| 摘要 |
PURPOSE:To obtain a catalyst carrier having satisfactory high temp. resistance by being composed of an amorphous composition, which is a precursor of a specific layered aluminate structure and is heat treated at a non-crystallizing temp. CONSTITUTION:This carrier is composed of the amorphous composition, which is the precursor of the layered aluminate structure expressed by a formula MexAlyOz (Me is alkali metal, alkaline earth metal, rare earth element, y/x:4-24, (z) is a value settled by Me, (x) and (y)), and is heat treated at the non- crystallizing temp. And the Me is composed of two or more kinds of elements, the elements are >=0.95Angstrom in ionic radius of 6-coordination and the difference of ionic radius between the element having the max. ionic radius and another elements having ionic radius smaller than that of the element is >=0.3Angstrom . As a result, the catalyst carrier excellent in high temp. resistance and large in specific surface area is obtained. |
