Production of Spherical Granules of Alumina with Controlled Porous Structure
Статья (Full article),
Applied Catalysis (up to 1991)
||aluminium hydroxide, granulated alumina, mechanical strength, porous structure, pseudoboehmite, spherical particles, textural characteristics.
Institute of Catalysis, Siberian Branch of the USSR Academy of Sciences
Structural changes of aluminium hydroxides at main technological stages are studied to produce spherical alumina with a given volume of pores. Two hydroxides essentially different in morphology, particle size and type of bond between primary particles have been synthesized. A collected of alumina with varied volumes of pores and effective radii has been obtained using a mixture of hydroxides of both types. We show how to calculate the volumes of meso- and macropores as well as the specific surface area of alumina and its precursors on the basis of the characteristics of each hydroxide and their ratio in the mixture.