Patent ID: 7534415
Filing Date: 2009-05-19
Classification: B01D,B01J,C01B,C01F,C01P

Abstract:
1. A process for the preparation of a mesostructured, non-amorphous, crystalline transition alumina composition which exhibits: (i) at least one low angle x-ray diffraction line corresponding to a lattice spacing of at least 2.0 nm; and (ii) multiple wide angle x-ray diffraction lines between 10 and 80 degrees 2⊖ with CuKα radiation where λ is 0.1541 nm corresponding to an ordered oxygen atom lattice with aluminum in interstitial positions within the lattice; wherein the surface area is at least 200 m 2 /g; wherein the pore volume is at least 0.40 cm 3 /g; which process comprises: heating a mesostructured, non-amorphous, crystalline hydrated alumina composition exhibiting: (i) at least one low angle x-ray diffraction line corresponding to a lattice spacing of at least 2.0 nm; and (ii) multiple wide angle x-ray diffraction lines between 10 and 80 degrees 2⊖ with Cukα radiation wherein λ is 0.1541 nm, corresponding to an ordered lattice comprised of oxygen atoms and hydroxide groups with aluminum in interstitial positions within the lattice to a temperature in the range 400 to about 900° C. for a period of time to cause dehydration of the hydrated alumina and the formation of the mesostructured form of the non-amorphous, crystalline transition alumina.