The Oxidative Esterification of Propionaldehyde to Methyl Propionate in the Liquid-Phase Using a Heterogeneous Palladium Catalyst
スポンサーリンク
概要
- 論文の詳細を見る
The optimization of the oxidative esterification of propionaldehyde to methyl propionate using a supported palladium catalyst in methanol under heavy-metal-free and pressurized-oxygen conditions, which we recently reported in a previous paper, were carried out together with a study of the reaction route, the nature of the catalytic active sites, and the effect of the support. In our previous paper, we reported significantly improved activity for oxidative esterification using commercially available 5%Pd/Al2O3 at 1.5 MPa of O2 gas and 333 K and emphasized that the doping of 5%Pd/Al2O3 with lead was not needed for the reaction system, but we could not improve the activity that was reported when using 5%Pd/γ-Al2O3 doped with 5% Pb (a 93.2% conversion of propionaldehyde, 76.8% selectivity for methyl propionate and a 71.6% yield of methyl propionate) at 0.3 MPa of O2 gas and 353 K, as reported by another laboratory. In the present study, however, we exceeded those values and obtained a 98.3% conversion of propionaldehyde, 75.3% selectivity for methyl propionate and a 74.0% yield of methyl propionate using 5%Pd/γ-Al2O3 undoped with Pb at 1.5 MPa of O2 gas and 333 K. It should be noted that, in the preparation of the present 5%Pd/γ-Al2O3, Pd was doped onto Al2O3 that had been previously treated with aqueous NaOH. Another active alumina support,η-Al2O3, prepared from boehmite, afforded activity that was substantially lower than that of γ-Al2O3 and depended on the calcination temperature of boehmite to η-Al2O3. When using various concentrations of CH3OH in the aqueous reaction solution, the oxidative esterification proceeded through the formation of propionic acid. To determine why the Al2O3 support afforded better activity than the active carbon support, Pd/Al2O3 and Pd/C catalysts were examined by XAFS (X-ray absorption fine structure). XAFS revealed that Pd on Al2O3 shows a better redox nature than Pd on C, which resulted in activity on Pd/Al2O3 that was better than that on Pd/C.
著者
-
Nakagawa Keizo
Department Of Advanced Materials Institute Of Technology And Science The University Of Tokushima
-
Sugiyama Shigeru
Department Of Advanced Materials Institute Of Technology And Science The University Of Tokushima
-
Ninomiya Wataru
Coporate Research Laboratories Mitsubishi Rayon Co. Ltd.
-
Sotowa Ken-ichiro
Department Of Advanced Materials Institute Of Technology And Science The University Of Tokushima
-
Katoh Masahiro
Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima
-
Watanabe Emiko
Department of Chemical Science and Technology, The University of Tokushima
-
Ninomiya Wataru
Coporate Research Laboratories, Mitsubishi Rayon Co., Ltd.
-
Bando Takuya
Department of Chemical Science and Technology, The University of Tokushima
-
Seno Yusuke
Department of Chemical Science and Technology, The University of Tokushima
-
Katou Yuuki
Coporate Research Laboratories, Mitsubishi Rayon Co., Ltd.
-
Akihara Shuji
Coporate Research Laboratories, Mitsubishi Rayon Co., Ltd.
関連論文
- Application of a Microreactor in the Oxidative Dehydrogenation of Propane to Propylene on Calcium Hydroxyapatite and Magnesium ortho-Vanadate Doped and Undoped with Palladium
- Application of Heavy-Metal-Free Pd/C Catalyst for the Oxidative Dehydrogenation of Sodium Lactate to Pyruvate in an Aqueous Phase under Pressurized Oxygen
- Effects of Organosilica-derived Microporous Coverage of Carbon-supported Pt Catalysts on Dehydrogenation of Cyclohexane
- Effects of several harmful anions on the removal of aqueous phosphate by boehmite
- Redox Nature of Fe-Incorporated Magnesium ortho-Vanadate as a Catalyst for the Oxidative Dehydrogenation of Propane
- Effects of Coverage of Silica-supported Ni Catalysts with Silica upon Formation of Carbon Nanofibers with Uniform Diameter by Ethylene Decomposition
- Synthesis and Structural Characterization of Hollow Hexagonal Cylinder Co-SiO_2 Composites Prepared in a Micelle Solution
- Plasma-Enhanced Diamond Nucleation on Si
- Quantification of mouse pulmonary cancer models by microcomputed tomography imaging
- Effects of Redox of Cu-Species in Copper-Strontium Hydroxyapatites on the Oxidative Dehydrogenation of Propane
- Oxidative Dehydrogenation of Propane on Magnesium Vanadates in the Presence of Tetrachloromethane
- Characterization of Calcium, Strontium, Barium and Lead Hydroxyapatites: X-ray Diffraction,Photoelectron, Extended X-ray Absorption Fine Structure and MAS NMR Spectroscopies
- Enhancement of the Catalytic Activities in the Oxidative Dehydrogenation of Propane on Cerium Oxide in the Presence of Tetrachloromethane
- Oxidative Coupling of Methane on MgO-MgSO_4 Catalysts in the Presence and Absence of Carbon Tetrachloride
- OXIDATIVE DEHYDROGENATION OF ETHANE IN THE PRESENCE AND ABSENCE OF TETRACHLOROMETHANE OVER MAGNESIUM SULPHATE
- Performance of a Bench-Scale Annular-Type Packed-Bed Photocatalytic Reactor for Decomposition of Indigo Carmine Dissolved in Water
- Immobilization of Aqueous Heavy Metal Cations with Phosphates and Sulfates
- Preparation of Boehmite Sol Employed for Formation of Alumina-Layer over Various Plates with the Dip-Coating
- Removal-Regeneration of Aqueous Phosphate with Bulk and Thin-Layer Boehmite
- Conversion of glomerular histology from a mesangiopathic to a membranopathic pattern in serum sickness nephritis with prolonged sensitization
- Employment of ^P MAS NMR for the Identification of Amorphous Precipitation Products Obtained from the MAP Process
- Application of Heavy-Metal-Free Pd/C Catalyst for the Oxidative Dehydrogenation of Sodium Lactate to Pyruvate in an Aqueous Phase under Pressurized Oxygen
- Flows in a Rotating Cylinder with a Sloping Bottom
- Non-axisymmetric flow in a rotating cylinder : Incompressible and compressible fluids
- Facet-Selective Growth Rates of Doped Diamond Crystals Prepared by Microwave Plasma-Assisted Chemical Vapor Deposition
- Application of a Microreactor in the Oxidative Dehydrogenation of Propane to Propylene on Calcium Hydroxyapatite and Magnesium ortho-Vanadate Doped and Undoped with Palladium
- Recycling of Thin-Layer of Magnesium Hydrogenphosphate for Removal and Recovery of Aqueous Ammonium
- Fabrication of a Microevaporator Equipped with a Piezoelectrically-Driven Diaphragm Pump
- Selective Oxidation of CO in H_2 by Permeation through Catalytically Active Zeolite Membranes
- Fabrication of Parallel Microchannel Reactors for Use in Catalyst Testing
- Separation of Mixtures of Benzene and n-Alkanes Using an FAU-Type Zeolite Membrane
- Analyses of ν_1-Band of Methane Adsorbed on Ion-exchanged L-Zeolites
- Occurrence of Tetanic Convulsions in Totally Parathyroidectomized Frogs,Rana nigromaculata(短報)
- Improved Adsorption of Basic Protein on Hydroxyapatite Nanoparticles Synthesized Using a Lamellar Template of Sodium Dodecylphosphate
- Effective Surface Modification of Titanate Nanosheets Using the Lamellar Self-assembly of a Cationic Amine Surfactant as a Template
- Hydroxyapatite particle characteristics influence the enhancement of the mechanical and chemical properties of conventional restorative glass ionomer cement
- Structural insight into the stereoselective production of PGF_ by Old Yellow Enzyme from Trypanosoma cruzi
- Selective preparation of 2,3-epoxypropanamide and its facile conversion to 2,3-dihydroxypropanamide with acidic resins.
- Preparation of Pd Nanoparticles Covered with Organosilica Layers and Their Catalytic Properties for Cyclohexane Dehydrogenation
- The Oxidative Esterification of Propionaldehyde to Methyl Propionate in the Liquid-Phase Using a Heterogeneous Palladium Catalyst
- Reaction behavior of propylene oxide in various solvents in the presence of boron trifluoride.
- The effect of pressure on sigmatropic rearrangements of seven-membered conjugated systems. [3, 3] And [1, 9]sigmatropies.
- Oxidative Coupling and Partial Oxidation of Methane over Solid Catalysts in the Presence and Absence of Tetrachloromethane as a Gas-Phase Additive
- The Oxidative Esterification of Propionaldehyde to Methyl Propionate in the Liquid-Phase Using a Heterogeneous Palladium Catalyst