Obtaining of highly-active catalysts of unsaturated compounds hydrogenation by using supercritical carbon dioxide
Parenago O. P., Timashev P. S., Karakhanov E. A., Maximov A. L., Lazhko A. E., Zolotukhina A. V., Bagratashvili V. N.
The Journal of Supercritical Fluids
Vol.140, P. 387-393
Опубликовано: 2018
Тип ресурса: Статья
DOI:10.1016/j.supflu.2018.07.010
Аннотация:
Polymer frameworks have been for the first time impregnated with rhodium and palladium compounds in a supercritical carbon dioxide medium. The polymeric carriers were the mesoporous phenol-formaldehyde resin and cross-linked dendrimer networks, based on poly(propylene imine) and poly(amido amine) dendrimers. The metal compounds were rhodium acetylacetonate and palladium carboxylates including their fluoro-substituted derivatives and palladium hexafluoroacetylacetonate. Using the IR-spectroscopy method, we have shown that the metal content in the polymers was in the range of 0.3–2.0 wt.[%] depending on the polymer nature, cross-linking agent type and cross-linking degree. We have obtained the samples of polymer supports with nanosized metal particles through hydrogen reduction of immobilized rhodium and palladium compounds at P(H2) = 6–10 MPa, T = 60 °C, 4 h time. The average rhodium particle size was 1–2 nm. It has been shown that the obtained nanocomposites were extremely active catalys
Ключевые слова:
Hydrogenation; Metal compound; Nanocomposite catalyst; Polymer impregnation; Polymer network; Supercritical carbon dioxide
Carbon dioxide; Carboxylation; Crosslinking; Dendrimers; Hydrogenation; Metallic compounds; Metals; Nanocatalysts; Nanocomposites; Particle size; Rhodium compounds; Spectroscopic analysis; Supercritical fluid extraction; Unsaturated compounds; Nanocomposite catalyst; Phenol formaldehyde resins; Poly(propylene imine); Polyamidoamine dendrimers; Polymer impregnation; Polymer networks; Supercritical carbon dioxides; Unsaturated hydrocarbons; Palladium compounds
Язык текста: Английский
ISSN: 1872-8162
Parenago O. P.
Timashev P. S. Petr Sergeevich 1978-
Karakhanov E. A.
Maximov A. L.
Lazhko A. E.
Zolotukhina A. V.
Bagratashvili V. N.
Паренаго О. П.
Тимашев П. С. Петр Сергеевич 1978-
Караханов Е. А.
Махимов А. Л.
Лажко А. Е.
Золотюхина А. В.
Баграташвили В. Н.
Obtaining of highly-active catalysts of unsaturated compounds hydrogenation by using supercritical carbon dioxide
Текст визуальный непосредственный
The Journal of Supercritical Fluids
Elsevier Science Publisher B.V.
Vol.140 P. 387-393
2018
Статья
Hydrogenation Metal compound Nanocomposite catalyst Polymer impregnation Polymer network Supercritical carbon dioxide
Carbon dioxide Carboxylation Crosslinking Dendrimers Hydrogenation Metallic compounds Metals Nanocatalysts Nanocomposites Particle size Rhodium compounds Spectroscopic analysis Supercritical fluid extraction Unsaturated compounds Nanocomposite catalyst Phenol formaldehyde resins Poly(propylene imine) Polyamidoamine dendrimers Polymer impregnation Polymer networks Supercritical carbon dioxides Unsaturated hydrocarbons Palladium compounds
Polymer frameworks have been for the first time impregnated with rhodium and palladium compounds in a supercritical carbon dioxide medium. The polymeric carriers were the mesoporous phenol-formaldehyde resin and cross-linked dendrimer networks, based on poly(propylene imine) and poly(amido amine) dendrimers. The metal compounds were rhodium acetylacetonate and palladium carboxylates including their fluoro-substituted derivatives and palladium hexafluoroacetylacetonate. Using the IR-spectroscopy method, we have shown that the metal content in the polymers was in the range of 0.3–2.0 wt.[%] depending on the polymer nature, cross-linking agent type and cross-linking degree. We have obtained the samples of polymer supports with nanosized metal particles through hydrogen reduction of immobilized rhodium and palladium compounds at P(H2) = 6–10 MPa, T = 60 °C, 4 h time. The average rhodium particle size was 1–2 nm. It has been shown that the obtained nanocomposites were extremely active catalys