Alumina-based bodies obtained by agglomeration which are resistant to elevated temperatures
AssigneeRhone-Poulenc Industries
InventorsMax Michel, Regis Poisson
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Abstract
Alumina based bodies having resistance to temperatures of up to 1200.degree. C prepared by autoclaving alumina and at least one additive from the group of oxides of lanthanum, neodymium, praseodymium and thorium. Bodies of the alumina of this invention are useful in adsorption and catalysis.
Claims14
Alumina-based substances stabilized to a calcination temperature of approximately 1200.degree. C, prepared by autoclaving alumina and 1 to 15% by weight of at least one additive selected from the group consisting of the oxides of lanthanum, neodymium, praseodymium and thorium, and calcining the resulting blend, with said alumina having been produced by partial dehydration of hydrargillite or an alumina gel to produce activated alumina and then autoclaving the activated alumina to form said alumina.
Alumina-based substances stabilized to calcination temperatures up to 1200.degree. C prepared by combining (1) alumina produced by partial dehydration of hydrargillite or an alumina gel followed by autoclaving to produce the alumina, and (2) from 1 to 15% by weight of at least one additive selected from the group consisting of the oxides of lanthanum, neodymium, praseodymium and thorium, autoclaving the combination of alumina and additive and calcining the combination at a temperature up to 1200.degree. C.
Dependencies are inferred from the claim text.