Approach to the surface characteristics of the H and H -LaT forms of cation-exchange resins by measurement of the heat of immersion
Surface characteristics of H and its multivalent cation-exchanged resins, which have been used as catalysts, were probed by measurement of the heats of immersion in 1-nitropropane, n-hexane, and water. It was found that the electrostatic field strengths (F) calculated from the heats of immersion in 1-nitropropane and n-hexane increased with increasing ratios of the exchanged multivalent cation (LaT ) in the univalent form (H ) cation-exchange resin. This tendency was also observed in the differences in F between the LaT exchanged resins and H form of the resin by using the calorimetric data obtained from the heats of immersion in water. These results suggest that the exchanged LaT ion does not homogeneously interact with three univalent anionic sites (SO3 ) of the cation-exchange resin, but interacts with only two SO3 ions, that is, the LaT ion is localized on the surface of the resin. The difference in F obtained from the heats of immersion into water was found to be useful as a simple and rapid criterion of the surface characteristics of the cation-exchange resins. 18 references, 4 figures, 1 table.
- Research Organization:
- Yamanashi Univ., Kofu, Japan
- OSTI ID:
- 6344885
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 89:23
- Country of Publication:
- United States
- Language:
- English
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ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROGEN COMPOUNDS
SOLUTION HEAT
ION EXCHANGE MATERIALS
SURFACE PROPERTIES
LANTHANUM COMPOUNDS
CATIONS
EXPERIMENTAL DATA
RESINS
CHARGED PARTICLES
DATA
ENTHALPY
INFORMATION
IONS
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
POLYMERS
RARE EARTH COMPOUNDS
THERMODYNAMIC PROPERTIES
400201* - Chemical & Physicochemical Properties