| abstract |
Isomerization processes such as the isomerization of ethylbenzene and xylenes are catalyzed by a new crystalline aluminosilicate zeolite designated UZM-55 comprising a novel framework type. The zeolite is represented by the following empirical formula: M + m RAl 1‑x Ex Si y O z where M represents zinc or is selected from Group 1 (IUPAC 1), Group 2 (IUPAC 2), Group 3 of the Periodic Table of the Elements (IUPAC 3) or one or more metals of the lanthanide series, including sodium, potassium or a combination of sodium and potassium cations, R is derived from reactants R1 and R2 (such as where R1 is diisopropanolamine and R2 is one or more organic structure directing agents chelating diamines), and E is an element selected from the group consisting of gallium, iron, boron, and mixtures thereof. Catalysts made from UZM‑55 have utility in a variety of hydrocarbon conversion reactions. |