Effects of pressure on the disproportionation of olefins over MoO3-Al2O3 and Re2O7-Al2O3 catalysts.
スポンサーリンク
概要
- 論文の詳細を見る
The disproportionation of propylene and 1-butene over MoO<SUB>3</SUB>–Al<SUB>2</SUB>O<SUB>3</SUB> and Re<SUB>2</SUB>O<SUB>7</SUB>–Al<SUB>2</SUB>O<SUB>3</SUB> catalysts was carried out in order to investigate the effects of reaction pressure in the range from 1.0 to 130 kg/cm<SUP>2</SUP>. The effects of the pressure on the reaction can be identified as two independent of the reaction phase; the catalytic activity increased with the reaction pressure, and the time needed to reach the maximum conversion (<I>T</I><SUB>max</SUB>) as well as the time when the conversion falls to half the maximum value (τ<SUB>1⁄2</SUB>) decreased with the increase in the reaction pressure. It can be concluded that the catalytic activity by the polymers formed over the catalyst falls off rapidly with the increase in the pressure. In both phases, the disproportionation of olefins over the Re<SUB>2</SUB>O<SUB>7</SUB>–Al<SUB>2</SUB>O<SUB>3</SUB> catalyst exhibits the following features as compared with that over the MoO<SUB>3</SUB>–Al<SUB>2</SUB>O<SUB>3</SUB> catalyst: (1) a much higher activity at temperatures of 0–140 °C; (2) a much higher selectivity for disproportionation, and (3) a lower apparent activation energy.
- 公益社団法人 日本化学会の論文
著者
-
Sodesawa Toshiaki
Department Of Applied Chemistry Faculty Of Engineering Chiba University
-
Kamiya Yoshio
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
-
Ogata Eisuke
Department of Reaction Chemistry, Faculty of Engineering, University of Tokyo
関連論文
- Phase separation in the system with sodium silicate and sodium dodecyl sulfate under acidic conditions
- A Change in Gastric Mucosal Ascorbic Acid Status with the Formation, Progression, and Recovery of Compound 48/80-induced Acute Gastric Mucosal Lesions in Rats
- Structural and Catalytic Properties of Silica-Coated Alumina
- Nickel Oxide Particles Coated with Silica
- Fabrication of Microreactor Using Glass Capillary with Cu/SiO_2 Layer
- Dispersion Control of Ni Particles in Porous Silica by Solution Exchange of Wet Silica Gel
- Fe_2O_3Particles Coated with Silica Using TEOS
- Preparation of Microporous Silica Gel by Sol-Gel Process in the Presence of Ethylene Oligomers
- Vapor-Phase Synthesis of Symmetric Ketone from Alcohol over CeO_2-Fe_2O_3 Catalysts
- Pore Size Control of High Surface-Area Silica by Use of Citric Acid
- Analysis of Volatile Organic Compounds (VOCs) in the Urban Atmosphere of Beijing
- Formation of 2,6-Naphthalenedicarboxylic Acid by the Co-Mn-Br-Catalyzed Autoxidation of 2,6-Diethylnaphthalene in Acetic Acid
- Formation of Benzenecarboxylic Acids from Bituminous Coal by Means of Oxygen-oxidation in Alkaline Medium
- Ozonization of organic compounds. VI. Relative reactivity of protic solvents toward carbonyl oxide.
- Phenolic solvent-assisted hydrogenolysis of trans-stilbene.
- Photoinduced electron transfer oxidation. I. 9,10-Dicyanoanthracene-sensitized photooxidation of hindered phenols.
- Spectrophotometric study on the complex formation of hydroperoxide with tetraphenylporphyrin cobalt(II).
- Interaction of galvinoxyl radical with ascorbic acid, cysteine, and glutathione in homogeneous solution and in aqueous dispersions.
- Ligand effects of 2,2'-bipyridine in the decomposition of 1,2,3,4-tetrahydro-1-naphthyl hydroperoxide catalyzed by cobalt(II) salt.
- Ozonization of organic compounds. VII. Carboxylic acids, alcohols, and carbonyl compounds.
- Ozonization of organic compounds. V. Aromatic compounds.
- The liquid-phase oxidation of methylbenzenes by the cobalt-copper-bromide system.
- Oxidation of lipids. XIII. Antioxidant activities of .ALPHA.-, .BETA.-, .GAMMA.-, and .DELTA.-tocopherols.
- The oxidation of toluene by cobalt-copper-bromide system. A side-chain acetoxylation.
- Oxidation of lipids. I. Quantitative determination of the oxidation of methyl linoleate and methyl linolenate.
- Oxidation of lipids. V. Oxidation of methyl linoleate in aqueous dispersion.
- The Metal-Catalyzed Autoxidation of Cumene
- Oxidative degradation of polymers. V. Ozonization of polypropylene and polystyrene in carbon tetrachloride.
- Oxidation of lipids. XII. Inhibition of oxidation of soybean phosphatidylcholine and methyl linoleate in aqueous dispersions by uric acid.
- Oxidation of lipids. IX. Decomposition of methyl linoleate and methyl linolenate hydroperoxides in solution.
- Oxidation of lipids. XIV Inhibition of oxidation of methyl linoleate by fatty acid esters of L-ascorbic acid.
- Oxidation of lipids. II. Rate of inhibition of oxidation by .ALPHA.-tocopherol and hindered phenols measured by chemiluminescence.
- Oxidation of lipids. VIII. Synergistic inhibition of oxidation of phosphatidylcholine liposome in aqueous dispersion by vitamin E and vitamin C.
- A study of the color of coal liquids. II Involvement of light, oxygen, phenols, and aromatic amines in formation of colored materials from Wandoan-coal-derived liquids.
- The photocycloaddition of 6-substituted phenanthridines to electron-rich olefins.
- Oxidative degradation of polymers. VI. Photooxidation of polystyrene powder and some model compounds.
- Liquid phase disproportionation of propylene over MoO3-Al2O3 catalyst in the presence of solvents.
- Effects of pressure on the disproportionation of olefins over MoO3-Al2O3 and Re2O7-Al2O3 catalysts.
- Disproportionation of propylene over MoO3-SiO2 catalyst with various treatments.
- Reaction of dioxygen complexes with catechols.
- Studies on the liquid phase oxidation of nitroalkylbenzenes catalyzed by transition metal and bromide ions.
- Autoxidation of atactic polypropylene and related alkanes. Rates and reactivities toward peroxy radicals.
- Catalysis of Manganese Salts in the Autoxidation of Cyclohexanone