| 摘要 |
<p>Attrition resistant metals/oxygen compositions comprising the infusion and reaction product of a refractory material characterized by a melting point of at least 1500 DEG C, a mean particle size from about 10 mu m to about 200 mu m, and a fractional porosity of at least 0.2, and at least one metal oxide, or compound convertible by heat to such metal oxide, having a maximum mean particle size of about 100 mu m with the proviso that the refractory material/metal oxide mean particle size ratio is at least 2, which metal oxide is susceptible of undergoing infusion and reaction with the refractory material upon being subjected to temperatures of at least 0.4 Tm for a time sufficient to cause infusion and reaction between the metal oxide and the refractory material, wherein Tm is the melting point in DEG K of the refractory material, are useful in a wide variety of metal oxide-catalyzed reactions. The compositions are especially useful in reactions which involve reaction conditions of high stress, for example, vapor phase oxidations under fluidized bed conditions.</p> |
