摘要:
The present invention concerns spheroidal alumina particles characterized by a BET specific surface area in the range 150 to 300 m2/g, a mean particle diameter in the range 1.2 to 3 mm and a particle diameter dispersion, expressed as the standard deviation, not exceeding 0.1, a total pore volume, measured by mercury porosimetry, in the range 0.50 to 0.85 mL/g, a degree of macroporosity within a particle of less than 30%, and in which the dispersion of the diameters of the macropores, expressed as the ratio D90/D50, does not exceed 8.The invention also concerns processes for the preparation of said particles as well as catalysts comprising said particles as a support, and their use in catalytic hydrocarbon treatment processes, in particular in a catalytic reforming process.
摘要:
The invention relates to a catalyst support with an unsymmetrical multi-lobed cross-section in the shape of a helical extrudate having a rotational pitch comprised between 10 and 180° per mm.The invention also relates to a catalyst, a recovery mass or an adsorbent comprising said support.The invention also relates to the process for the preparation of said catalyst support in the shape of helical extrudates.