Get Hydrogenation with low-cost transition metals PDF

By Jacinto Sa, Anna Srebowata

ISBN-10: 149873054X

ISBN-13: 9781498730549

Hydrogenation with inexpensive Transition Metals describes contemporary advancements within the training of catalysts and their catalytic talents in chemoselective hydrogenation for the construction of good chemical compounds and pharmaceutical compounds. Emphasizing using reasonably cheap metals (Cu, Ni, Fe, and Ag) which are usually found in the shape of nanoparticles, the booklet presents important response mechanism schemes, engineering recommendations, and viewpoint for the field.

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Extra info for Hydrogenation with low-cost transition metals

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And, in 1924, Murray Raney developed a nickel fine powder catalyst, which was named after him, that is still widely used in hydrogenation reactions such as conversion of nitriles to 40 ◾ Hydrogenation with Low-Cost Transition Metals amines or the production of margarine. Since the beginning of the twentieth century, the popularity of the nickel catalyst has not waned. The application of nickel catalysts plays a crucial role in industrial technology such as nylon production (hydrogenation of benzene toward cyclohexane) and ammonia synthesis (the principal form of nitrogen used in fertilizers).

1 contains catalytic data obtained for all of the catalysts. For Ni/γ-Al2O3, 100% of the selectivity to ortho-chloroaniline (desired product) was obtained; however, the catalytic activity of this material was very low. 5 Reaction pathways associated with the hydrogen mediated conversion of para-chloronitrobenzene (p-CNB). The targeted route (I) to para-chloroaniline (p-CAN) is represented by bold arrows.  Cárdenas-Lizana, S. Gómez-Quero, M. A. Keane, Appl. Catal. A 334 (2008) 199–206.

Chen, J. Zhang, Catal. Commun. 8 (2007) 345–350. ) 48 ◾ Hydrogenation with Low-Cost Transition Metals became ortho-chloronitrosobenzene. 5) [20]. The reduction of para-chloronitrobenzene to para-chloroaniline involves the formation of nitroso- and hydroxylamine-intermediates (path I) that can participate in side reactions. The formation of dimeric azoxybenzene (path II) and azobenzene (path III) results from condensation–reduction involving para-chloroaniline, where conversion of the hydrazobenzene intermediate to para-chloroaniline (path IV) is favored in basic media [21].

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Hydrogenation with low-cost transition metals by Jacinto Sa, Anna Srebowata

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