Supported catalysts containing vanadium pentoxide, titanium diox

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

1980-06-09

1982-04-13

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252437, 2603464, B01J 2106, B01J 2304, B01J 2322, B01J 2716

Patent

active

043246940

ABSTRACT:
A supported catalyst, containing vanadium pentoxide, titanium dioxide, phosphorus, rubidium and any optionally added cesium, with or without zirconium dioxide, in which the catalytic material contains from 1 to 40% by weight of V.sub.2 O.sub.5, from 60 to 99% by weight of TiO.sub.2 and/or ZrO.sub.2 and, based on the total amount of TiO.sub.2, ZrO.sub.2 and V.sub.2 O.sub.5, 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.

REFERENCES:
patent: 3894971 (1975-07-01), Reuter et al.
patent: 4007136 (1977-02-01), Blechschmitt et al.
patent: 4077984 (1978-03-01), Blechschmitt et al.

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