Patent ID: 7608728

Claim:
A process for preparing propylene oxide, which comprises at least the steps (i) and (ii): (i) providing a catalyst comprising at least one porous oxidic material, wherein the provision of the catalyst in (i) comprises at least the steps (a) and (b): (a) preparing the at least one porous oxidic material; (b) producing a shaped body using the porous oxidic material obtained in (a); wherein the production of the shaped body in (b) comprises at least the steps (aa) to (dd): (aa) kneading the porous oxidic material in (a) with addition of at least one binder or at least one extrusion aid or at least one pore former or a water-containing composition or a mixture of two or more thereof; (bb) shaping the kneaded mixture obtained in (aa) to give at least one shaped body; (cc) drying the shaped body obtained in (bb); and (dd) calcining the dried shaped body obtained in (cc); wherein at least one pore former is added in step (aa); (ii) reacting propene with a hydroperoxide in at least one nitrile as solvent or in a solvent mixture comprising at least one nitrile in the presence of the catalyst of (i); wherein the at least one porous oxidic material is a zeolite which is assigned X ray crystallographically to the MWW type.