Supported catalysts containing vanadium pentoxide, titanium...

Details Supported catalysts containing vanadium pentoxide, titanium... Supported catalysts containing vanadium pentoxide, titanium...

B - Operations, Transporting

01

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260/365, 252/95

B01J 23/22 (2006.01) B01J 27/198 (2006.01) C07C 51/265 (2006.01) C07C 51/31 (2006.01) C07D 307/83 (2006.01) B01J 37/02 (2006.01)

Patent

CA 1146153

ABSTRACT OF THE DISCLOSURE: A supported catalyst, containing vanadium pentoxide, titanium dioxide, phosphorus, rubidium and/or cesium, with or without zirconium dioxide, in which the catalytic material contains from 1 to 40% by weight of V2O5, from 60 to 99% by weight of TiO2 and any optionally added IrO2 and, based on the total amount of ?iO2, ?rO2 and V2O5, up to 2% by weight of phosphorus and up to 1.5% by weight of rubidium and/or cesium, and which comprises two layers, of which the inner layer contains more than 0.2 and up to 2% by weight of phosphorus, but no rubidium and/or cesium, and the outer layer contains from 0 to 0.2% by weight of phosphorus and from 0.02 to 1.5% by weight of rubidium and/or cesium, the outer layer accounting for from 10 to 90% by weight of the total catalytic material.

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