Patent ID: 6218335
Filing Date: 2001-04-17
Classification: B01J,C01G,C01P,Y10S

Abstract:
A porous spinel structure compound oxide showing a surface area per unit weight of not less than 80 m.sup.2 /g and being expressed by general formula MO--Al.sub.2 O.sub.3, which is obtained by impregnating a .gamma.-alumina carrier with a solution of a compound of metal element M capable of taking a valence of 2, drying the impregnated carrier and calcining it at a temperature of 600.degree. C. or higher, wherein said carrier showing a surface area per unit weight of not less than 150 m.sup.2 /g, a micro-pore volume per unit weight of not less than 0.55 cm.sup.3 /g and an average micro-pore diameter between 90 and 200 angstroms, wherein the micro-pores with a diameter between 90 and 200 angstroms thereof taking not less than 60% of the total micro-pore volume.