| 摘要 |
The present invention provides a process for the preparation of a catalyst composition which comprises, as first cracking component, a zeolite beta with a silica to alumina molar ratio of at least 20 comprising crystals less than 100 nm in size, and a second cracking component selected from (i) crystalline molecular sieves having pores with diameters greater than 0.6 nm, and (ii) clays, the process comprising the steps of: (i) preparing a mixture comprising the first cracking component and the second cracking component, the first cracking component being in the form of a sol, (ii) extruding the mixture into catalyst extrudates, and (iii) calcining the extrudates.
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