Process for manufacture of an attrition resistant catalyst
View Patent ↗A method for manufacturing of an attrition resistant vanadium/phosphorous oxide catalyst involving forming an aqueous slurry comprising; vanadium/phosphorous oxide catalyst or vanadium/phosphorous oxide catalyst precursor particles, an aqueous solution of H 3 PO 4 , and optionally an aqueous colloidal silica sol, an aqueous polysilicic acid solution or mixture thereof and then spray drying the slurry to form attrition resistant catalyst precursor followed by calcining/activating the spray dried precursor. Such a catalyst is particularly useful in oxidation processes such as the catalytic air oxidation of butane to maleic anhydride.
1. Process for manufacture of an attrition resistant vanadium/phosphorous oxide catalyst comprising the steps of:
a) forming a slurry comprising;
i) vanadium/phosphorous oxide catalyst or vanadium/phosphorous oxide catalyst precursor particles,
ii) aqueous H 3 PO 4 solution having a concentration of 50 to 125 millimolar, and
iii) optionally an aqueous colloidal silica sol, an aqueous polysilicic acid solution or mixture thereof;
b) spray drying the slurry from step (a) to form attrition resistant catalyst precursor solids; and
c) calcining the spray dried solids of step (b) to produce attrition resistant catalyst.