Crush resistant adsorptive agglomerates of activated alumina
AssigneeRhone-Poulenc Chimie
InventorsThierry Chopin, Patrick Fourre, Philippe Jaeger, Bernard Taxil
Life of this patent
Estimating the term…
Abstract
Activated alumina agglomerates having a crush resistance of at least 12 daN, measured on that fraction thereof having a mean diameter ranging from 3 to 4 mm, and an adsorptive capacity greater than 18% by weight, well adopted as adsorbents in a wide variety of purification processes, are prepared by agglomerating activated alumina particulates, maturing the resulting agglomerates in the presence of a complexing agent for the cation Al.sup.3+, and then thermally treating the matured agglomerates at a temperature ranging from about 100.degree. to 500.degree. C.
Claims35
Activated alumina agglomerates having a crush resistance of at least 15 daN, measured on that fraction thereof having a mean diameter ranging from 3 to 4 mm, and an adsorptive capacity greater than 18% by weight, wherein the adsorptive capacity is expressed as a percentage by weight of water adsorbed and the activated alumina agglomerates having a surface morphology thereof comprising microrods.
Agglomerates of activated alumina comprising a core matrix essentially consisting of poorly crystalline or amorphous alumina and a sheath thereon which comprises microrod excrescences., the agglomerates comprising greater than 5% of boehmite and at least 30% of bayerite.
Dependencies are inferred from the claim text.