Advanced NMR characterization of zeolite catalysts. Sixth quarterly report, 1 January 1985-31 March 1985

Technical Report · Mon Apr 01 04:00:00 EST 1985

OSTI ID:5866694

Welsh, L B

The program discussed in this report is a two-year two-phase joint UOP-University of Illinois study of the application of improved high resolution solid state nuclear magnetic resonance (NMR) techniques to the characterization of zeolite catalysts. During the first phase of this program very pure, and in some cases isotopically enriched faujasites will be prepared and studied by magic angle sample spinning NMR (MASS NMR) and variable angle sample spinning NMR (VASS NMR) on 500 and 360 MHz (proton frequency) NMR spectrometers. The NMR techniques that will be emphasized are the measurement and analysis of the /sup 17/O NMR properties, /sup 27/Al NMR intensity quantitation, and /sup 27/Al and /sup 29/Si NMR relaxation rates. During the second phase of this program these NMR techniques will be used to study the effects of impurity concentration, dealumination treatments and cation exchange on the NMR properties of faujasites. The initial emphasis of this program during Phase I is on the preparation and measurement of the NMR properties of /sup 17/O enriched Na-Y faujasites. The effort in each phase is broken into four tasks: (1) zeolite preparation; (2) standard zeolite characterization; (3) measurement of zeolite NMR properties; and (4) analysis of NMR data. The main efforts during the sixth three-month period of the program have been in five areas: (1) Manuscript preparation of the /sup 17/O NMR results for faujasites, (2) Synthesis of Ga substituted faujasites, (3) Synthesis of /sup 17/O enriched AlPO-n microporous materials, (4) Preliminary /sup 17/O NMR studies of /sup 17/O enriched AlPO/sub 4/-5, and (5) Preliminary spin-lattice relaxation rate measurements of /sup 17/O enriched zeolites. 8 refs., 1 fig.

• Research Organization: Signal UOP, Inc., Des Plaines, IL (USA). Research Center
• DOE Contract Number: FG22-83PC60779
• OSTI ID: 5866694
• Report Number(s): DOE/PC/60779-6; ON: DE85010143
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CATALYSTS
CHEMICAL PREPARATION
DATA
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FAUJASITE
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTOPES
LIGHT NUCLEI
MATERIALS
MINERALS
NMR SPECTRA
NUCLEI
NUMERICAL DATA
OXYGEN 17
OXYGEN ISOTOPES
RESEARCH PROGRAMS
SILICATE MINERALS
SPECTRA
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
ZEOLITES