Conclusions
-
1.
The water contained in boehmite, bayerite, hydrargillite,γ-Al2O3 and in the Na- and Cr-forms of types A, X, and Y zeolites, was determined by direct titration with Fischer reagent.
The method is applicable for the determination of the accessible water and weakly bound to the surface.
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2.
All the sorbed water is determined in boehmite, bayerite, and hydrargillite. In the case ofγ-Al2O3, the water whose activation energy of dehydration from the surface does not exceed 16 kcal/mole is determined.
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3.
In the Na forms of zeolites, all the sorbed water is determined by titration, whereas in the case of the chromium forms only part of the water is determined, which is due to blockage of the entrance apertures of the zeolite lattice by hexaaqua-complexes of chromium.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 764–770, April, 1972.
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Sherman, F.B., Klimova, V.A., Khodakov, Y.S. et al. Determination of water in catalysts and sorbents. Russ Chem Bull 21, 725–730 (1972). https://doi.org/10.1007/BF00854460
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DOI: https://doi.org/10.1007/BF00854460