R.K. Grasselli, S.T. Oyama, A.M. Gaffney and J.E. Lyons's 3rd World Congress on Oxidation Catalaysis, Proceedings of PDF

By R.K. Grasselli, S.T. Oyama, A.M. Gaffney and J.E. Lyons (Eds.)

ISBN-10: 0444827722

ISBN-13: 9780444827722

The third global Congress on Oxidation Catalysis has its roots within the ecu Workshop on Selective Oxidation held in Louvain, Belgium in 1985. Out of this workshop grew the first international Congress held in Rimini, Italy in 1989. the second in Benalmadena, Spain in 1992, and the third being held now in 1997 in San Diego, California, united states. Out of the small center of devoted and enthusiastic scientists assembled in Louvain in 1985, grew now a huge base of scientists and technologists from academia, and govt laboratories who're fervently pursuing the topic of oxidation catalysis and are keen and keen to switch their findings on the present assembly. the general subject matter of the third global Congress is ''Atom effective Catalytic Oxidations for worldwide Technologies''. We selected this subject to stimulate the individuals to record their findings with an emphasis on holding worthy fabric of their catalytic alterations, in addition to retaining strength, and that during an environmentally accountable demeanour. growth in the direction of this acknowledged target is enormous as evidenced through the great reaction of our group of their participation of caliber courses compiled in those complaints of the Congress.

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20 4) B. Delmon, P. G. Carrazan, S. A. Vicente Rodriguez and Z. Sobalik, in "Catalysts in Petroleum Refining and Petrochemical Industries 1995", M. Absi-Halabi et al. ), Elsevier Science, 1996, p. Cavani and F. Trifirb, in "Catalysis Vol. 11", Royal Society of Chemistry, p. 246 6) S. Albonetti, F. Cavani and F. Trifirb, Catal. -Sci. , 38 (1996) 413 7) R. J. Hayes, J. Molec. C. M. C. Volta, Catal. Today, 32 (1996) 115 9) F. Cavani and F. Trifirb, Chemtech, 24 (1994) 18 10) Catal. Today, Special Issue on Vanadyl Pyrophosphate, G.

On the contrary, the W-containing compound exclusively yields isobutene as the product of partial oxidation. The olefin is obtained with a selectivity which is close to 60%. > carbon oxides > ~ ~ 340 n r e 360 G) u~ 0 380 400 temperature, ~ Figure 2. 6 s, feed composition 26% isobutane, 12% water, 13% oxygen, rest helium. The very different catalytic behavior originates from the different reducibility of the Mo 6+containing HPC with respect to the W o+ -containing compounds. The Keggin anion in the former compound easily undergoes 2-electron reduction, furnishing nucleophilic 0 2- species which can be incorporated into the activated organic substrate.

One possible hypothesis is the formation of stable esters by reaction between the acids and the surface P-OH groups. e. propane and isobutane). This may arise from the very strong acidity which is typical of these compounds (even when they are not in a protonic form) which favours the desorption of the organic acids, sparing them from consecutive reactions. These compounds also yield maleic anhydride from nbutane and n-pentane (but with remarkably lower selectivity than the vanadyl pyrophosphate), but they lack the surface properties which are necessary for the formation of phthalic anhydride from n-pentane.

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3rd World Congress on Oxidation Catalaysis, Proceedings of the 3rd World Congress on Oxidation Catalysis by R.K. Grasselli, S.T. Oyama, A.M. Gaffney and J.E. Lyons (Eds.)

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