title: SSZ-53 and SSZ-59: two novel extra-large pore zeolites.
abstract: The syntheses, structure solutions, and physicochemical and catalytic characterizations of the novel zeolites SSZ-53 and SSZ-59 are described. SSZ-53 and SSZ-59 were synthesized under hydrothermal conditions with the [1-(4-fluorophenyl)cyclopentylmethyl]trimethyl ammonium cation and 1-[1-(4-chlorophenyl)cyclopentylmethyl]-1-methyl azocanium cation, respectively, as structure-directing agents. The framework topology of SSZ-53 was solved with the FOCUS method, and the structure of SSZ-59 was determined by model building. Rietveld refinement of synchrotron X-ray powder diffraction data confirms each proposed model. SSZ-53 and SSZ-59 each possess a one-dimensional channel system delimited by 14-membered rings. Results from transmission electron microscopy, electron diffraction, catalytic experiments (spaciousness index and constraint index tests), and argon and hydrocarbon adsorption experiments are consistent with the proposed structures.
authors.affiliation: ChevronTexaco Energy Research and Technology Company, 100 Chevron Way, Richmond, CA 94802, USA. buaw@chevrontexaco.com
authors.forename: Allen
authors.initials: A
authors.lastname: Burton
authors.forename: Saleh
authors.initials: S
authors.lastname: Elomari
authors.forename: Cong-Yan
authors.initials: CY
authors.lastname: Chen
authors.forename: Ronald C
authors.initials: RC
authors.lastname: Medrud
authors.forename: Ignatius Y
authors.initials: IY
authors.lastname: Chan
authors.forename: Lucy M
authors.initials: LM
authors.lastname: Bull
authors.forename: Charles
authors.initials: C
authors.lastname: Kibby
authors.forename: Thomas V
authors.initials: TV
authors.lastname: Harris
authors.forename: Stacey I
authors.initials: SI
authors.lastname: Zones
authors.forename: E Steven
authors.initials: ES
authors.lastname: Vittoratos