[CH3:1][CH:2]([CH2:4][CH3:5])[O-:3].[Al+3:6].[CH3:7][CH:8]([CH2:10][CH3:11])[O-:9].[CH3:12][CH:13]([CH2:15][CH3:16])[O-:14].[OH2:17].[N+]([O-])(O)=[O:19]>C(O)(CC)C>[CH3:1][CH:2]([CH2:4][CH3:5])[O-:3].[Al+3:6].[CH3:7][CH:8]([CH2:10][CH3:11])[O-:9].[CH3:12][CH:13]([CH2:15][CH3:16])[O-:14].[OH2:19].[OH2:17].[OH2:3].[OH2:3].[Al:6]Aluminum sec-butoxide was prepared in accordance with the process described in U.S. Pat. No. 4,242,271. A 75% mixed solution of this aluminum sec-butoxide in sec-butyl alcohol was hydrolyzed at 85° C. with a mixed solution of sec-butyl alcohol containing 30% of water to obtain an alumina slurry. After the alumina slurry was aged at 125° C. for 3 hours in an electromagnetically stirring autoclave, water was immediately added to the alumina slurry until a solids content was 20%, and the thus-treated alumina slurry was cooled. The pH of the alumina slurry was adjusted with a 3.8% aqueous solution of nitric acid to obtain Alumina Hydrate 6A. Alumina hydrate A obtained by drying colloidal sol of this alumina hydrate was determined by X-ray diffractometry and found to have a pseudoboehmite structure. At this time, the BET specific surface area was 175 m2/g, and the pore volume was 0.65 ml/g. Incidentally, the specific surface area and pore volume were determined by the following respective methods.
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