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E Alejandro Leon-Escamilla

Gregory John Lewis

Paula L Bogdan

Robert L Bedard

John D Sherman

Robert B Larson

Gregory F Maher

John E Bauer

David S Bem

Amedeo Napolitano

A process for isomerizing ethylbenzene into xylenes such as para-xylene using a zeolitic catalyst system based on low Si/AlMTW-type zeolite that preferably is substantially free of mordenite. The catalyst may be bimetallic where the two metals are platinum and tin.

Process for C8 alkylaromatic isomerization

A new family of crystalline molecular sieves have been synthesized. These compositions have a microporous structure of ZrO.sub.3 octahedral units, and at least one of SiO.sub.2 tetrahedral units and GeO.sub.2 tetrahedral units. Optionally, the molecular sieves contain M metals such as titanium, niobium, or tin. These novel molecular sieves are prepared hydrothermally from a reaction mixture composed of reactive sources of the components. Additionally, these molecular sieves are useful for the selective adsorption of ammonium ions.

Zirconium silicate and zirconium germanate molecular sieves and process

A new family of crystalline molecular sieves have been synthesized. These compositions have a microporous structure of at least ZrO.sub.3 octahedral units and SiO.sub.2 tetrahedral units. Optionally, the molecular sieves contain M metals such as titanium or tin. These novel molecular sieves are prepared hydrothermally from a reaction mixture composed of reactive sources of the components. Additionally, these molecular sieves are useful for the selective adsorption of ammonium ions.

Zirconium silicate molecular sieves and process using the same

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Mount Prospect, IL, United States of America

E Alejandro Leon-Escamilla