1,721,489 research outputs found
David A. Vaccari
No full textDavid A. Vaccari, Stevens Institute of Technologyhttps://digitalcommons.montclair.edu/sust-seminar-headshots/1028/thumbnail.jp
A. Vaccari etc., La Redenzione, 1934
No full textRivière Jean. A. Vaccari etc., La Redenzione, 1934. In: Revue des Sciences Religieuses, tome 15, fascicule 3, 1935. pp. 460-461
REACTION PATHWAY IN VAPOR-PHASE HYDROGENATION OF MALEIC-ANHYDRIDE AND ITS ESTERS TO GAMMA-BUTYROLACTONE
No full textThe catalytic reactivity of maleic anhydride (MA), succinic anhydride (SA) and their dimethyl esters (dimethyl maleate and dimethyl succinate) in the vapour phase hydrogenation to gamma-butyrolacetone (GBL) was investigated. In order to obtain general data, both a multicomponent catalyst (CAT 1: Cu/Zn/Mg/Cr 40:5:5:50, atomic ratio %), obtained by reduction of a nonstoichiometric spinel-type precursor, and a commercial catalyst (CAT 2: Cu/Mn/Ba/Cr = 44:8:1:47, atomic ratio %) were used. The MA/GBL solution exhibited the highest GBL production, while the SA/GBL solution was converted only partially due to a competitive adsorption of GBL on the active sites, as evidenced by the similar reactivities observed with pure anhydrides. The best carbon balances were observed with the esters, probably the result of lowest light hydrocarbon synthesis and tar formation. With all the feedstocks, the activity of CAT 2 is higher than that of CAT 1, which, however, gives the best yield in GBL due its lower activity in the overhydrogenation and hydrogenolysis reaction. It was found that n-butanol (BuOH) and butyric acid (BuA) derived mainly from GBL. On this basis, the reactivities of the main products observed were investigated separately, confirming the stability of tetrahydrofuran (THF), which reacted only at high temperature with low conversions to ethanol. On the other hand, GBL gave rise to overhydrogenation and/or hydrogenolysis, with high conversion (mainly with CAT 2), confirming its key role in both reactions. Furthermore, the formation in the catalytic tests with BuA and BuOH of n-butanal, notwithstanding the high H-2/organic ratio, implies that it is the main intermediate in the hydrogenolysis reactions. A new reaction scheme is proposed, pointing out the key role of GBL as the ''intersection'' of two possible reaction pathways, giving rise to THF or overhydrogenation and hydrogenolysis products, respectively
Fourier-transform Ir Detection of Adsorbed Hydrogen On A Cu-Zn-Cr Low-temperature Methanol Synthesis Catalyst
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L’illustrazione di moda e la collaborazione con “Vogue” / Modna ilustracija i saradnja sa časopisom „Vogue“ / The fashion illustration and the collaboration with Vogue
No full text[CAPITOLO DI LIBRO
P. A. Vaccari, S. J., I Salmi tradotti dall' Ebraico con la Volgata di fronte, 1937
No full textDennefeld Louis. P. A. Vaccari, S. J., I Salmi tradotti dall' Ebraico con la Volgata di fronte, 1937. In: Revue des Sciences Religieuses, tome 18, fascicule 4, 1938. p. 530
P. A. Vaccari, S. J., I Salmi tradotti dall' Ebraico con la Volgata di fronte, 1937
No full textDennefeld Louis. P. A. Vaccari, S. J., I Salmi tradotti dall' Ebraico con la Volgata di fronte, 1937. In: Revue des Sciences Religieuses, tome 18, fascicule 4, 1938. p. 530
Marinetti e "Il poema del vestito di latte"
No full textSi esamina qui "Il poema del vestito di latte" del 1937, singolare componimento poetico dedicato da Marinetti alla moda nazionale e autarchica, nel quale si sottolinea la capacità di trasfigurazione analogica e metaforica del materiale inorganico
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