Patent ID: 7090824
Filing Date: 2006-08-15
Classification: B01D,B01J,C01B,C01F,C01P

Abstract:
1. A mesostructured crystalline hydrated alumina composition consisting essentially of boehmite with atomically ordered crystalline framework walls forming mesopores, without amorphous hydrated alumina, and exhibiting at least one low angle x-ray diffraction line corresponding to a lattice spacing of at least 2.0 nm and multiple wide angle x-ray diffraction lines with CuKα radiation wherein λ is 0.1541 nm and the boehmite particularly has characteristic 2θ/° diffraction lines of the multiple wide angle lines as shown in FIGS. 2 and 5 marked “As-made” and 7 B marked “MSU-S/B” corresponding to an ordered lattice comprised of oxygen atoms and hydroxide groups with aluminum in interstitial positions within the lattice, wherein the surface area is at least 200 cm 2 /g; and wherein the pore volume is at least 0.40 cm 3 /g, wherein the boehmite is formed by mixing a precursor amorphous hydrated alumina and an organic modifier which forms the mesostructure and then heating the mixture so that the boehmite is completely formed and then removing water and the organic modifier to provide the composition which can be calcined to form a transition alumina.