Zeolite L with cylindrical morphology
AssigneeExxon Research & Engineering Co.
InventorTheodorus M. Wortel
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Abstract
A zeolite related to zeolite L and having a characteristic cylindrical morphology may be prepared from a crystallization gel comprising (in mole ratios of oxides): K.sub.2 O/SiO.sub.2 : 0.22-0.36 H.sub.2 O/K.sub.2 O: 25-90 SiO.sub.2 /Al.sub.2 O.sub.3 : 6-15 and preferably with the mole ratio H.sub.2 O/K.sub.2 O+Al.sub.2 O.sub.3 +SiO.sub.2 being at least 8. The cylindrical Zeolite L may be used as a catalyst base in aromatization of acyclic hydrocarbons with high benzene yields being sustained over commercially feasible periods.
Claims27
A zeolite having an X-ray diffraction pattern obtained from CuK.sub..alpha. radiation with significant d values set out in Table A hereinbefore and comprising highly crystalline crystallites having at 50% of its crystallites in the form of distinct circular cylinders with an aspect ratio of at least 0.5 and with a mean diameter of at least 0.5 micron.
A catalyst comprising a zeolite having an X-ray diffraction pattern obtained from CuK.sub..alpha. radiation with the significant d values set out in Table A hereinbefore and comprising highly crystalline crystallites having at least 50% of its crystallites in the form of distinct circular cylinders with a mean diameter of at least 0.5 micron and with an aspect ratio of at least 0.5 and a catalytically-active metal.
Dependencies are inferred from the claim text.