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Hydrogenation Of Alpha Methyl Styrene Over Palladium Catalyst In A Packed Bed With Cocurrent Downflowing Liquid And Gas Phases
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Book Synopsis Hydrogenation of Alpha Methyl Styrene Over Palladium Catalyst in a Packed Bed with Cocurrent Downflowing Liquid and Gas Phases by : David George Reed Short
Download or read book Hydrogenation of Alpha Methyl Styrene Over Palladium Catalyst in a Packed Bed with Cocurrent Downflowing Liquid and Gas Phases written by David George Reed Short and published by . This book was released on 1973 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Catalytic Hydrogenation of Alpha-methylstyrene in Liquid Phase in Stirred Reactor by : Douglas Lewellyn Johnson
Download or read book Catalytic Hydrogenation of Alpha-methylstyrene in Liquid Phase in Stirred Reactor written by Douglas Lewellyn Johnson and published by . This book was released on 1956 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mass Transfer in the Catalytic Liquid-phase Hydrogenation of Alpha-methylstyrene in a Stirred Reactor by : Jacob David Polejes
Download or read book Mass Transfer in the Catalytic Liquid-phase Hydrogenation of Alpha-methylstyrene in a Stirred Reactor written by Jacob David Polejes and published by . This book was released on 1959 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1973 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kinetics of the Hydrogenation of Alpha-methylstyrene in Fixed Beds by : Byron Dale Babcock
Download or read book Kinetics of the Hydrogenation of Alpha-methylstyrene in Fixed Beds written by Byron Dale Babcock and published by . This book was released on 1955 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Hydrogenation of [alpha], [beta][alpha, Beta]-unsaturated Aldehydes Towards Clean Synthesis Over Noble Metal Catalysts in Mass Transfer Efficient Three Phase Reactors by : Laiqi Zhang
Download or read book Selective Hydrogenation of [alpha], [beta][alpha, Beta]-unsaturated Aldehydes Towards Clean Synthesis Over Noble Metal Catalysts in Mass Transfer Efficient Three Phase Reactors written by Laiqi Zhang and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrodynamics and mass transfer characteristics of a concurrent downflow contactor (CDC) are studied in this work in order to investigate the viability of this bubble column as a catalytic reactor for the hydrogenation of?,?-unsaturated aldehydes. Oxygen/water was used as the system throughout. In order to obtain reproducible results, a very effective gas-liquid separation method was conceived and developed after much trial and error work. Shutdown and deadleg gas holdup measuring methods were compared and it was found that the shutdown method is more reliable than the deadleg method. The hydrogenation of cinnamaldehyde using both in-house-prepared and commercial palladium, platinum and ruthenium catalysts was carried out in stirred tank reactors and cocurrent downflow reactors in order to study the kinetics and mass transfer characteristics and the selectivity towards the corresponding desired product, hydrocinnamaldehyde or cinnamyl alcohol. When palladium catalysts were used the desired product was hydrocinnamaldehyde. The effects of homogenous reactions, type of solvent, catalyst loading, temperature, pressure, reactant concentration and the effects of promoter or poison on the selectivity towards hydrocinnamaldehyde were investigated systematically. Aldehyde acetals were produced in polar solvents, but not in non-polar solvents. Two methods can be used to obtain hydrocinnamaldehyde selectivity without reduction of the carbonyl double bond: (1) by using non-polar solvents such as toluene; (2) by incorporating poisons or promoters into the reactant solution or onto the surface of the catalysts. 97% selectivity to hydrocinnamaldehyde was achieved. The effects of the solvent, temperature, pressure, catalyst loading, promoters, and reactants concentration on the kinetics were studied and the following reaction kinetics are proposed for the hydrogenation of cinnamaldehyde over non-modified palladium/charcoal catalysts in propan-2-ol and in toluene: Ra = kC\(_{Cat}\)C\(_{H2}\)C\(0_{CAL}\) The apparent activation energy varies with themperature range in propan-2-ol and is 65\(\pm\)5 kJ.mol\({-1}\) in toluene.
Download or read book Chemical Engineering Progress written by and published by . This book was released on 1971 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Hydrogenation of Α,β[alpha,beta]-unsaturated Aldehydes Towards Clean Synthesis Over Noble Metal Catalysts in Mass Transfer Efficient Three Phase Reactors by : Laiqi Zhang
Download or read book Selective Hydrogenation of Α,β[alpha,beta]-unsaturated Aldehydes Towards Clean Synthesis Over Noble Metal Catalysts in Mass Transfer Efficient Three Phase Reactors written by Laiqi Zhang and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrodynamics and mass transfer characteristics of a concurrent downflow contactor (CDC) are studied in this work in order to investigate the viability of this bubble column as a catalytic reactor for the hydrogenation of ?,?-unsaturated aldehydes. Oxygen/water was used as the system throughout. In order to obtain reproducible results, a very effective gas-liquid separation method was conceived and developed after much trial and error work. Shutdown and deadleg gas holdup measuring methods were compared and it was found that the shutdown method is more reliable than the deadleg method. The hydrogenation of cinnamaldehyde using both in-house-prepared and commercial palladium, platinum and ruthenium catalysts was carried out in stirred tank reactors and cocurrent downflow reactors in order to study the kinetics and mass transfer characteristics and the selectivity towards the corresponding desired product, hydrocinnamaldehyde or cinnamyl alcohol. When palladium catalysts were used the desired product was hydrocinnamaldehyde. The effects of homogenous reactions, type of solvent, catalyst loading, temperature, pressure, reactant concentration and the effects of promoter or poison on the selectivity towards hydrocinnamaldehyde were investigated systematically. Aldehyde acetals were produced in polar solvents, but not in non-polar solvents. Two methods can be used to obtain hydrocinnamaldehyde selectivity without reduction of the carbonyl double bond: (1) by using non-polar solvents such as toluene; (2) by incorporating poisons or promoters into the reactant solution or onto the surface of the catalysts. 97% selectivity to hydrocinnamaldehyde was achieved. The effects of the solvent, temperature, pressure, catalyst loading, promoters, and reactants concentration on the kinetics were studied and the following reaction kinetics are proposed for the hydrogenation of cinnamaldehyde over non-modified palladium/charcoal catalysts in propan-2-ol and in toluene: Ra = kC\(-{Cat}\)C\(-{H2}\)C\( 0-{CAL}\) The apparent activation energy varies with themperature range in propan-2-ol and is 65\(\pm\)5 kJ.mol\( {-1}\) in toluene.
Book Synopsis Hydrogenation of Alpha-methylstyrene in a Trickle-bed Reactor Employing a Non-porous Catalyst by : Albert Russell Hoge
Download or read book Hydrogenation of Alpha-methylstyrene in a Trickle-bed Reactor Employing a Non-porous Catalyst written by Albert Russell Hoge and published by . This book was released on 1970 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ambient Pressure Hydrogenation of Alpha-methylstyrene Using Hydrogen Transfer Agent by : Debalina Dasgupta
Download or read book Ambient Pressure Hydrogenation of Alpha-methylstyrene Using Hydrogen Transfer Agent written by Debalina Dasgupta and published by . This book was released on 2005 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mediator-assisted electrochemical pathway for reduction of alpha-methyl styrene to cumene is investigated. Ambient pressure and low temperature hydrogenation is carried out in an emulsion of the reactant, an organic solvent and water, to which a suitable surfactant is added. The mediator employed in the study hydrogenates alpha-methylstyrene via a chemical step on the solid catalyst while the former is regenerated electrochemically at the cathode. Alpha-methylstyrene was successfully hydrogenated to cumene using both catalytic transfer hydrogenation and mediator assisted electrochemical hydrogenation. Complete conversion was achieved at a mediator concentration of 0.5M and at an applied potential of -1.3V vs. SCE at 60°C. The influence of the applied current density, concentration and the type of electrode on the rate of hydrogenation is investigated. A mathematical model that takes into consideration the reaction chemistry is proposed and validated using the experimental data.
Book Synopsis Directory of Graduate Research by : American Chemical Society. Committee on Professional Training
Download or read book Directory of Graduate Research written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1971 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Book Synopsis Gas Phase Catalytic Hydrogenation of Alkynols Over Palladium and Nickel Catalysts by : Alberto González Fernández
Download or read book Gas Phase Catalytic Hydrogenation of Alkynols Over Palladium and Nickel Catalysts written by Alberto González Fernández and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Liquid Phase Hydrogenation of Aromatic Nitriles Over Supported Palladium Catalysts by : Lauren F. Gilpin
Download or read book The Liquid Phase Hydrogenation of Aromatic Nitriles Over Supported Palladium Catalysts written by Lauren F. Gilpin and published by . This book was released on 2016 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Liquid-phase Selective Hydrogenation of Phenylacetylene on Palladium Nanoparticles Supported on Mesoporous Silica by :
Download or read book Liquid-phase Selective Hydrogenation of Phenylacetylene on Palladium Nanoparticles Supported on Mesoporous Silica written by and published by . This book was released on 2009 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of palladium catalysts with ca. 1 wt% palladium supported on mesoporous silica with different pore sizes (MCM-41, SBA-15, and MCF) were prepared by deposition of colloidal Pd nanoparticles (Pd/X_col) and Pd(II)acetate solution (Pd/X_imp). MCM-41 and SBA-15 showed the XRD characteristic peaks indicating highly ordered hexagonal pore structure while MCF consisted of spherical cell and frame structure with average pore size of 2.7, 3.9, and 7.8 nm, respectively. Sizes of the colloidal Pd nanoparticles were about 2.3 nm. The supports pore structure did not affect the Pd particle size of Pd/X_col catalysts. For the Pd/X_imp, the Pd particle size was increased with increasing pore diameter of the supports. However, the largest Pd particle size was obtained on Pd/SBA-15_imp since the Pd particles were formed in a long cylindrical shape similar to SBA-15. The Pd/SBA-15_col exhibited the best catalyst performance in the liquid-phase selective hydrogenation of phenylacetylene under mild conditions (40 degress celsius, H2 pressure = 1-5 bar, 30 min). The appropriated pore structure and pore size of SBA-15 could provide a better encapsulation of Pd particles so that high styrene selectivity was attained at complete conversion of phenylacetylene. All the Pd/X_col catalysts exhibited no change in the catalyst activities/selectivity during the recyclability test for four cycles while the Pd/X_imp showed an increase of catalyst activity and lower styrene selectivity in some cases.
Book Synopsis Industrial Performance of Advanced Palladium Catalyst for Liquid Phase Selective Hydrogenation of Trace Diolefins in FCC Butenes by : Douglas M. Dolan
Download or read book Industrial Performance of Advanced Palladium Catalyst for Liquid Phase Selective Hydrogenation of Trace Diolefins in FCC Butenes written by Douglas M. Dolan and published by . This book was released on 2001 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Liquid-phase Hydrogenation of Butadiene in the Presence of Palladium Catalysts by : P. S. Ivanov
Download or read book Liquid-phase Hydrogenation of Butadiene in the Presence of Palladium Catalysts written by P. S. Ivanov and published by . This book was released on 1988 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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