Engelhard Corp

Rh(N03)3 stock solution (10.37% Rhby wt.) - Engelhard Corp. Perrhenic Acid stock solution (52.091% Re by wt.) - Engelhard Corp. Zirconyl Nitrate, hydrate - Aldrich Chemical Co. 

The authors thank to Engelhard Corp. providing the catalyst (E4759) as a gift. We also thank to Dr. Agnes Gomoiy for the MS measurements. 

Jpn. Pat. Tokko, 87-23726 (cited by Muori, T., in Chemical Catalyst News, Engelhard Corp, March 1991). 

Furukawa, Y., Yokogawa, A., Yokomizo, T., Komatsu, Y., Bull.]. P I. 15, 56 (1973) (cited as reference 7 by Muroi, T., in his review of selected industrial catalytic processes in Chemical Catalyst News, Engelhard Corp., March 1991). 

ART [Asphalt Residuum Treating] A process for converting heavy petroleum fractions into more easily processed liquid fractions. Developed by Engelhard Corp. and offered by the MW Kellogg Co. Three units were operating in 1996. 

BASF, Ludwigshafen, Germany Kemira OY, Pori, Finland Engelhard Corp./Mearl, N. J., USA... 

Catalysts. Some commercial PtRe catalysts listed in Table I were used in this study as well as some PtSn catalysts on which were reported elsewhere (7). The fresh catalysts B-6, B-7 and B-8 made in China are white because they are unreduced. Catalyst 803 made by Engelhard Corp. was grey because it had been reduced by the manufacturer. 

Materials. The noble metals were in all cases fine powders. The ruthenium, osmium, and iridium were heated ( 700 °C) under hydrogen, to minimize oxide coating, the metals being cooled in hydrogen and otherwise exposed only to dry nitrogen. Otherwise, the metal powders were used as supplied Pd, Pi, Ir from Engelhard Corp. East Newark, N.J. 07029, Qs from Strem Chemicals, Newburyport, MA 01950, Au from Orion Chem. 

Materials. Anhydrous HF and fluorine were supplied by Matheson Gas Products (East Rutherford, NJ), AgzO by Lancaster Synthesis Inc. (99+% Windham, NH) and Au by ROC/RIC (99.99% Sun Valley, CA). Pd, Pt and Ir were supplied by Engelhard Corp. (East Newark, NJ), Os by Streni Chemicals (Newburypoit, MA) and Ru from Johnson MaUhey Co. (London, UK). The alkali fluorides (Allied Chemical, B A quality, Morristown, NJ) were dried at 150 C under dynamic vacuum (< Torr). 

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