Preparation of alumina having increased porosity

Details Preparation of alumina having increased porosity Preparation of alumina having increased porosity

C - Chemistry, Metallurgy

01

F

C01F 7/02 (2006.01) B01J 13/00 (2006.01)

Patent

CA 2131796

A process for making high porosity boehmite alumina comprising forming an aqueous dispersion of a boehmite alumina which has been obtained by hydrothermally treating an aqueous mixture of a precursor boehmite alumina at a pH of from about to about 9 for a period of time sufficient to convert the greater portion of the precursor boehmite alumina to a colloidal sol, treating the dispersion of the hydrothermally treated alumina to form a viscous gel and subjecting the gel to sufficient shearing force for a sufficient period of time to increase the pore volume by at least 30 % and the median pore radius by at least 20 %.

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