The syntheses of transition metal promoted (M ϭ Co, Cr, Fe, Mo) supported vanadium phosphate (VPO) catalysts (TiO 2 (anatase), γ-Al 2 O 3 ) and their characterization by N 2 -adsorption, X-ray diffractometry (XRD), FTIR-spectroscopy and determination of V-valence state is reported. The catalytic properties were checked in the heterogeneous catalytic ammoxidation of 2,6-dichlorotoluene to the corresponding nitrile. The catalyst samples were prepared by synthesis of the precursor compound VOHPO 4 · 0.5 H 2 O, impregnation using various metal salt solutions and mixing with the support materials. The characterization revealed increased surface areas for all the promoted samples in comparison
Synthese, Charakterisierung und katalytische Eigenschaften von promotierten VanadiumphosphatenInhaltsübersicht. Es wird über die Synthese von übergangsmetallionenpromotierten (M ϭ Co, Cr, Fe, Mo) Vanadiumphosphat-Trägerkatalysatoren (TiO 2 (Anatas), γ-Al 2 O 3 ), deren Charakterisierung durch N 2 -Adsorption, Röntgenbeugung, FTIR-Spektroskopie und Bestimmung der V-Oxidationszahl sowie die katalytische Ausprüfung in der heterogen katalysierten Ammoxidation von 2,6-Dichlortoluol zum entsprechenden Nitril berichtet. Die Katalysatormaterialien sind über die Synthese der Vorläuferverbindung, VOHPO 4 · 0,5 H 2 O, der Imprägnierung mit den entsprechenden Metallsalzlösungen sowie der Vermischung mit den Trägerkomponenten zugänglich. Die Charakterisierung zeigte für alle promotier-* Dr.
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