheptanol (Guerbet alcohol), whereas pentanal, 2-propyl-2-heptenal, 2-propyl-1-heptanal, 2-propyl-1-heptenol were observed in minor quantities. The effect of metals as catalysts and reaction conditions on pentanol conversion and selectivity to 2-propylheptanol was studied. The reaction temperature increase not only as expected accelerates the reaction rate but in addition improves selectivity to 2-propylheptanol. Conversion of pentanol increased in the row Ir/CeO2 << Rh/Al2O3 < Pd/ZrO2 < Ru/C < Ir/C < Pd/C < Pt/C < Pt/Al2O3. Selectivity to 2-propylheptanol was elevated over metallic catalysts in the sequence Ir/CeO2 << Ir/C < Ru/C < Rh/Al2O3 ~ Pd/C ~ Pt/C ~ Pd/ZrO2 ~ Pt/Al2O3 being substantially infl uenced by temperature increase. The highest yield of 2-propylheptanol under comparable conditions was demonstrated for Pd/C, Pt/C и Pt/Al2O3 catalysts.
УДК661.725.5-43
LIQUID PHASE PENTANOL GUERBET-MARKOVNIKOV CONDENSATION OVER VIII GROUP METALS / IrinaL. Simakova [и др.] // Журнал Сибирского федерального университета. Химия. Journal of Siberian Federal University/ Chemistry .— 2016 .— №2 .— С. 61-71 .— URL: https://rucont.ru/efd/576569 (дата обращения: 25.04.2024)

Предпросмотр (выдержки из произведения)

Demidovaa,b Mikhail N. Simonova,b Irina L. Simakova*a,b , Sergey A. Prikhod’koa,b and Anton Yu. <...> Lavrentieva, Novosibirsk, 630090, Russia b Novosibirsk State University 2 Pirogova, Novosibirsk, 630090, Russia Received 22.03.2016, received in revised form 10.05.2016, accepted 04.06.2016 Liquid phase pentanol condensation in solutions of nonpolar hydrocarbons as well as in solventfree conditions was studied in the presence of platinum group metals (platinum, palladium, iridium, ruthenium, and rhodium) supported on mesoporous carbon support Sibunit as well as on metal oxides – alumina, zirconia and ceria. <...> It was shown that pentanol condensation mainly resulted in formation of the target product 2-propylheptanol (Guerbet alcohol), whereas pentanal, 2-propyl-2-heptenal, 2-propyl-1-heptanal, 2-propyl-1-heptenol were observed in minor quantities. <...> The effect of metals as catalysts and reaction conditions on pentanol conversion and selectivity to 2-propylheptanol was studied. <...> The highest yield of 2-propylheptanol under comparable conditions was demonstrated for Pd/C, Pt/C и Pt/Al2 Keywords: pentanol, condensation, 2-propylheptanal, Guerbet alcohols, effect of metal, Ir, Rh, Pd, Pt, Ru, mesoporous Sibunit, alumina, zirconia, ceria. <...> All rights reserved * Corresponding author E-mail address: simakova@catalysis.ru # 201 # Irina L. Simakova, Yuliya S. <...> Изучение жидкофазной конденсации пентанола по реакции Гербе-Марковникова на металлах VIII группы С.А. Приходькоa,б И.Л. Симаковаa,б , М.Н. Симоновa,б , Ю.С. Демидоваa,б , А.Ю. Шабалинa,б , аИнститут катализа им. <...> Пирогова, Новосибирск, 630090, Россия Изучен процесс жидкофазной конденсации н-пентанола в неполярных средах, а также в отсутствие растворителя на металлах платиновой группы (платина, палладий, иридий, рутений и родий), нанесенных на мезопористый углеродный носитель сибунит, а также оксиды металлов с различными кислотно-основными свойствами – алюминия, циркония, церия <...>