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been shown to exhibit high catalytic activity for alkane dehydrogenation [ 28 , 31 ] as well as oxidative cracking [ 32 ]. We report herein the catalytic hydrogenation of benzaldehyde and its derivatives with different substituents on the

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-step catalytic hydrogenation of nitrobenzene to PAP using supported noble metal catalyst in the presence of aqueous acid medium is gaining more importance because (1) it is a single-step process, (2) environmentally acceptable, (3) more efficient since the workup

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Journal of Flow Chemistry
Authors: Klára Lövei, István Greiner, János Éles, Áron Szigetvári, Miklós Dékány, Sándor Lévai, Zoltán Novák, and György István Túrós

In medicinal chemistry, the development of synthetic procedures for the access of new heterocyclic systems as potential scaffolds is elementary. Herein, we report our results on the formation of small drug-like heterocycles, utilizing flow chemistry. This approach enables the extension of the reaction parameter window, including high-pressure/high-temperature or hazardous chemistry. In our work, various novel condensed tricyclic benzothiazoles fused with furo- and thieno-rings were synthesized applying a multistep continuous-flow protocol. The process includes two ring closure steps and a nitro group reduction step. Batch and telescoped continuous-flow syntheses were also designed and performed.

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Abstract  

Atmospheric humidity in the surroundings of A-1 atomic power station is taken off by means of an absorption equipment in order to measure natural tritium concentration in atmosphere. Atmospheric water is reduced with Mg at 580°C, and hydrogen obtained is used for catalytic hydrogenation of acetylene. Optimum conditions of ethane preparation in dependence of temperature, molar ratio of the components, flow rate and the number of hydrogenation cycles when using the new selective nickel catalyst 40-01 are reported.

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Abstract  

The kinetic and solvent isotope effects during the maleic acid heterogeneous catalytic hydrogenation and deuteration in the light and heavy water have been studied. Also the effect of the γ and neutron irradiation on the Ni−ZnO catalysts (with various ratios of components) on the reaction kinetics and mechanism has been measured, as well as the effect of pH on the adsorption behaviour of maleic acid and the temperature depencence of the reaction rate. Existence of different adsorption centers for hydrogen and maleic acid could be deduced from these experiments. A reaction mechanism based on the two-dimensional diffusion of components in the surface is proposed.

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under investigation. Supported noble metals are the best catalysts for the catalytic hydrogenation of nitroarenes, which has replaced the old Bechamp process [ 2 ]. Catalytic hydrogenation leads to products with higher purity and at lower cost, been

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. Glasnov , J. D. Holbrey ,* C. O. Kappe ,* K. R. Seddon , T. Yan Green Chemistry 2012 , 13 , 3071 – 3076 . “ Facile heterogeneous catalytic hydrogenations of C═N and C═O bonds in neat water: anchoring of water-soluble metal

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model was very close to the value determined experimentally. We have now extended that work and report here an SET analysis of the catalytic hydrogenation of a range of substituted nitroarenes over Au/TiO 2 . Aromatic amines are extensively used

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Reaction Kinetics, Mechanisms and Catalysis
Authors: Viorel Chihaia, Karl Sohlberg, Margarita Gabrovska, Rumeana Edreva-Kardjieva, Dorel Crişan, Peter Tzvetkov, Maya Shopska, and Iskra Shtereva

, the catalytic hydrogenation of CO and/or CO 2 over transition metal catalysts to form methane, simply called methanation, is a particularly promising technique for removal of carbon oxides resulting in production of energy carriers or chemicals [ 1

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.4% within 0.5 h and the selectivity of 1-phenylethanol is 31.1%. The Co loading shows significant influence on the catalytic hydrogenation activity, and the increase of activity is higher than the increase of Co loading. Table 1

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