Results 161 to 170 of about 2,438 (214)

Introduction to faujasites

2017
This chapter gives an introduction and physical properties of faujasites. The EMT-FAU type frameworks are also analyzed. The crystal structures, lattice sites, lattice parameters and space groups of some representative zeolites are tabulated.
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Ion exchange in dealuminated faujasites

Zeolites, 1986
Abstract Dealuminated faujasites with Si Al ratios of 3.8, 4.5 and 7.0 were prepared by e.d.t.a. extraction and SiCl4, treatment. Cs+, NH4+, Ca2+ and La3+ exchange isotherms of the Na+ form of these dealuminated faujasites were determined predominantely at 25°C, but to a lesser extent at 65°C and 80°C.
Cai-Ying Li, Lovat V.C. Rees
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Magnetic properties of faujasites

2017
This chapter gives data and a brief introduction about the magnetic properties of faujasites.
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Direct synthesis of copper faujasite

Catalysis Today, 2005
Abstract Copper containing faujasite has been successfully prepared for the first time using a direct synthesis method. Faujasite type zeolite can be prepared in the presence of copper species by tuning the synthesis conditions. Ammonium hydroxide was used to form a copper complex that was later mixed with the reacting gel.
Beatriz O. Hincapie, Luis J. Garces, Sinue Gomez, Ruma Ghosh, Steven L. Suib   +4 more
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Thermal Expansion of Faujasites

2017
This chapter gives a brief introduction about the thermal expansion behavior of faujasites. Linear and volume expansion coefficients of some faujasites crystals are also tabulated.
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Crystal structures of faujasites

2017
This chapter gives an introduction for the crystal structures of faujasites. A good number of studies on extraframework cation locations in faujasites type zeolites are also given. Extraframework sites occupations in X-type and Y-type zeolites are tabulated. Displacements of cations from the oxygen ring planes are given as well.
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Photoluminescence of ?-naphthol adsorbed on faujasites

Journal of Applied Spectroscopy, 1978
The investigation of the emission spectra of an organic base, viz., quinoline, adsorbed on ion-exchange Y-zeolite forms has demonstrated the possibility of using a luminescence method for the identification and qualitative evaluation of the strength of the proton-donor sites in faujasite [i].
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Characterization of defects in dealuminated faujasite

Zeolites, 1988
A NaY zeolite was dealuminated with SiCl 4 vapor. Subsequent acid washing of this sample gave a dealuminated Y (DAY) that had an aluminum content of 120 ppm. Both i.r. spectroscopy and 29 Si n.m.r. techniques (Bloch Decay and cross-polarization) detected several different types of SiOH present in the DAY. Additionally, n.m.r.
G.J. Ray, A.G. Nerheim, J.A. Donohue
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Positions of cations and molecules in zeolites with the faujasite framework VI hydrated La-exchanged faujasite

Materials Research Bulletin, 1969
Abstract Hydrated La-exchanged faujasite has a similar cation distribution to that of hydrated Ca-exchanged faujasite, differing only in observed occupancy of the sites. Hence the cation distribution is probably governed by simple ionic rules.
J.M. Bennett, J.V. Smith
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Thermal behaviour of modified faujasites

Journal of Thermal Analysis, 1980
A derivatograph was used to follow the modification of the skeleton structure and thermal stability of zeolites in sodium and ammonium forms. Analogous investigations were carried out by independent methods such as IR and X-ray. Comparison showed good agreement between the results. The controlled dealumination of the Y-type zeolite enhanced the thermal
A. J. Chandwadkar, S. B. Kulkarni
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