High pore volume VPO catalyst for maleic anhydride production

摘要

Embodiments of the present invention disclose improved micro-pore catalyst structures containing catalytic material comprised of mixed oxides of vanadium and phosphorus and using such improved micro-pore catalyst structures for the production of maleic anhydride.

主权项

1. A catalyst for the catalytic oxidation of hydrocarbons to produce a carboxylic acid anhydride comprising an active VPO catalyst, wherein the active VPO catalyst is characterized by:
(i) having a total pore volume, micro-pores and a micro-pore volume, wherein the micro-pores are pores on the active VPO catalyst that each have a pore diameter of 0.6 microns or less; (ii) optionally having macro-pores, wherein the macro-pores are pores on the active VPO catalyst that each have an individual pore diameter from above 0.6 microns to 10 microns; (iii) the micro-pore volume is at least 0.2 cc/g and comprises at least about 55% of the total pore volume; and (iv) the total pore volume is at least 0.27 cc/gand wherein the active VPO catalyst has been contacted with a fluid comprising an organic solvent.