| 摘要 |
Zeolite L containing caesium having enhanced catalytic properties is prepared by a process in which said zeolite L is crystallised from a synthesis mixture with a molar composition (expressed as oxides) of: <TABLE> and containing 0.5 to 20 ppm (by weight) of divalent metal cations, e.g. Mg ions. The zeolite L can form part of a dehydrocyclisation and/or isomerisation catalyst. |
