Discrete molecular sieve and use
AssigneeUop LLC
InventorsHemant W. Dandekar, David A. Lesch, Thomas M. Reynolds, Robert L. Patton, Stephen T. Wilson, Gregory J. Gajda
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Abstract
This invention presents a novel MgAPSO molecular sieve, containing a critical range of magnesium: in the sieve framework and having a small crystallite size, which is particularly active for hydrocarbon conversion. The sieve advantageously is incorporated, along with a platinum-group metal, into a catalyst formulation which is useful for isomerization. When utilized in a process for isomerizing a non-equilibrium mixture of xylenes containing ethylbenzene, a greater yield of para-xylene is obtained compared to prior-art processes.
Claims13
A crystalline MgAPSO molecular sieve which comprises from about 0.003 to 0.035 mol fraction of magnesium in the microporous crystalline framework structure and has an average crystallite diameter of no more than about 1.5 microns.
A catalytic composition for the isomerization of a non-equilibrium feed mixture of xylenes and ethylbenzene comprising 0.1 to 5 mass % platinum, alumina, and MgAPSO-31 molecular sieve, said sieve comprising from about 0.003 to 0.035 mol fraction of magnesium in thee microporous crystalline framework structure and having an average crystallite diameter of between about 0.5 and 1.5 microns.
Dependencies are inferred from the claim text.