Uop Lcc

Aaron James Imrie

Sanjay B Sharma

John Edward Kulach

A novel process for converting C to C aliphatic hydrocarbons to aromatics and catalyst for use in this process are disclosed. The catalyst that contains a zeolite having a silica to alumina molar ratio greater than about 20 and a pore diameter from about 5 &angst; to about 6 &angst;, an essentially non-acidic binder, and a gallium component. The binder is selected from silica, zirconia, titania, and mixtures thereof and results in a catalyst formulation having both enhanced selectivity to desired C -C aromatic products and improved stability compared to prior art compositions. Preferred zeolites that can be used include those of the MFI structure type, with ZSM-5 being a specific example.

Process for preparing a catalyst for aromatic production

This invention is drawn to a catalyst system comprising two or more molecular sieves, including at least one non-zeolitic molecular sieve and one zeolitic aluminosilicate, having specified contrasting pore structures and to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using the subject catalyst system to obtain an improved yield of para-xylene from the mixture relative to prior-art processes.

Aromatics isomerization using a dual-catalyst system

This invention is drawn to a catalyst system comprising two or more molecular sieves, including at least one non-zeolitlc molecular sieve and one zeolitic aluminosilicate, having specified contrasting pore structures and to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using the subject catalyst system to obtain an improved yield of para-xylene from the mixture relative to prior-art processes.

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Des Plaines, IL, United States of America

Aaron James Imrie