Patent ID: 7880048

Claim:
A process for once-through conversion of a hydrocarbon feed comprising at least olefins containing 4 carbon atoms and at least olefins containing 5 carbon atoms, producing propylene, said process comprising passing said feed into at least one reaction unit provided with at least one catalyst in the form of spherical beads with a diameter in the range 1 to 3 mm, each of said spherical beads comprising at least one zeolite and at least one alumina-based, support and having a pore distribution such that the macroporous volume, measured by mercury porosimetry, is in the range 0.10 to 0.20 ml/g and the mesoporous volume, measured by mercury porosimetry, is in the range 0.25 to 0.35 ml/g, said catalyst further having a proportion of pore volume with pore size less than 20 nm in the range of 60-70%.